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J0840

J0840 – Injection, crotalidae polyvalent immune fab (ovine), up to 1 gram · NDC Crosswalk & Billing Units

HCPCS Level II J-code · Medicare Part B drug billing
J-code ● 1 NDC crosswalked per UP TO 1 GM $1,906.906/unit ASP+6%

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Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

📋 J0840 summary

J0840 is a HCPCS Level II J-code used to bill crotalidae polyvalent immune fab (ovine), up to 1 gram, billed per UP TO 1 GM. The number of billing units to report depends on the dose administered and the NDC/package billed — use the calculator below.

Brand names associated with J0840: Crofab

Code J0840 Billing unit UP TO 1 GM Payment limit $1,906.906/unit NDC-Crosswalk 1 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 codeJ0840
DescriptorInjection, crotalidae polyvalent immune fab (ovine), up to 1 gram
Billing unitUP TO 1 GM
Payment limit / unit$1,906.906
Est. ASP / unit$1,798.968 est.
Mapped NDCs1
Data periodQ3 2026
Last updated2026-08-20

🧾 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
$1,906.906
Est. ASP / unit
$1,798.968 est.
Est. after 2% sequester
$1,868.768
HCPCS dosage
UP TO 1 GM
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.
Full HCPCS code details (official CMS record)
Long descriptionInjection, crotalidae polyvalent immune fab (ovine), up to 1 gram
CoverageC — Carrier/MAC judgment
Pricing indicator51 — Drug — priced under the ASP methodology
Type of service1 — Medical care
BETOS-2O1E
ASC payment groupYY
Action codeN — No maintenance this year
Effective date2012-01-01
Date added2012-01-01
Source: CMS HCPCS Level II code file (imported via admin).

🧮 Dosing & billing-units calculator HCPCS UNITS

One billing unit of J0840 = 1 gm. Enter a regimen to convert dose → billing units and project a full course.
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 J0840 WITH EST. MEDICARE PAY

1 NDC map to J0840. Bill units = how many HCPCS units one package represents. Est. pay / pkg = payment limit ($1,906.906/unit) × that package's bill units.
NDC (11-digit)DrugLabelerPackageStrength Bill units Est. pay / pkg NADAC / unit StatusSource
50633-0110-12 CroFab ovine crotalidae venoms immune fab 1 g/1; 1 g/1; 1 g/1; 1 g/1 INJECTION, POWDER, LYOPHILIZED, FOR SOLUTION BTG 2 VIAL, GLASS in 1 CARTON (50633-110-12)... 1 g/1; 1 g/1; 1 g/1; 1 g/1 2 $3,813.81 — ● Active CMS ASP
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 · 2025 (Q1-Q4)

Total Part B spend
$430.7K
Claims
51
Beneficiaries
50
Spend / beneficiary
$8,613.82
Spend / claim
$8,444.92
Where J0840 ranks among Part B drugs · 2025 (Q1-Q4) · neighbors ±5
Total spending — #614 of 918
#609 ADRIAMYCIN* J9000 $463.1K #610 DILAUDID* J1171 $461K #611 MODERNA COVID (6M-1... 91321 $448.3K #612 CAREPATCH PER SQ CM*... Q4236 $445.2K #613 TEMODAR J9328 $444.3K #614 CROFAB J0840 $430.7K #615 ANAVIP J0841 $407.4K #616 AVONEX (4 PACK)* Q3027 $406K #617 CHORIPLY, PER SQ CM*... Q4359 $396.6K #618 KINEVAC* J2805 $396.1K #619 DEFEROXAMINE MESYLAT... J0895 $356.1K
Total claims — #846 of 918
#841 DEXAMETHASONE INTENS... J8540 53 #842 CANCIDAS* J0637 52 #843 IXINITY J7213 52 #844 ZEVTERA J0681 51 #845 CLINDAMYCIN-0.9% NAC... J0737 51 #846 CROFAB J0840 51 #847 ARTACENT VERICLEN, P... Q4339 51 #848 FLUPHENAZINE HCL J2679 50 #849 ARRANON* J9261 49 #850 EPINEPHRINE J0166 48 #851 ERAXIS J0348 48

Full breakdown by period (1)
PeriodTotal spendBeneficiariesClaims$/beneficiary$/claim
2025 (Q1-Q4) $430.7K 50 51 $8,613.82 $8,444.92
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.

🗃️ 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
Loaded
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
1 NDC 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 2025
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.

❓ J0840 billing FAQ

What is HCPCS code J0840?
J0840 is a HCPCS Level II J-code used to bill Injection, crotalidae polyvalent immune fab (ovine), up to 1 gram under Medicare Part B and most medical (not pharmacy) benefits.
What is the billing unit for J0840?
One unit of J0840 represents UP TO 1 GM. Report the number of units equal to the dose administered divided by UP TO 1 GM.
How many units of J0840 should I bill?
Divide the dose administered by the code's unit size (UP TO 1 GM) 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 J0840?
The Medicare Part B payment limit is $1,906.906 per unit (Q3 2026), based on ASP + 6%. After the 2% sequester the effective payment is about $1,868.768 per unit. Payment limits are revised quarterly.
Which NDCs bill under J0840?
1 NDC currently map to J0840 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 J0840 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.
For professional billing reference only — verify against the current CMS files before submitting claims.