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J1808

J1808 – Inj, folic acid, 0.1 mg · NDC Crosswalk & Billing Units

HCPCS Level II J-code · Medicare Part B drug billing
J-code ● 2 NDCs crosswalked per 0.1 MG $0.051/unit ASP+6%

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

📋 J1808 summary

J1808 is a HCPCS Level II J-code used to bill folic acid, 0.1 mg, billed per 0.1 MG. The number of billing units to report depends on the dose administered and the NDC/package billed — use the calculator below.

Code J1808 Billing unit 0.1 MG Payment limit $0.051/unit NDC-Crosswalk 2 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 codeJ1808
DescriptorInj, folic acid, 0.1 mg
Billing unit0.1 MG
Payment limit / unit$0.051
Est. ASP / unit$0.048 est.
Mapped NDCs2
Data periodQ3 2026
Last updated2026-08-20

💊 About Folic Acid DRUG GUIDE

Folic acid — available as tablets, oral solution, and injection — is used to treat megaloblastic anemia (anemia caused by a folic acid deficiency), including types seen in poor nutrition, pregnancy, infancy, and childhood, as well as in conditions like tropical and nontropical sprue (intestinal malabsorption disorders).Both Folic Acid oral solution and Quiofic oral solution are specifically approved for this use in adults and pediatric patients of all ages.

Folic Acid injection is used when the condition is severe or when oral absorption may be impaired.

Read the full Folic Acid drug guide →
Clinical overview from our editorial drug guide for Folic Acid. 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
$0.051
Est. ASP / unit
$0.048 est.
Est. after 2% sequester
$0.050
HCPCS dosage
0.1 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 J1808 = 0.1 mg. 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 J1808 WITH EST. MEDICARE PAY

2 NDCs map to J1808. Bill units = how many HCPCS units one package represents. Est. pay / pkg = payment limit ($0.051/unit) × that package's bill units.
NDC (11-digit)DrugLabelerPackageStrength Bill units Est. pay / pkg NADAC / unit StatusSource
39822-1100-01 Folic Acid 5 mg/mL INJECTION, SOLUTION XGen 1 VIAL, MULTI-DOSE in 1 CARTON (39822-1100... 5 mg/mL 500 $25.50 — ● Active CMS + PDAC
63323-0184-10 Folic Acid 5 mg/mL INJECTION, SOLUTION Fresenius 1 VIAL, MULTI-DOSE in 1 CARTON (63323-184-... 5 mg/mL 500 $25.50 — ● 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 · 2026 (Q1)

Period
Total Part B spend
$341.31
Claims
386
Beneficiaries
117
Spend / beneficiary
$2.92
Spend / claim
$0.88
Trend by period
Where J1808 ranks among Part B drugs · 2026 (Q1) · neighbors ±5
Total spending — #792 of 824
#787 MEDROL* J7509 $471.06 #788 AFLURIA (90657)* 90657 $440.18 #789 AZITHROMYCIN* J0456 $419.17 #790 VALPROATE SODIUM J3379 $414.28 #791 HYDROXYZINE HCL J3410 $391.37 #792 FOLIC ACID J1808 $341.31 #793 METHOTREXATE* J8610 $338.59 #794 PHENYLEPHRINE HCL-0.... J2371 $334.54 #795 CALCIUM GLUCONATE-NA... J0613 $319.51 #796 FLUCONAZOLE-NACL J1450 $308.26 #797 METHADONE HCL J1230 $278.72
Total claims — #480 of 824
#475 ILUVIEN J7313 399 #476 COMPLETE SL PER SQ C... Q4270 396 #477 XOFIGO A9606 392 #478 LEUKINE J2820 392 #479 CLADRIBINE J9065 391 #480 FOLIC ACID J1808 386 #481 CYGNUS MATRIX, PER S... Q4199 381 #482 REVOSHIELD+ AMNIO, P... Q4289 376 #483 CLONIDINE HCL* J0735 372 #484 CYCLOPHOSPHAMIDE(J90... J9076 372 #485 PROVOCHOLINE J7674 371

Full breakdown by period (2)
PeriodTotal spendBeneficiariesClaims$/beneficiary$/claim
2026 (Q1) $341.31 117 386 $2.92 $0.88
2025 (Q1-Q4) $1K 205 919 $5.01 $1.12
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.

📈 Medicare Part B claims detail CMS PSPS · 2024

Calendar-year 2024 Medicare Part B fee-for-service activity for this HCPCS code, summed across all carriers, localities and specialties (CMS Physician/Supplier Procedure Summary). A “service” is one billed line/unit — not one claim — so counts run higher than claim counts.
Allowed charges
$972.51
Medicare paid
$753.85
Submitted services
20,833
Denial rate
23.2%
Allowed / service
$0.06
Submitted charges
$737.9K
Source: CMS Physician/Supplier Procedure Summary (PSPS), CY2024 — Medicare Part B carrier + DME fee-for-service claims (excludes Medicare Advantage). Figures are for the whole HCPCS code, which may cover uses beyond this drug. ⚠ CMS hides any figure covering fewer than 11 patients (a privacy rule), so totals — especially denials and low-volume codes — run a little low.

📊 What bills under J1808

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
Folic Acid 1
NDC products by labeler
XGen Pharmaceuticals DJB, Inc. 1

🗃️ 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)
2 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.

❓ J1808 billing FAQ

What is HCPCS code J1808?
J1808 is a HCPCS Level II J-code used to bill Inj, folic acid, 0.1 mg under Medicare Part B and most medical (not pharmacy) benefits.
What is the billing unit for J1808?
One unit of J1808 represents 0.1 MG. Report the number of units equal to the dose administered divided by 0.1 MG.
How many units of J1808 should I bill?
Divide the dose administered by the code's unit size (0.1 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 J1808?
The Medicare Part B payment limit is $0.051 per unit (Q3 2026), based on ASP + 6%. After the 2% sequester the effective payment is about $0.050 per unit. Payment limits are revised quarterly.
Which NDCs bill under J1808?
2 NDCs currently map to J1808 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 J1808 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.