Thumb Hypoplasia Grade 3b C5970290
A congenital hand difference where the thumb is severely underdeveloped (a specific grade). It affects individuals with this thumb abnormality. Treatment typically involves surgical reconstruction to enhance hand function.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- moderate
- Chronic
- true
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy