R20-R23 — Symptoms and signs involving the skin and subcutaneous tissue
ICD-10-CM codes R20-R23 cover symptoms and signs involving the skin and subcutaneous tissue, within symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified. The block holds 31 codes across 4 categories, of which 26 are billable and 5 are header codes that cannot be submitted on a claim.
What else to watch in R20-R23
- 4 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.
- 23 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.