R40.1 — Stupor
R40.1 is a billable, specific ICD-10-CM code for stupor. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Catatonic stupor
- Semicoma
Other codes that can never be billed with R40.1
These codes carry an Excludes1 note pointing at R40.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R40.1 alone.
Risk adjustment
R40.1 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
R40.1 is named in 29 Medicare coverage policies — 29 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54799Billing and Coding: Urine Drug Testing
- A55001Billing and Coding: Urine Drug Testing
- A56612Billing and Coding: CT of the Head
- A56614Billing and Coding: Psychiatric Inpatient Hospitalization
How R40.1 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 R40.1.
- Clouded state
- Semicoma
- Stupor(catatonic)
- Catatonic›stupor
Related codes at this level
Codes that share R40. If R40.1 is not quite right, the correct code is usually one of these.
Questions about R40.1
- Is R40.1 a billable ICD-10-CM code?
- Yes. R40.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R40.1 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).
- What cannot be coded together with R40.1?
- R40.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.