C22.7 — Other specified carcinomas of liver
ICD-10-CM
Prior Authorization
No Prior Auth Required
Code is covered without prior authorization (high confidence)
Documentation Required
- Use CPT code 81540 on the claim when billing for Cancer TYPE ID.
- Enter '1' in the Days/Unit field on the claim for this test.
- Submit the required test identifier information using SV101-7 or SV202-7 (SV202-7 preferred) or via the NTE field if needed.
- Include the appropriate DEX Z-Code identifier adjacent to the CPT code in the claim comment/narrative field for Part B claims (Loop 2400 or SV101-7 for 5010A1 837P; Box 19 for paper claims).
Key Coverage Criteria
- Bill Cancer TYPE ID using CPT code 81540 (mRNA gene expression assay of 92 genes) for evaluation of tumors of unknown origin.
- Non-invasive vascular studies (duplex scan, physiologic studies, plethysmography, transcranial Doppler) are covered when ordered by the treating or consulting practitioner and medically necessary to evaluate, diagnose, or manage vascular disease.
- Initial autogenous access vessel mapping should be billed with HCPCS codes 93985 or 93986 and is covered when medically necessary for surgical planning.
- Subsequent autogenous access mapping may be billed with CPT codes 93970 or 93971 when clinically indicated.
- Pre-surgical radial artery conduit mapping may be performed and accompanied by vein-mapping when either study shows insufficient conduits for multiple bypass procedures.
- Immediate post-operative studies of an access or bypass site are covered if pulses are lost, become equivocal, or the patient develops signs or symptoms of ischemia suggesting need for repeat intervention.
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