ICD-10-CM 2027
ICD-10 code for hypochondriacal reaction
From the official ICD-10-CM alphabetic index entry “Reaction › hypochondriacal”. Page updated September 29, 2026.
About coding hypochondriacal reaction
The ICD-10-CM code for hypochondriacal reaction is F45.20 (Hypochondriacal disorder, unspecified).
Within F45.2, choose F45.20 (Hypochondriacal disorder, unspecified) only when documentation doesn't support a more specific option: Hypochondriasis (F45.21), body dysmorphic disorder (F45.22) and other hypochondriacal disorders (F45.29).
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 882 (Neuroses Except Depressive, relative weight 0.9952), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about hypochondriacal reaction ICD-10 codes
What is the ICD-10 code for hypochondriacal reaction?
- F45.20 — Hypochondriacal disorder, unspecified.
Is F45.20 billable?
- Yes. F45.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F45.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F45.20 as a principal diagnosis.
Is F45.20 a CC or MCC?
- No. F45.20 is neither a CC nor an MCC under MS-DRG v44.0.