Is Q31.1 a billable ICD-10-CM code?

Yes. Q31.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q31.1 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the respiratory system (Q30-Q34).

What cannot be coded together with Q31.1?

Q31.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q31.1 (Q31) and apply to it just the same.

Q31.1

Q31.1 — Congenital subglottic stenosis

Billable / specific codeICD-10-CMPOA exempt

Q31.1 is a billable, specific ICD-10-CM code for congenital subglottic stenosis. It is valid for submission on a claim.

Excludes1 inherited from the categories above Q31.1

These are not written on Q31.1, but they bind it: a note on a category applies to every code beneath it. Billing Q31.1 with anything listed here is a denial.

Written on Q31 — Congenital malformations of larynx

congenital laryngeal stridor NOS (P28.89)

Risk adjustment

Q31.1 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.

Medicare coverage

Q31.1 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
A56868Billing and Coding: Outpatient Speech Language Pathology
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How Q31.1 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 Q31.1.

Stenosis, stenotic›subglottic›congenital
Constriction›larynx›congenital›subglottic
Stenosis, stenotic›larynx›congenital NEC›subglottic
Stricture›larynx›congenital NEC›subglottic

Code history

Q31.1 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 Q31. If Q31.1 is not quite right, the correct code is usually one of these.

Questions about Q31.1

Is Q31.1 a billable ICD-10-CM code?: Yes. Q31.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q31.1 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the respiratory system (Q30-Q34).
What cannot be coded together with Q31.1?: Q31.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q31.1 (Q31) and apply to it just the same.