CPT vs HCPCS Level II
CPT (HCPCS Level I) is the AMA five-digit code set for physician services. HCPCS Level II is the CMS alphanumeric set for supplies, drugs, and ambulance.
Last reviewed May 24, 2026
Side by side
CPT (HCPCS Level I)
American Medical Association code set for physician and other professional services. Five-digit numeric codes (e.g., 99213, 27447).
AMA CPT 2026- Owned and maintained by the AMA.
- Annual update cycle.
- Categories I, II (performance), III (emerging tech).
HCPCS Level II
CMS-maintained alphanumeric code set for items and services not captured by CPT — DME, drugs administered, ambulance services, orthotics/prosthetics, and Medicare-specific add-ons.
HCPCS Level II 2026- One alpha character + four digits (e.g., J3490, G2211, A6549).
- Updated by CMS quarterly (drugs) and annually.
When to use CPT (HCPCS Level I)
- Office visit, surgery, anesthesia, radiology professional service.
When to use HCPCS Level II
- Injectable drug given in office (J-code).
- Wheelchair, walker, or other DME (E-codes, K-codes).
- Medicare-specific add-on (G2211).
- Ambulance services (A-codes).
Common mistakes
- Searching CPT for a J-code drug (it lives in HCPCS Level II).
- Missing a HCPCS Level II add-on like G2211 because the workflow only checks CPT.
- Mixing up Level III HCPCS local codes (largely retired) with Level II national codes.
Sources
- AMA CPThttps://www.ama-assn.org/practice-management/cpt
- CMS — HCPCS Level II Code Sethttps://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system
Related
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This comparison is a research aid for billing and compliance staff. It does not provide legal, medical, or financial advice and does not replace counsel. References cited link to primary sources at CMS, HHS, OCR, eCFR, NIST, and the relevant payer or state regulator. Last reviewed May 24, 2026.