Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

MS-DRG 564 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC (MDC 08)
MS-DRG 565 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC (MDC 08)
MS-DRG 566 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC (MDC 08)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Congenital malformation of knee is a billable ICD-10-CM diagnosis code (Q74.1).

Sequencing, inclusion, and exclusion notes published for Q74.1 in the official ICD-10-CM tabular list.

Alternative terms the tabular list files under this code.

Conditions that can never be reported with this code; the two are mutually exclusive.

Official ICD-10-CM classifications closest to Q74.1 in its code family, with their registry titles.

Q74 — Other congenital malformations of limb(s)
Q74.0 — Other congenital malformations of upper limb(s), including shoulder girdle
Q74.2 — Other congenital malformations of lower limb(s), including pelvic girdle
Q74.3 — Arthrogryposis multiplex congenita
Q74.8 — Other specified congenital malformations of limb(s)
Q74.9 — Unspecified congenital malformation of limb(s)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.