R29.90 — Unspecified symptoms and signs involving the nervous system
R29.90 is a billable, specific ICD-10-CM code for unspecified symptoms and signs involving the nervous system. It is valid for submission on a claim.
Risk adjustment
R29.90 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
R29.90 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56771Billing and Coding: Special Electroencephalography
How R29.90 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R29.90.
- Symptoms NEC›involving›nervous system
Related codes at this level
Codes that share R29.9. If R29.90 is not quite right, the correct code is usually one of these.
Questions about R29.90
- Is R29.90 a billable ICD-10-CM code?
- Yes. R29.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R29.90 sit in the tabular list?
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the nervous and musculoskeletal systems (R25-R29).