R40.2440 — Other coma, without documented Glasgow coma scale score, or with partial score reported, unspecified time
Is R40.2440 billable?
Yes, but R40.2440 is an unspecified code. R40.2440 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, R40.2440 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting R40.2440.
R40.2440 at a glance
| Code | R40.2440 |
|---|---|
| Description | Other coma, without documented Glasgow coma scale score, or with partial score reported, unspecified time |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "0" | unspecified time |
What does the 7th character "0" mean in R40.2440?
In R40.2440, the 7th character 0 means unspecified time. The 7th character is required for R40.2440 to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
What Medicare edits apply to R40.2440?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name R40.2440 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does R40.2440 group to?
R40.2440 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
How is R40.2440 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under R40.244, the nearest indexed parent of R40.2440. Use them to find the family, then select the specific code.
- Coma › specified NEC, without documented Glasgow coma scale score, or with partial Glasgow coma scale score reported
Excludes1 — never code together — inherited from R40
The conditions below can never be reported together with R40.2440 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first — inherited from R40.2
The underlying condition below must be sequenced before R40.2440. R40.2440 describes a manifestation and cannot be the principal or first-listed diagnosis.
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R40.2440, but a patient may have both at the same time. When documentation supports it, R40.2440 and the excluded code may both be reported.
Excludes2 — not included here — inherited from R40-R46
The conditions below are not part of R40.2440, but a patient may have both at the same time. When documentation supports it, R40.2440 and the excluded code may both be reported.
- symptoms and signs constituting part of a pattern of mental disorder (F01-F99)
How long has R40.2440 existed?
R40.2440 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.