J1643 HCPCS Level II Code: Injection, heparin sodium (pfizer), not therapeutically equivalent to j1644, per 1000 units
Coding at a Glance
- Drug products
- 1 NDC product
Medicare Coverage & Payment
- CMS short descriptor: Inj heparin, pfizer, 1000u
- Medicare coverage: Special coverage instructions apply (CMS coverage code D)
- Payment category: Drugs (pricing indicator 51)
- BETOS: O1E — Other drugs
- Last CMS action effective: January 1, 2024
Source: CMS HCPCS Level II release. Coverage codes indicate how Medicare treats the code, not whether a specific claim will be paid; payer policy and documentation still govern.
Change history
- January 1, 2023Added to the code setInjection, heparin sodium (pfizer), not therapeutically equivalent to j1644, per 1000 units
Drug products (NDC)
CMS ASP NDC-HCPCS Crosswalk · 2026 Q3
Medicare Part B payment limit (ASP + 6%): $1.71
Related Codes
Same drug, other billing codes
CMS's ASP crosswalk lists these HCPCS codes for the same drug.
From the CMS ASP NDC-HCPCS Crosswalk and Part B Payment Limit File. Payment limits apply per HCPCS billing code, not per package.
Contextual Map
Every relationship of J1643 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Nearest codes (21)
- J1600 — Injection, gold sodium thiomalate, up to 50 mg[Sibling]
- J1602 — Injection, golimumab, 1 mg, for intravenous use[Sibling]
- J1610 — Injection, glucagon hydrochloride, per 1 mg[Sibling]
- J1611 — Injection, glucagon hydrochloride (fresenius kabi), not therapeutically equivalent to j1610, per 1 mg[Sibling]
- J1612 — Injection, glucagon (gvoke), 0.01 mg[Sibling]
- J1620 — Injection, gonadorelin hydrochloride, per 100 mcg[Sibling]
- J1626 — Injection, granisetron hydrochloride, 100 mcg[Sibling]
- J1627 — Injection, granisetron, extended-release, 0.1 mg[Sibling]
- and 13 more
Change history
- January 1, 2023 — Added to the code set [Change history]
Nearest Codes in This Family
Official HCPCS Level II classifications closest to J1643 in its code family, with their registry titles.
- J1630 — Injection, haloperidol, up to 5 mg
- J1631 — Injection, haloperidol decanoate, per 50 mg
- J1632 — Injection, brexanolone, 1 mg
- J1640 — Injection, hemin, 1 mg
- J1642 — Injection, heparin sodium, (heparin lock flush), per 10 units
- J1644 — Injection, heparin sodium, per 1000 units
- J1645 — Injection, dalteparin sodium, per 2500 iu
- J1650 — Injection, enoxaparin sodium, 10 mg
- J1652 — Injection, fondaparinux sodium, 0.5 mg
- J1655 — Injection, tinzaparin sodium, 1000 iu