Is Q70.4 a billable ICD-10-CM code?

Yes. Q70.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q70.4 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).

What cannot be coded together with Q70.4?

Q70.4 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

Q70.4

Q70.4 — Polysyndactyly, unspecified

Billable / specific codeICD-10-CMPOA exempt

Q70.4 is a billable, specific ICD-10-CM code for polysyndactyly, unspecified. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

specified syndactyly of hand and feet - code to specified conditions (Q70.0- -Q70.3-)

Other codes that can never be billed with Q70.4

These codes carry an Excludes1 note pointing at Q70.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q70.4 alone.

Q74Other congenital malformations of limb(s)

Risk adjustment

Q70.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How Q70.4 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q70.4.

Polysyndactyly

Code history

Q70.4 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Q70. If Q70.4 is not quite right, the correct code is usually one of these.

Questions about Q70.4

Is Q70.4 a billable ICD-10-CM code?: Yes. Q70.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q70.4 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).
What cannot be coded together with Q70.4?: Q70.4 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.