M1194 Documentation of medical reason(s) surgical pathology reports did not contain impression or conclusion of or recommendation for testing of mmr by immunohistochemistry, msi by dna-based testing status, or both tests were not included (e.g., patient will not be treated with checkpoint inhibitor therapy, no residual carcinoma is present in the sample [tissue exhausted or status post neoadjuvant treatment], insufficient tumor for testing)
Short descriptor: Med rsn no imp/con mmr/msi
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M1194 is the HCPCS Level II code for Documentation of medical reason(s) surgical pathology reports did not contain impression or conclusion of or recommendation for testing of mmr by immunohistochemistry, msi by dna-based testing status, or both tests were not included (e.g., patient will not be treated with checkpoint inhibitor therapy, no residual carcinoma is present in the sample [tissue exhausted or status post neoadjuvant treatment], insufficient tumor for testing) (2026). It belongs to Section M — Medical Services. Under Medicare, its coverage status is: Carrier judgment. Part B pricing methodology: Not separately priced by Part B.
Classification & CMS Attributes
- Section
- M: Medical Services
- Medicare Coverage
- Carrier judgment (code C)
- Part B Pricing
- Not separately priced by Part B (indicator 00)
- Type of Service
- Medical care
- Effective Date
- 2023-01-01
- 2026 Maintenance
- No change this year
References
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Reference M1194 with the canonical source and edition:
M1194 — Documentation of medical reason(s) surgical pathology reports did not contain impression or conclusion of or recommendation for testing of mmr by immunohistochemistry, msi by dna-based testing status, or both tests were not included (e.g., patient will not be treated with checkpoint inhibitor therapy, no residual carcinoma is present in the sample [tissue exhausted or status post neoadjuvant treatment], insufficient tumor for testing). ICD-10 Coding Pro (HCPCS Level II 2026). https://icd10codingpro.com/hcpcs-codes/M1194
Canonical URL: https://icd10codingpro.com/hcpcs-codes/M1194