Is Q79.1 a billable ICD-10-CM code?

Yes. Q79.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q79.1 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).

Q79.1

Q79.1 — Other congenital malformations of diaphragm

Billable / specific codeICD-10-CMPOA exempt

Q79.1 is a billable, specific ICD-10-CM code for other congenital malformations of diaphragm. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Absence of diaphragm
Congenital malformation of diaphragm NOS
Eventration of diaphragm

Other codes that can never be billed with Q79.1

These codes carry an Excludes1 note pointing at Q79.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q79.1 alone.

J98.6Disorders of diaphragm

Risk adjustment

Q79.1 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

Q79.1 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

How Q79.1 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 Q79.1.

Abnormal, abnormality, abnormalities›apertures, congenital, diaphragm
Absence›diaphragm, congenital(with hernia)
Agenesis›diaphragm(with hernia)
Anomaly, anomalous›diaphragm NEC(apertures)
Deformity›diaphragm(congenital)
Elevated, elevation›diaphragm, congenital
Enlargement, enlarged›apertures of diaphragm(congenital)
Eventration›diaphragm(congenital)
High›diaphragm(congenital)
Hypertrophy, hypertrophic›esophageal hiatus(congenital)
Hypertrophy, hypertrophic›hiatus(esophageal)
Malformation›diaphragm

Related codes at this level

Codes that share Q79. If Q79.1 is not quite right, the correct code is usually one of these.

Questions about Q79.1

Is Q79.1 a billable ICD-10-CM code?: Yes. Q79.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q79.1 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).