ICD-10 code for diaphragm congenital deformity

The ICD-10-CM code for diaphragm congenital deformity is Q79.1 (Other congenital malformations of diaphragm). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q79.1.

Within Q79, choose Q79.1 (Other congenital malformations of diaphragm) only when documentation doesn't support a more specific option: congenital diaphragmatic hernia (Q79.0), Exomphalos (Q79.2), gastroschisis (Q79.3), prune belly syndrome (Q79.4), other congenital malformations of abdominal wall (Q79.5), Ehlers-Danlos syndromes (Q79.6), other congenital malformations of musculoskeletal system (Q79.8) and congenital malformation of musculoskeletal system, unspecified (Q79.9).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 205 (Other Respiratory System Diagnoses with MCC, relative weight 1.8244) and DRG 206 (Other Respiratory System Diagnoses without MCC, relative weight 0.9257), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.