ICD-10-CM 2027
ICD-10 code for Polysyndactyly
From the official ICD-10-CM alphabetic index entry “Polysyndactyly”. Page updated September 29, 2026.
About coding Polysyndactyly
The ICD-10-CM code for Polysyndactyly is Q70.4 (Polysyndactyly, unspecified).
Within Q70, choose Q70.4 (Polysyndactyly, unspecified) only when documentation doesn't support a more specific option: fused fingers (Q70.0), Webbed fingers (Q70.1), fused toes (Q70.2), Webbed toes (Q70.3) and unspecified (Q70.9).
Don't report Q70.4 together with the conditions in its Excludes1 note: specified syndactyly of hand and feet - code to specified conditions (Q70.0--Q70.3-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for Q70.4)
Common questions about Polysyndactyly ICD-10 codes
What is the ICD-10 code for Polysyndactyly?
- Q70.4 — Polysyndactyly, unspecified.
Is Q70.4 billable?
- Yes. Q70.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q70.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q70.4 as a principal diagnosis.
Is Q70.4 a CC or MCC?
- No. Q70.4 is neither a CC nor an MCC under MS-DRG v44.0.