ICD-10-CM 2027
ICD-10 code for anesthesia
From the official ICD-10-CM alphabetic index entry “Anesthesia, anesthetic”. Page updated September 29, 2026.
About coding anesthesia
The ICD-10-CM code for anesthesia is R20.0 (Anesthesia of skin). The official index lists 13 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R20.0.
Within R20 (disturbances of skin sensation), R20.0 is specifically for anesthesia of skin. Related codes cover hypoesthesia of skin (R20.1), Paresthesia of skin (R20.2), Hyperesthesia (R20.3), other disturbances of skin sensation (R20.8) and unspecified disturbances of skin sensation (R20.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific anesthesia codes (official index)
- complication or reaction NEC T88.59 — Other complications of anesthesia
- due to
- correct substance properly administered
- overdose or wrong substance given
- unintended awareness under general anesthesia during procedure T88.53 — Unintended awareness under general anesthesia during procedure
- personal history of Z92.84 — Personal history of unintended awareness under general anesthesia
- cornea H18.81 — Anesthesia and hypoesthesia of cornea
- dissociative F44.6 — Conversion disorder with sensory symptom or deficit
- functional (hysterical) F44.6 — Conversion disorder with sensory symptom or deficit
- hyperesthetic, thalamic G89.0 — Central pain syndrome
- hysterical F44.6 — Conversion disorder with sensory symptom or deficit
- local skin lesion R20.0 — Anesthesia of skin
- sexual (psychogenic) F52.1 — Sexual aversion disorder
- shock (due to) T88.2 — Shock due to anesthesia
- skin R20.0 — Anesthesia of skin
- testicular N50.9 — Disorder of male genital organs, unspecified
Common questions about anesthesia ICD-10 codes
What is the ICD-10 code for anesthesia?
- R20.0 — Anesthesia of skin. More specific codes apply when the documentation supports them: T88.59, T88.53, Z92.84, H18.81 and others below.
What is the ICD-10 code for complication or reaction nec anesthesia?
- T88.59 — Other complications of anesthesia (header code; choose a more specific subcode).
What is the ICD-10 code for cornea anesthesia?
- H18.81 — Anesthesia and hypoesthesia of cornea (header code; choose a more specific subcode).
What is the ICD-10 code for dissociative anesthesia?
- F44.6 — Conversion disorder with sensory symptom or deficit.
What is the ICD-10 code for functional anesthesia?
- F44.6 — Conversion disorder with sensory symptom or deficit.
What is the ICD-10 code for hysterical anesthesia?
- F44.6 — Conversion disorder with sensory symptom or deficit.
What is the ICD-10 code for local skin lesion anesthesia?
- R20.0 — Anesthesia of skin.
Is R20.0 billable?
- Yes. R20.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R20.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R20.0 as a principal diagnosis.
Is R20.0 a CC or MCC?
- No. R20.0 is neither a CC nor an MCC under MS-DRG v44.0.