MCMCB Pro
R83.1

R83.1Abnormal level of hormones in cerebrospinal fluid

Billable / specific codeICD-10-CM

R83.1 is a billable, specific ICD-10-CM code for abnormal level of hormones in cerebrospinal fluid. It is valid for submission on a claim.

Risk adjustment

R83.1 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

R83.1 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.

  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How R83.1 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 R83.1.

  • Abnormal, abnormality, abnormalitiescerebrospinal fluidhormones

Related codes at this level

Codes that share R83. If R83.1 is not quite right, the correct code is usually one of these.

Questions about R83.1

Is R83.1 a billable ICD-10-CM code?
Yes. R83.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R83.1 sit in the tabular list?
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.