C73-C75 — Malignant neoplasms of thyroid and other endocrine glands
ICD-10-CM codes C73-C75 cover malignant neoplasms of thyroid and other endocrine glands, within neoplasms. The block holds 23 codes across 3 categories, of which 18 are billable and 5 are header codes that cannot be submitted on a claim.
Risk adjustment in C73-C75
0 codes in this block map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded. Under-coding here is money left on the table; over-coding here is what audits are for.
- HCC 22 Bladder, Colorectal, and Other Cancers
- HCC 23 Prostate, Breast, and Other Cancers and Tumors
- HCC 20 Lung and Other Severe Cancers
What else to watch in C73-C75
- 6 codes are laterality-specific. They come in left and right pairs, and the pair is mutually exclusive on a single site: coding both without a bilateral code is a contradiction a scrubber should catch before the payer does.
- 18 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.