J1837 NDC Crosswalk, Billing Units, ASP Payment & Medicare Reimbursement

📋 J1837 summary

J1837 is a HCPCS Level II J-code used to bill posaconazole, 1 mg, billed per 1 MG. The number of billing units to report depends on the dose administered and the NDC/package billed — use the calculator below.

Code J1837 Billing unit 1 MG Payment limit $0.342/unit NDC-Crosswalk 7 Quarter Q3 2026 RxCUI Atlas Trace the drug concept →

⚠ An NDC↔HCPCS crosswalk and a published payment limit do not guarantee payer coverage or payment. Always verify the current payer policy and claim format before billing.

🗂️ Key billing facts

HCPCS codeJ1837

DescriptorInj, posaconazole, 1 mg

Billing unit1 MG

Payment limit / unit$0.342

Est. ASP / unit$0.323 est.

Mapped NDCs7

Data periodQ3 2026

Last updated2026-08-20

💊 About Posaconazole DRUG GUIDE

Posaconazole is used to treat invasive aspergillosis (a serious mold infection that can spread through the body) in adults and certain pediatric patients, depending on the formulation and weight.

It is also used to treat oropharyngeal candidiasis (OPC) — a yeast infection of the mouth and throat, including cases that have not responded to itraconazole and/or fluconazole — and this use is specific to the oral suspension in patients aged 13 and older.Posaconazole is also used for prophylaxis (prevention) of invasive Aspergillus and Candida infections in people at high risk because their immune systems are severely compromised — such as stem cell transplant recipients with graft-versus-host disease (GVHD) or people with blood cancers who have low white blood cell counts from chemotherapy.

The specific formulation approved for prevention varies by age and weight.

Read the full Posaconazole drug guide →

Clinical overview from our editorial drug guide for Posaconazole. For billing reference, see the sections above.

🧾 Billing & reimbursement HCPCS · CMS · EFF. Q3 2026

📅 Payment limits effective Q3 2026 — from the CMS Medicare Part B Payment Limit File (revised quarterly).

Medicare payment limit / unit

$0.342

Est. ASP / unit

$0.323 est.

Est. after 2% sequester

$0.335

HCPCS dosage

1 MG

The CMS payment limit is the Medicare Part B drug allowance (ASP + 6%, statutory). After the 2% federal sequester the effective payment is ≈ ASP + 4.3%; estimated ASP = payment limit ÷ 1.06. Source: CMS Medicare Part B Payment Limit File (quarterly), Q3 2026.

🧮 Dosing & billing-units calculator HCPCS UNITS

One billing unit of J1837 = 1 mg. Enter a regimen to convert dose → billing units and project a full course.

Dose per administration (mg) Frequency — every days Number of doses NDC / package billed (optional)

Billing units = dose ÷ HCPCS unit size. Most payers require whole units — round per the payer's policy. “Est. Medicare pay” uses the current payment limit. For single-dose vials, drug discarded after administration may be separately billable with modifier JW (JZ when none is discarded) where allowed. Always verify payer-specific rounding before billing.

🔁 NDCs that bill under J1837 WITH EST. MEDICARE PAY

7 NDCs map to J1837. Bill units = how many HCPCS units one package represents. Est. pay / pkg = payment limit ($0.342/unit) × that package's bill units.

NDC (11-digit)	Drug	Labeler	Package	Strength	Bill units	Est. pay / pkg	NADAC / unit	Status	Source
42023-0195-01	Posaconazole 18 mg/mL INJECTION	Par	1 VIAL, GLASS in 1 CARTON (42023-195-01)...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
55150-0388-01	POSACONAZOLE 18 mg/mL INJECTION	Eugia	1 VIAL, SINGLE-DOSE in 1 CARTON (55150-388...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
63323-0685-17	Posaconazole 18 mg/mL INJECTION, SOLUTION	Fresensius	1 VIAL, SINGLE-DOSE in 1 CARTON (63323-685...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
67457-0665-20	posaconazole 18 mg/mL SOLUTION	Mylan	1 VIAL, GLASS in 1 CARTON (67457-665-20)...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
68462-0904-01	posaconazole 18 mg/mL INJECTION, SOLUTION	GLENMARK	1 VIAL in 1 CARTON (68462-904-01) / 16.7...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
68462-0911-01	posaconazole 18 mg/mL INJECTION, SOLUTION	GLENMARK	1 VIAL in 1 CARTON (68462-911-01) / 16.7...	18 mg/mL	300	$102.60	—	● Active	CMS + PDAC
31722-0370-31	POSACONAZOLE 18 mg/mL SOLUTION	Camber	1 VIAL, GLASS in 1 CARTON (31722-370-31)...	18 mg/mL	18	$6.16	—	● Active	PDAC

NDC→HCPCS mappings come from the CMS ASP NDC-HCPCS crosswalk; additional DME MAC / DMEPOS mappings come from PDAC and are labeled separately. NADAC from CMS (weekly). “Status” reflects the product's marketing / obsolete flag in the NDC directory. Presence or absence here does not determine Medicare coverage. Linked NDCs open the full product page.

📊 Medicare utilization & spend CMS · PART B · 2026 (Q1)

Total Part B spend

$1.2K

Claims

12

Beneficiaries

—

Spend / beneficiary

—

Spend / claim

$102.28

Where J1837 ranks among Part B drugs · 2026 (Q1) · neighbors ±5

Total spending — #761 of 824

#756 TIGAN J3250 $1.4K #757 AMPICILLIN-SULBACTAM... J0295 $1.3K #758 HYDRALAZINE HCL J0360 $1.3K #759 DOXY 100* J1271 $1.3K #760 CYTARABINE J9100 $1.2K #761 POSACONAZOLE J1837 $1.2K #762 BUMETANIDE J1939 $1.2K #763 CEFOXITIN SODIUM* J0694 $1.2K #764 GASTROGRAFIN* Q9963 $1.1K #765 VANCOMYCIN HCL(J3374... J3374 $1.1K #766 METHOCARBAMOL* J2800 $1.1K

Total claims — #817 of 824

#812 BICILLIN C-R J0558 13 #813 ZINPLAVA J0565 13 #814 PELLOGRAFT, PER SQ C... Q4320 13 #815 RETACRIT(Q5105) Q5105 13 #816 ACETAMINOPHEN(J0134) J0134 12 #817 POSACONAZOLE J1837 12 #818 HYMPAVZI PEN J7172 12 #819 DERMACYTE AMN MEM AL... Q4248 12 #820 ORION, PER SQ CM** Q4276 12 #821 DERMACYTE AC MATRX P... Q4343 12 #822 ARGATROBAN-0.9% NACL... J0883 11

Full breakdown by period (1)

Period	Total spend	Beneficiaries	Claims	$/beneficiary	$/claim
2026 (Q1)	$1.2K	—	12	—	$102.28

Provider-administered (Part B) spend, calculated for the whole HCPCS code (CMS does not publish Medicare spend per individual NDC). Self-administered use is covered under Part D instead. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part B Spending by Drug (data.cms.gov), updated quarterly.

📊 What bills under J1837

J-codes are billing codes often used for drugs billed under the medical benefit. This connects the billing code to the NDC package records it covers, by ingredient and labeler.

NDC products by ingredient

posaconazole 4

POSACONAZOLE 2

Posaconazole 2

NDC products by labeler

Mylan Institutional LLC 2

GLENMARK PHARMACEUTICALS INC., USA 2

Camber Pharmaceuticals, Inc. 1

Par Health USA, LLC 1

Eugia US LLC 1

Fresensius Kabi USA, LLC 1

🔗 Related NDC directory pages

🧪 All Posaconazole NDCsIngredient 🧪 All Posaconazole NDCsIngredient 🧪 All Posaconazole NDCsIngredient 🏭 All Mylan labeler NDCsLabeler 67457 🏭 All GLENMARK labeler NDCsLabeler 68462 🏭 All Camber labeler NDCsLabeler 31722 🏭 All Par labeler NDCsLabeler 42023 📚 All Azole Antifungal NDCsDrug class

🗃️ Data sources & freshness

Every figure on this page is computed from public datasets. Here's what each section draws on and how current it is.

HCPCS code & descriptor

CMS HCPCS Level II code file

Not available in current dataset

Payment limit & billing unit

CMS Medicare Part B ASP Pricing File (quarterly)

Q3 2026 · as of 2026-08-20

NDC ↔ HCPCS crosswalk

CMS ASP NDC-HCPCS crosswalk + DMEPDAC (PDAC)

7 NDCs mapped

NADAC acquisition cost

CMS National Average Drug Acquisition Cost (weekly)

Not available for mapped NDCs

Utilization & spend

CMS Part B Spending by Drug · PSPS · Physician & Other Practitioners

Latest data year 2026

Figures are estimates for reference and may lag the source files. Always verify against the current CMS files and your payer's policy before submitting claims.

⚠️ Practical billing caveats

A crosswalk is not coverage. An NDC mapping or a published payment limit does not guarantee a payer will cover or pay this code. Check the specific plan's policy.
Units ≠ milligrams. Bill the number of HCPCS units (dose ÷ the code's unit size), not the milligram dose. Use the calculator above.
Discarded drug. For single-dose vials, drug discarded after administration may be separately billable with modifier JW (and JZ when nothing is discarded) where the payer allows.
Rounding & partial units. Many payers require whole units; round per the payer's policy, not automatically up.
The code can cover more than this drug. Some HCPCS codes span multiple products or strengths — confirm the exact code for the product administered.
Figures lag. ASP limits change quarterly and utilization data are released with a delay. Verify against the current CMS files before billing.

❓ J1837 billing FAQ

What is HCPCS code J1837?

J1837 is a HCPCS Level II J-code used to bill Inj, posaconazole, 1 mg under Medicare Part B and most medical (not pharmacy) benefits.

What is the billing unit for J1837?

One unit of J1837 represents 1 MG. Report the number of units equal to the dose administered divided by 1 MG.

How many units of J1837 should I bill?

Divide the dose administered by the code's unit size (1 MG) to get the number of billing units, then round per your payer's policy. The calculator on this page converts a dose into billing units and projects a full course.

How much does Medicare pay for J1837?

The Medicare Part B payment limit is $0.342 per unit (Q3 2026), based on ASP + 6%. After the 2% sequester the effective payment is about $0.335 per unit. Payment limits are revised quarterly.

Which NDCs bill under J1837?

7 NDCs currently map to J1837 in the CMS ASP NDC-HCPCS crosswalk. See the NDC crosswalk table above for each product, package, billing units and estimated reimbursement.

Does a crosswalk mean J1837 is covered?

No. An NDC-to-HCPCS crosswalk and a published payment limit do not guarantee coverage or payment. Coverage depends on the payer, the diagnosis and the site of care — always verify the current policy before billing.

J1837 – Inj, posaconazole, 1 mg · NDC Crosswalk & Billing Units