J1557
J1557 – Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e · NDC Crosswalk & Billing Units
HCPCS Level II J-code · Medicare Part B drug billing
J-code
● 11 NDCs crosswalked per 500 MG $66.272/unit ASP+6%
📋 J1557 summary
J1557 is a HCPCS Level II J-code used to bill immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg, billed per 500 MG. 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 J1557: Gammaplex
Code J1557
Billing unit 500 MG Payment limit $66.272/unit NDC-Crosswalk 11
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 codeJ1557
DescriptorInjection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg
Billing unit500 MG
Payment limit / unit$66.272
Est. ASP / unit$62.521 est.
Mapped NDCs11
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
$66.272
Est. ASP / unit
$62.521 est.
Est. after 2% sequester
$64.947
HCPCS dosage
500 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.
Full HCPCS code details (official CMS record)
Long descriptionInjection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg
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 J1557 = 500 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 J1557 WITH EST. MEDICARE PAY
11 NDCs map to J1557. Bill units = how many HCPCS units one package represents. Est. pay / pkg = payment limit ($66.272/unit) × that package's bill units.
| NDC (11-digit) | Drug | Labeler | Package | Strength | Bill units | Est. pay / pkg | NADAC / unit | Status | Source |
|---|---|---|---|---|---|---|---|---|---|
| 64208-8234-06 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/100mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8234-6)... | 5 g/100mL | 10 | $662.72 | — | ● Active | CMS + PDAC |
| 64208-8234-07 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/100mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8234-7)... | 5 g/100mL | 20 | $1,325.44 | — | ● Active | CMS + PDAC |
| 64208-8234-08 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/100mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8234-8)... | 5 g/100mL | 40 | $2,650.88 | — | ● Active | CMS ASP |
| 64208-8235-05 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/50mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8235-5)... | 5 g/50mL | 10 | $662.72 | — | ● Active | CMS + PDAC |
| 64208-8235-06 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/50mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8235-6)... | 5 g/50mL | 20 | $1,325.44 | — | ● Active | CMS + PDAC |
| 64208-8235-07 | Gammaplex HUMAN IMMUNOGLOBULIN G 5 g/50mL SOLUTION | Bio | 1 BOTTLE, GLASS in 1 CARTON (64208-8235-7)... | 5 g/50mL | 40 | $2,650.88 | — | ● Active | CMS + PDAC |
| 64208-8235-01 | GAMMAPLEX 10% (INNER PACK NDC,PF) 100 MG/1 ML | Unknown | — | — | 0.2 | $13.25 | — | — | PDAC |
| 64208-8235-02 | GAMMAPLEX 10% (INNER PACK NDC,PF) 100 MG/1 ML | Unknown | — | — | 0.2 | $13.25 | — | — | PDAC |
| 64208-8235-03 | GAMMAPLEX 10% (INNER PACK NDC,PF) 100 MG/1 ML | Unknown | — | — | 0.2 | $13.25 | — | — | PDAC |
| 64208-8234-02 | GAMMAPLEX (1X100ML,SINGLE USE) 5 GM/ 100 ML | Unknown | — | — | 0.1 | $6.63 | — | — | PDAC |
| 64208-8234-03 | GAMMAPLEX (1X200ML,SINGLE USE) 10 GM/ 200 ML | Unknown | — | — | 0.1 | $6.63 | — | — | 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)
Period
Total Part B spend
$3.44M
Claims
711
Beneficiaries
251
Spend / beneficiary
$13,691.81
Spend / claim
$4,833.54
Trend by period
Where J1557 ranks among Part B drugs · 2026 (Q1) · neighbors ±5
Total spending — #274 of 824
#269
BACLOFEN(J0475)* J0475
$3.51M
#270
ALBUKED-25(P9047)* P9047
$3.5M
#271
ACTIVASE* J2997
$3.49M
#272
BETAMETHASONE SOD PH... J0702
$3.47M
#273
LUPRON DEPOT-PED* J1950
$3.45M
#274
GAMMAPLEX J1557
$3.44M
#275
BCG (TICE STRAIN)(J9... J9030
$3.43M
#276
DURYSTA J7351
$3.41M
#277
KOVALTRY J7211
$3.36M
#278
SYLVANT J2860
$3.35M
#279
XCEED TL MATRIX PER... Q4353
$3.33M
Total claims — #410 of 824
#405
ZUSDURI J9282
747
#406
FOSAPREPITANT DIMEGL... J1456
743
#407
PURAPLY XT 1 SQ CM** Q4197
731
#408
ACETAMINOPHEN(J0131) J0131
726
#409
ENGERIX-B ADULT(9074... 90740
724
#410
GAMMAPLEX J1557
711
#411
AFFINITY1 SQUARE CM*... Q4159
710
#412
ALTUVIIIO J7214
704
#413
COLUMVI J9286
689
#414
TECENTRIQ HYBREZA J9024
688
#415
HYPERRAB 90375
686
Top Medicare Part B drugs by the selected metric. Click any drug to open its J-code page. Source: CMS Medicare Quarterly Part B Spending by Drug.
Full breakdown by period (2)
| Period | Total spend | Beneficiaries | Claims | $/beneficiary | $/claim |
|---|---|---|---|---|---|
| 2026 (Q1) | $3.44M | 251 | 711 | $13,691.81 | $4,833.54 |
| 2025 (Q1-Q4) | $14.7M | 306 | 3,238 | $48,053.33 | $4,541.17 |
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
$15.01M
Medicare paid
$11.7M
Submitted services
449,912
Denial rate
44.3%
Allowed / service
$59.91
Submitted charges
$151.22M
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 J1557
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
NDC products by labeler
🗃️ 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 + DMEPDAC (PDAC)
11 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.
❓ J1557 billing FAQ
What is HCPCS code J1557?
J1557 is a HCPCS Level II J-code used to bill Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg under Medicare Part B and most medical (not pharmacy) benefits.
What is the billing unit for J1557?
One unit of J1557 represents 500 MG. Report the number of units equal to the dose administered divided by 500 MG.
How many units of J1557 should I bill?
Divide the dose administered by the code's unit size (500 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 J1557?
The Medicare Part B payment limit is $66.272 per unit (Q3 2026), based on ASP + 6%. After the 2% sequester the effective payment is about $64.947 per unit. Payment limits are revised quarterly.
Which NDCs bill under J1557?
11 NDCs currently map to J1557 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 J1557 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.