ICD-10-CM 2027
ICD-10 code for Hypochondria
From the official ICD-10-CM alphabetic index entry “Hypochondria, hypochondriac, hypochondriasis (reaction)”. Page updated September 29, 2026.
About coding Hypochondria
The ICD-10-CM code for Hypochondria is F45.21 (Hypochondriasis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on F45.21.
Within F45.2 (hypochondriacal disorders), F45.21 is specifically for Hypochondriasis. Related codes cover hypochondriacal disorder, unspecified (F45.20), 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.
More specific Hypochondria codes (official index)
- sleep F51.03 — Paradoxical insomnia
Common questions about Hypochondria ICD-10 codes
What is the ICD-10 code for Hypochondria?
- F45.21 — Hypochondriasis. More specific codes apply when the documentation supports them: F51.03.
What is the ICD-10 code for sleep hypochondria?
- F51.03 — Paradoxical insomnia.
Is F45.21 billable?
- Yes. F45.21 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F45.21 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F45.21 as a principal diagnosis.
Is F45.21 a CC or MCC?
- No. F45.21 is neither a CC nor an MCC under MS-DRG v44.0.