AutoICD API

R40.2

Non-billable

Coma

Coma

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

R40-R46

Parent Code

R40

Child Codes

6

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • neonatal coma (P91.5)
  • somnolence, stupor and coma in diabetes (E08-E13)
  • somnolence, stupor and coma in hepatic failure (K72.-)
  • somnolence, stupor and coma in hypoglycemia (nondiabetic) (E15)

Excludes 2

Conditions not included here, but the patient may have both

  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)
  • symptoms and signs constituting part of a pattern of mental disorder (F01-F99)

Code First

The underlying condition must be sequenced before this code

  • any associated:
  • fracture of skull (S02.-)
  • intracranial injury (S06.-)

Child Codes (6)

R40.20

Unspecified coma

BillableR40.21

Coma scale, eyes open

R40.22

Coma scale, best verbal response

R40.23

Coma scale, best motor response

R40.24

Glasgow coma scale, total score

R40.2A

Nontraumatic coma due to underlying condition

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code R40.2?

ICD-10-CM code R40.2 represents "Coma". It is a non-billable header code — use a more specific child code for billing purposes.

Is R40.2 a billable code?

No, R40.2 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under R40.2.

What chapter is R40.2 in?

R40.2 is in Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (codes R00-R99).

What codes cannot be used with R40.2?

R40.2 has Excludes1 notes indicating codes that cannot be used together with it, including: neonatal coma (P91.5); somnolence, stupor and coma in diabetes (E08-E13); somnolence, stupor and coma in hepatic failure (K72.-); and 1 more.

What are the subcategories under R40.2?

R40.2 has 6 child codes, including: R40.20 (Unspecified coma), R40.21 (Coma scale, eyes open), R40.22 (Coma scale, best verbal response), R40.23 (Coma scale, best motor response), and 2 more.

What are the UMLS CUIs for R40.2?

R40.2 is linked to 1 UMLS Concept Unique Identifier: C0009421. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.