Bowel Prep Products – What Quantity and Days’ Supply to Bill?

PAAS National® last wrote an article on bowel prep products in June 2022 titled Bowel Prep Products – Days’ Supply Considerations. Since then, a few new products have been approved and added to the market. The most common PBM audit issue PAAS sees with bowel prep products is billing an incorrect days’ supply.

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Product NCPDP Quantity Beyond-Use Date
CLENPIQ® 320 mL n/a
GoLYTELY® 4000 mL 48 hours after mixing
MoviPrep® 1 EA 24 hours after mixing
SUFLAVE™ 2 EA 24 hours after mixing
SUPREP® 354 mL n/a
SUTAB® 24 EA n/a

PAAS Tips:

  • Make sure you are billing the correct quantity – some are billed in mL and some as EA
  • Bowel prep products should be billed as 1- or 2-day supply, depending on the dosing schedule
    • PBMs will often flag claims that have been billed as a 30-day supply due to the beyond-use dating of these products
  • If the prescription is written “Use as Directed”, PAAS suggests contacting the prescriber to find out if the patient is to follow the package directions or if the prescriber had directed the patient to take it in a different manner. The pharmacy can also verify the directions if the patient has instruction sheets
  • Once clarified, document a clinical note on the prescription and update the patient’s label with the specific directions or “use as directed per package” and bill the appropriate 1- or 2-day supply
  • Beware – if the prescription instructions for use indicated chronic/maintenance dosing (e.g., 30 days or includes refills), clarify indication and confirm that there was no order entry error
    • Prescriber may have intended MiraLAX® which also has polyethylene glycol 3350 and is intended for chronic treatment; mixed one capful at a time, there is no meaningful beyond-use date to consider

Qualified Medicare Beneficiary (QMB) Program

Pharmacies may bill prescriptions from time to time for patients with dual eligibility, possessing both Medicare and Medicaid benefits. Some of these patients are eligible for the Qualified Medicare Beneficiary (QMB) program which provides Medicaid coverage of Medicare Part A and Part B premiums and cost sharing to low-income beneficiaries – CMS states that about 12% of Medicare patients were in this program in 2021.

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Federal law prohibits Medicare providers (including pharmacies) from billing QMB patients for cost sharing amounts related to Medicare Part A or B covered items. QMB patients bare no legal obligation to pay cost sharing for these items – cost sharing amounts must only be billed to Medicaid. If there is a copay after billing Medicaid, pharmacies may collect this amount.

Pharmacies are most likely to encounter these situations when a dual eligible patient has a Medicare Advantage Plan (MAPD) and you are billing for Part B covered items like diabetic test strips, continuous glucose monitor supplies, or nebulizer drugs. Pharmacies may see a claim response of “Benefit Stage Qualifier (BSQ) 51” in NCPDP D.0 field 393-MV to alert you that items were covered under the Part B benefit and that balance billing is prohibited.

Please note that the QMB Program and prohibitions on collecting copays apply to Part B covered items only; pharmacies must continue to collect copays for Part D covered drugs.

PAAS Tips:

  • Be on the lookout for BSQ 51 response messages when billing for Part B covered items to patients with MAPD plan
  • If patient states they are a QMB but the claim system does not provide BSQ 51 message, then follow-up with the MAPD plan or the state Medicaid program

Early Refills of Titrated Medications Lead to Recoupments

Titration is a common practice for certain medications where prescribers start a patient on a low dose and gradually increase the amount over time to find what’s most effective. Classic examples of titrated medications include: warfarin, antidepressants, antidiabetics like insulin and metformin, GLP-1s, opioids, and thyroid products.

Sometimes the titration directions will come on one prescription with the intention for the patient to increase their dose over time using the same medication strength (or even one prescription indicating multiple strengths, but not clearly written as additional prescriptions). Other times, prescribers will send multiple scripts for multiple strengths of these medications at the same time with the intention for the patient to refill the new strength once the current one is depleted. In all cases, it is important to …

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make sure you are not refilling or filling the next prescription early as audit risks loom.

Example 1:

Prescription written for Victoza® 18 mg/3 mL. Quantity 9 mL. Directions of inject 0.6 mg once daily for one week, then increase to 1.2 mg once daily for one week, then increase to 1.8 mg once daily.

The actual days’ supply of the first fill is 37. Each fill thereafter is a 30-day supply. If you refill the claim 25 days after the first fill, you are at risk of a “refill too soon.”

Example 2:

First prescription written for Mounjaro® 2.5 mg/0.5 mL. Quantity 2 mL. Directions of inject 2.5 mg once weekly for 4 weeks.

Second prescription written for Mounjaro® 5 mg/0.5 mL. Quantity 2 mL. Directions of inject 5 mg once weekly for 4 weeks.

Third prescription written for Mounjaro® 7.5 mg/0.5 mL Quantity 2 mL. Directions of inject 7.5 mg once weekly for 4 weeks.

Each prescription filled should last the patient 28 days. If you fail to place the 5 mg and 7.5 mg prescriptions on hold and fill all three at once, the 5 mg and 7.5 mg prescriptions are likely to be recouped for “refill too soon,” “therapeutic duplicate,” “over utilization,” or “clinical misuse.”

PAAS Tips:

  • Ensure the accurate days’ supply is billed on all titrated medications.
  • If plan limits do not allow the correct days’ supply, follow PAAS’ Can You Bill It As 30 Days? guidance and do not refill until the actual days’ supply is nearing depletion.
  • If receiving multiple prescriptions for the same medication with different strengths, place those not being used first on hold until the patient requires a refill.
  • Not all patients will do well on the starter dose and may never require the additional medication.
  • Filling those medications early may lead to waste.
  • If the titration dose and maintenance dose are on the same prescription, consider the following options to accurately bill/dispense the medication:
  • Enter the prescription into the system with the SIG representing the full titration and maintenance dose, making sure to adjust the days’ supply (and/or quantity) on subsequent refills.
    • Note: refills may process automatically, resulting in a wrong days’ supply or quantity. A wrong days’ supply would likely cause an early refill on the third dispensing, forcing the pharmacy to rebill the second claim.
  • Enter the prescription in the system as two separate prescriptions, one for the titration and one for the maintenance dose. The titration can reference the maintenance dose in the SIG for patients and staff guidance.
  • Review any DUR rejections and properly document resolutions.
  • See the December 2023 Newsline article, Documentation Deep Dive: Meeting Auditors’ Standards in DUR and SCC, for more.

Walgreens Reaches $360 Million Settlement with Humana Regarding Inflated Prescription Drug Prices

In January 2024, Walgreens and Humana reached a $360 million settlement to resolve ongoing lawsuits where Humana argued that Walgreens violated the PBM agreement by artificially inflating prescription drug prices for years. Humana was initially awarded $642 million by an arbitrator a few years prior, which Walgreens challenged in court.

All of this back and forth is based on a dispute over the PBM contract definition of “Usual & Customary” (U&C) pricing and Walgreens’ Prescription Savings Club (PSC). Humana argued that the PSC prices represent Walgreens’ true U&C or cash prices and that Walgreens did not submit these prices on claims to Humana. Walgreens argued that PSC prices are not U&C because club prices are not available to the general public because members must sign up and pay an annual fee to get access to these lower PSC prices.

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In an interesting twist, the law firm representing Humana in this dispute is the same law firm that Walgreens retained in 2008 to provide advice on structuring their PSC in the first place. Walgreens contends that the law firm “switched sides” and actively solicited Humana to pursue the lawsuit against Walgreens.

This is not the first lawsuit brought by an insurer against Walgreens (or CVS). These two chains are “big fish” with deep pockets and are much more susceptible to legal action. Despite the legal entanglements, Walgreens continues to offer their PSC nationwide.

While independent pharmacies are individually at much lower risk of legal actions from PBMs based on U&C pricing policies, the underlying contracts have similar language. PAAS National® has often seen PBM auditors ask pharmacies to provide cash prices for select drugs during onsite audits – any price quotes provided should be caveated that these prices are reflective of that business day only and may fluctuate based on date and pharmacy costs.

PAAS Tips:

  • Pharmacies should review third-party reimbursement and evaluate their competitive marketplace when setting U&C prices.
  • PAAS cautions against “discount clubs” or automatically lowering prices for cash customers without modifying the U&C.

Miebo™ Eye Drops – What is the Days’ Supply?

Miebo™ is the first and only prescription eye drop used to treat dry eye syndrome by directly targeting tear evaporation. PAAS National® has fielded several calls regarding Miebo™ asking how to calculate the days’ supply. Per DailyMed, Miebo™ comes in a package size of 3 mL. Section 16 of the package insert states it is supplied in a multi-dose 5 mL bottle. Which measurement, 3 mL, or 5 mL, should you use to calculate the days’ supply? Miebo™ is billed as 3 mL; there are 3 mL of active ingredient in a 5 mL multi-dose bottle, presumptively to make administration easier. However, based on information from the Bausch + Lomb website, the days’ supply calculation remains complicated. Miebo™ contains only one ingredient (perfluorohexyloctane), unlike other eye drops that contain water, preservatives, and steroids. Eye drop formulations with water have a typical drop size of 30 to 50 microliters. The Miebo™ drop size is much smaller at 11 microliters, causing problems with the traditional 15 to 20 drops per mL estimate.

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Per the manufacturer, the preservative free multi-dose 3 mL bottle should give the patient a one-month supply with the normal dosing of 1 drop , in both eyes, four times a day. Approximating based on a drop size that is 1/3 -1/5 smaller, the patient should get 3 to 5 times more drops. That would be anywhere from 135 – 300 total drops, with 240 drops being required for a 30-days’ supply.

PAAS Tips:

2024 Self-Audit Series #1: Insulin Prescriptions

Starting this month, we will be refreshing our Self-Audit Series with new and updated information. Each month will focus on different prescription types and provide pharmacies with information PAAS National® analysts are currently seeing on PBM audits. These articles can be an excellent training tool for new employees, and a great refresher for all pharmacy staff, to avoid audit discrepancies.

PAAS Tips: 

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  • Dosage Form/Strength/Substitution
    • Prescription should clearly indicate vials or pens – this should not be assumed.
    • Concentration of the insulin should be clearly stated if more than one exists (e.g., U-100 vs U-500).
    • See the February 2024 Newsline, Insulin Substitution Review: Understanding Purple Book Terminology
    • Consider the pen device administrable dosing increments (0.5, 1, 2 or 5-unit increments)
    • Quantity
      • Pharmacies should never assume they know what the prescriber intended for quantity; if unclear, be sure to clarify and document appropriately.
        • Quantity of “one” is not sufficient for audit purposes and requires clarification.
      • Unit-of-measure for the quantity prescribed must identify mL, pens, boxes, or units.
      • Auditors will look at the overall quantity prescribed, so increasing to dispense a full box of pens must be authorized by the prescriber and documented, or additional quantity taken out of the refills authorized, where allowed by state law.
        • If the prescription is for 9 mL with 2 refills (and your state allows you to accelerate refills), the pharmacy can still only dispense one 15 mL box without calling the prescriber for additional authorization.
      • Instructions for Use
        • Incomplete or unclear instructions should be clarified and documented prior to dispensing.
        • Sliding scales or titration prescriptions must include a max daily dose the patient can use.
        • Patient label must match prescription instructions, including max daily dose if clarified.
      • Days’ Supply
        • Calculate days’ supply based off the directions on the prescription.
        • Follow instructions on our Can You Bill It As 30 Days? guideline if days’ supply for smallest package size (1 box for pens) exceeds plan limit.
        • Do not assume the days’ supply indicated on electronic prescriptions is correct, this field will not be taken into consideration by auditors.
        • Priming units for insulin pens are typically 2 units per injection; however, some pens require different priming units. Document priming units if used in days’ supply calculation.
        • Be mindful of expiration dates for vials and pens – days’ supply should not exceed this date.
        • Do not bypass plan limits by altering the days’ supply to get a paid claim. Follow the plan guidance and obtain a prior authorization if necessary.
      • Route of Administration
        • Insulin pens should always be self-administered.
        • Rapid-acting insulin vials may be used for injection or in an insulin pump.
  • Resource for Insulin Pens and Vials
    • PAAS National® provides members with a practical Insulin Medication Chart
      • This chart includes package size and dosage form, units/mL, total units per package and beyond use dates for pens and vials.

Continuous Glucose Monitor (CGM) Billing and Supply Allowance

CMS has issued an update on the Glucose Monitor – Policy Article effective as of January 1, 2024. A supplier now has the option to bill and dispense up to a 90-day supply for procedure codes A4238 (Adjunctive CGM) and A4239 (Non-Adjunctive CGM).

The policy article states:

“Up to a maximum of three (3) months, ninety (90) days of the supply allowance may be billed for code A4238 or A4239 to the DME MAC at a time and suppliers may not dispense more than a ninety (90) day supply.”

Below is a helpful chart to categorize the Dexcom and FreeStyle CGM products, their respective NCPDP billing units, and corresponding days’ supply.

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Product NDC NCPDP Billing Unit Day’s Supply
Dexcom G6 Receiver 08627-0091-11 1 Each Once a year
Dexcom G6 Transmitter 08627-0016-01 1 Each Every 3 months
Dexcom G6 Sensor 08627-0053-03 3 Each Every 30 days
Dexcom G7 Receiver 08627-0078-01 1 Each Once a year
Dexcom G7 Sensor 08627-0077-01 1 Each Every 10 days
FreeStyle Libre 14-day Sensor 57599-0001-01 1 Each Every 14 days
FreeStyle Libre 14-day Reader 57599-0002-00 1 Each Every 3 years
FreeStyle Libre Reader 57599-0000-21 1 Each Every 3 years

PAAS Tips:

  • When billing Medicare Part B claims for procedure codes A4238 or A4239, claims are billed as 1 unit of service (UOS) per 30 days
  • The NCPDP billing units shown in the chart above would apply to non-Medicare Part B claims
  • A CGM supply allowance includes all items necessary for the use of the device and includes, but is not limited to, CGM sensors and transmitters
    • For adjunctive CGMs , the supply allowance code (A4238), does not include supplies for a Blood Glucose Monitor (BGM.). Any required BGM supplies must be billed separately
    • For non-adjunctive CGMs, the supply allowance code (A4239), also includes a home BGM and related supplies in the bundled payment (test strips, lancets, lancing device, calibration solution, and batteries)
    • See our April 2022 Newsline, Billing Blood Glucose Test Strips for a Patient Who Utilizes a Continuous Glucose Monitor for the definitions of Adjunctive and Non-Adjunctive CGMs
  • The supplier must monitor usage and verify the beneficiary has sufficient supplies to last for each 30-day billing period
  • Utilize the CGM Supply Allowance Billing Calculator found on your DME MAC website to help determine when the next date of service can be billed
    • CGS
    • Noridian
  • Check the same/similar tool in myCGS for a complete claim history to be sure the patient has not received supplies from another supplier in the last 30 or 90 days
  • If the patient requires a replacement sensor, transmitter, or receiver due to a product failure, be sure to document and replace the item while reaching out to the manufacturer
  • Beware that any PBM, including Medicare B, will recoup or deny a claim if it is refilled too soon based on days’ supply guidelines above

Be on the Lookout for Eye Drops Requiring Extra Billing Consideration

Correctly billing eye drops requires a little extra thought and consideration, but it does not have to be a daunting task. Follow these simple steps and remember to be on the lookout for the unique eye drops listed below.

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  1. Ensure the prescription has calculable directions including which eye, or eyes, the drops are being utilized in, the frequency for which they are used, and a specified quantity (e.g., mL, bottles, vials)
  2. Calculate the days’ supply using PBM published guidelines regarding appropriate drops per milliliter; refer to the PAAS Eye Drop Guidance tool on the Member Portal for a listing of eight top PBMs and their required drops/mL
  • If a PBM does not provide published guidance, use 20 drops/mL for solutions and 15 drops/mL for suspensions and emulsions
  1. Adjust the days’ supply billed, when necessary, to account for manufacturer product labeling such as manufacturer beyond use dating (available at U.S. National Library of Medicine DailyMed website)
Medication Available Package Sizes Manufacturer Beyond Use Date
AzaSite® 1% solution 2.5 mL 14 days
Rhopressa® 0.02% solution 2.5 mL 42 days
VyzultaTM 0.024% solution 2.5 mL, 5 mL 56 days
Xalatan® 0.005% solution 2.5 mL 42 days
  1. Ensure drops available in single-use vials are calculated based on the number of vials needed per day, not drops/mL
Medication NDC Package Size Special Considerations
Restasis® 0.05% emulsion 00023-9163-30

00023-9163-60

 Carton of 30 vials

Carton of 60 vials

 The emulsion from one single-use vial is to be used immediately after opening for administration to one or both eyes; the remaining contents should be discarded immediately

Caution: Restasis® is also available in a 5.5 mL multi-dose preservative-free bottle NDC 00023-5301-05
Xiidra® 5% solution 00078-0911-12 Carton of 60 vials The solution from one single-use container is to be used immediately after opening and can be used to dose both eyes; the remaining contents should be discarded immediately
Zioptan® 0.0015% solution 82584-0609-30 Carton of 30 vials The solution from one individual vial is to be used immediately after opening for administration to one or both eyes; the remaining contents should be discarded immediately

PAAS Tips:

  • Prescriptions written for “1 bottle” are handled differently from one PBM to the next
    • Auditors will often use a vague quantity (or directions, drug formulation, etc.) to their advantage and flag the claim for recoupment
    • Avoid time-consuming appeal procedures across all PBMs by contacting the prescriber’s office and clarifying vague or ambiguous information prior to billing (i.e., quantity from “1 bottle” to number of milliliters)
  • If the treatment duration (e.g., “use for 10 days”) is less than the calculated days’ supply, submit the true calculated days’ supply
  • If discard instructions (e.g., “discard after 10 days”) are included on the prescription and it is a smaller days’ supply than the calculate days’ supply, submit the claim with a days’ supply matching the treatment duration
  • Refer to the March 2024 Newsline regarding special billing considerations for MieboTM ophthalmic solution

2024 DMEPOS Series #1: Diabetic Test Strips

Many pharmacies struggle with DMEPOS audits due to the complexity in medical billing and the onerous documentation requirements. Medicare Part B suppliers need to be able to produce all the required documentation if audited and make sure all documentation meets Medicare Part B standards. This DMEPOS series is intended to help you understand these complexities and gather the needed documents.

In particular, you should be able to show the following if audited on diabetic test strips:

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Standard Written Order (SWO):

  • Beneficiaries name OR Medicare Beneficiary Identifier (MBI)
  • The order date – this cannot be stamped
  • A detailed description of the items ordered
  • The quantity to be dispensed
  • Treating practitioner’s name OR NPI
  • Treating practitioner’s signature – this cannot be stamped

Dispensing/Proof of Delivery:

  • Beneficiary name
  • Delivery address
  • Detailed description of the item(s)
  • Quantity delivered
  • Date delivered – must match the date of service billed
  • Signature of beneficiary or representative

Delivery/Mailing:

  • When delivering or mailing test strips to Medicare beneficiaries, the pharmacy must have a proof of refill request (PORR) and affirmative response from the beneficiary or their representative including, at minimum:
  • Requestor’s name (beneficiary or authorized representative)
  • A description of each item being requested
  • Documentation of an affirmative response indicating a need for the refill
  • Includes confirmation that the beneficiary is still using the item
  • No changes have been made to the order
  • A refill is needed
  • Date of the request
  • DMEPOS items and supplies that are provided on a recurring basis must be based on prospective, not retrospective, use
  • Contact with the beneficiary, or authorized representative, must take place no sooner than 30 calendar days before the expected end of the current supply

Medical Records:

  • A covered diagnosis
  • Testing frequency (including rationale and testing logs if the patient is exceeding Medicare guidelines)
  • Continued need and use
  • Signed by the treating practitioner

Billing:

  • Bill the “Medicare/Medicaid” version of strips, when available
  • Verify the NDC being billed is for the correct package size
  • Attach the correct modifier – whether the patient is on insulin (KX) or not on insulin (KS)

PAAS Tips:

  • While refills are not a required element on the SWO, if the practitioner writes for refills, they will be honored exactly as specified regardless of the total quantity written.
  • If an order is for a 90-day supply with three refills (or 360 total days), and the patient requests a 30-day supply at a time, Medicare will only allow for the three additional fills.
    • Consider asking the prescriber to resend the SWO written for 30 days’ supply at a time plus an adjusted number of refills to avoid unauthorized refills.
  • Any corrections to an SWO must be signed and dated by the prescriber prior to submitting a claim.
  • If you call the prescriber’s office for a clarification to the order and document the clarification with a clinical note (e.g., MD clarified #30 with 11 refills is ok), that note should be counter-signed by the prescriber to validate the change. (This is not standard practice for non-DMEPOS claims, but DME MACs are enforcing this for Medicare Part B billing.)
  • Alternatively, ask the prescriber to send a new SWO with the additional information.
  • For an item that the beneficiary obtains in-person at your pharmacy, the signed delivery slip or copy of an itemized sales receipt is sufficient documentation for a refill request and affirmative response.
  • The supplier must provide the DMEPOS product no sooner than 10 calendar days before the expected end of the current supply – regardless of whether the refill is picked up in the pharmacy or delivered.
  • While obtain medical records prior to billing is rarely pragmatic, it is prudent to consider when patients are exceeding guidelines for testing (as prescribers may be unaware of requirements and subsequent Medical Records may be lacking sufficient detail for payment).
  • If you have reason to believe the strips will not be covered by Medicare, consider obtaining a signed Advance Beneficiary Notice (ABN) of Non-coverage prior to dispensing.
  • Allows the transfer of financial liability back to the patient in the event the claim is denied.
  • ABN must be completely and appropriately filled out and specify the reason Medicare may deny the claim.
  • ABN must be completed and signed on or prior to the date of service.
  • Use all the tools and resources available on your local DME MAC website to ensure you are compliant with Medicare’s billing and documentation rules.

Dosing Increments for Insulin Pens

While insulin pens allow ease and convenience for diabetic patients, they also come with increased audit risks, for a variety of reasons, including dosing.

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Prescribers are often unaware of what each insulin pen is capable of dispensing. Pharmacies must be hypervigilant of possible instructions that the insulin pen would not be able to deliver. Clinically, the patient would not be able to receive the prescribed number of units, and an audit discrepancy could be flagged. Appealing these types of discrepancies can often be very difficult.

While most insulin pens can be dialed in 1-unit increments, this is not the case for all pens. There are strengths of insulin pens that can only be dialed in 0.5-unit, 2-unit and 5-unit increments. Prior to dispensing these exceptions, the pharmacy must ensure the instructions for use are administrable with the pen prescribed. If the directions don’t coincide with the dosing increments (e.g., 57 units of Tuojeo® Max Solostar®), contact the prescriber for a correction.

Insulin Dosing Increments
Humalog® Junior KwikPen® 0.5 units
Toujeo® Max Solostar® 2 units
Tresiba® Flextouch® 200units/mL 2 units
Humulin® R U-500 KwikPen® 5 units

PAAS Tips:

  • Educate all pharmacy staff on the different insulin pens and their dosing ability
  • Contact prescribers if dosing or strength must be adjusted and add a clinical notation
    • Clinical notes should contain the date/time, person to whom the call was made (and their title), a brief summary of the discussion, and the pharmacy employee’s name/initials
    • Ensure the patient label is updated, and patients are counseled, accordingly
  • Be sure to utilize our Insulin Medication Days’ Supply Chart, available on the PAAS Member Portal, for additional insulin information