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

HCPCS modifier › N codes › N1

N1

Group 1 oxygen coverage criteria met

ValidHCPCS Level II modifier.

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

Valid FY2023 onwards.

At a glance

Code: N1
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.

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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.

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