ICD-10-CM ICD-10-PCS HCPCS Modifiers Check Retired Releases Guides

HCPCS modifier › F codes › F4

F4

Left hand, fifth digit

ValidHCPCS Level II modifier.

Valid for claims with a date of service in the current code year.

Valid FY2023 onwards.

At a glance

Code: F4
System: HCPCS modifier
Status: Valid
Valid: FY2023 onwards
In the code set: FY2023 onwards

On this page

Source

HCPCS modifier, October 2026 quarterly release, published by the Centers for Medicare and Medicaid Services (CMS).

CMS republishes this code set every quarter, four times a year.

How this site is edited

About Contact Editorial Policy Medical Disclaimer Privacy Policy Terms of Service

ICD-10-CM and ICD-10-PCS 2027 code set, effective October 1, 2026. Code descriptions are sourced from CMS and the NCHS and are in the public domain.

Reference information only - not medical, coding or billing advice. ICD10 Detail is independent and is not affiliated with or endorsed by CMS, the NCHS, the AMA or any government agency.

© 2026 ICD10 Detail.