M1183 HCPCS Level II code: Documentation of immune checkpoint inhibitor therapy held and corticosteroids or immunosuppressants prescribed or administered
M1183 is the HCPCS code for “Documentation of immune checkpoint inhibitor therapy held and corticosteroids or immunosuppressants prescribed or administered” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
M1183Documentation of immune checkpoint inhibitor therapy held and corticosteroids or immunosuppressants prescribed or administered
Short description: Doc imm ckpt inhib hld
HCPCS · United States
Medicare details
The indicators CMS publishes with M1183 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)
- Type of service
- Medical care
- BETOS category
- Undefined codes
- Added
- Jan 1, 2023
Where M1183 sits
- 1M codesMedical services and quality measures
- 2Active code M1183Documentation of immune checkpoint inhibitor therapy held and corticosteroids or immunosuppressants prescribed or administered
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.
Frequently asked questions
What does HCPCS code M1183 mean?
M1183 is the HCPCS code for “Documentation of immune checkpoint inhibitor therapy held and corticosteroids or immunosuppressants prescribed or administered” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover M1183?
CMS lists M1183’s Medicare coverage as “Carrier judgment” and its pricing as “Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)”. 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 M1183
All M codesM1177Patient received any pneumococcal conjugate or polysaccharide vaccine on or after their 19th birthday and before the end of the measurement periodM1178Documentation of medical reason(s) for not administering pneumococcal vaccine (e.g., prior anaphylaxis due to the pneumococcal vaccine)M1179Patient did not receive any pneumococcal conjugate or polysaccharide vaccine, on or after their 19th birthday and before or during measurement periodM1180Patients on immune checkpoint inhibitor therapyM1181Grade 2 or above diarrhea and/or grade 2 or above colitisM1182Patients not eligible due to pre-existing inflammatory bowel disease (ibd) (e.g., ulcerative colitis, crohn's disease)M1184Documentation of medical reason(s) for not prescribing or administering corticosteroid or immunosuppressant treatment (e.g., allergy, intolerance, infectious etiology, pancreatic…M1185Documentation of immune checkpoint inhibitor therapy not held and/or corticosteroids or immunosuppressants prescribed or administered was not performed, reason not givenM1186Patients who have an order for or are receiving hospice or palliative careM1187Patients with a diagnosis of end stage renal disease (esrd)M1188Patients with a diagnosis of chronic kidney disease (ckd) stage 5M1189Documentation of a kidney health evaluation defined by an estimated glomerular filtration rate (egfr) and urine albumin-creatinine ratio (uacr) performed