R45.84 — Anhedonia
R45.84 is a billable, specific ICD-10-CM code for anhedonia. It is valid for submission on a claim.
Other codes that can never be billed with R45.84
These codes carry an Excludes1 note pointing at R45.84. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R45.84 alone.
- R45.3Demoralization and apathy
Risk adjustment
R45.84 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
R45.84 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
- A57130Billing and Coding: Psychiatric Codes
How R45.84 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 R45.84.
- Anhedonia
Related codes at this level
Codes that share R45.8. If R45.84 is not quite right, the correct code is usually one of these.
Questions about R45.84
- Is R45.84 a billable ICD-10-CM code?
- Yes. R45.84 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R45.84 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 cognition, perception, emotional state and behavior (R40-R46).