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CP HCPCS Level II modifier: Adjunctive service related to a procedure assigned to a comprehensive ambulatory payment classification (c-apc) procedure, but reported on a different claim

CMS terminated CP: its last date of service was Dec 31, 2017. It stays here for looking up older claims; newer services need a current code.

Official description

CP

Adjunctive service related to a procedure assigned to a comprehensive ambulatory payment classification (c-apc) procedure, but reported on a different claim

Short description: C-apc adjunctive service

HCPCS · United States

Medicare details

The indicators CMS publishes with CP in its October 2026 file. They describe Medicare’s handling, not another payer’s.

Medicare coverage
Carrier judgment
Added
Jan 1, 2016
Terminated after
Dec 31, 2017

Where CP sits

  1. 1GroupHCPCS modifiers
  2. 2Terminated CPAdjunctive service related to a procedure assigned to a comprehensive ambulatory payment classification (c-apc) procedure, but reported on a different claim

Source and release

Data release
HCPCS Level II · October 2026
Effective date
Oct 1, 2026
Publisher
CMS

This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See CP in the CMS source

Frequently asked questions

Is HCPCS code CP still valid?

No. CMS terminated CP; its last date of service was Dec 31, 2017. It is listed for looking up services from before then. Use a current code for newer services.

Where is CP in the HCPCS Level II list?

CP is listed under Modifiers.

Does Medicare cover CP?

CMS lists CP’s Medicare coverage as “Carrier judgment”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.

Which HCPCS Level II release does this page use?

It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside CP

CJAt least 20 percent but less than 40 percent impaired, limited or restrictedCKAt least 40 percent but less than 60 percent impaired, limited or restrictedCLAt least 60 percent but less than 80 percent impaired, limited or restrictedCMAt least 80 percent but less than 100 percent impaired, limited or restrictedCN100 percent impaired, limited or restrictedCOOutpatient occupational therapy services furnished in whole or in part by an occupational therapy assistantCQOutpatient physical therapy services furnished in whole or in part by a physical therapist assistantCRCatastrophe/disaster relatedCSCost-sharing waived for specified covid-19 testing-related services that result in and order for or administration of a covid-19 test and/or used for cost-sharing waived…CTComputed tomography services furnished using equipment that does not meet each of the attributes of the national electrical manufacturers association (nema) xr-29-2013 standardDAOral health assessment by a licensed health professional other than a dentistE1Upper left, eyelid