ICDcodes.org
FY2027

Q74.1 — Congenital malformation of knee

Billable

Is Q74.1 billable?

Yes — Q74.1 is billable for FY2027. Q74.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q74.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.

Q74.1 at a glance

CodeQ74.1
DescriptionCongenital malformation of knee
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does Q74.1 group to?

Q74.1 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
  • 565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
  • 566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical

How is Q74.1 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q74.1. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Absence › patella, congenital (of) (organ or part) (complete or partial)
  • Agenesis › patella
  • Anomaly, anomalous › knee (congenital) (unspecified type)
  • Anomaly, anomalous › patella (congenital) (unspecified type)
  • Bifid › patella (congenital)
  • Biparta, bipartite › patella
  • Elongated, elongation › ligamentum patellae (congenital)
  • Genu › congenital
  • Hypertrophy, hypertrophic › meniscus, knee, congenital
  • Hypoplasia, hypoplastic › patella
  • Knock knee › congenital (acquired)
  • Rudimentary › patella (congenital)

Excludes1 — never code together

The conditions below can never be reported together with Q74.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • congenital dislocation of knee (Q68.2)
  • congenital genu recurvatum (Q68.2)
  • nail patella syndrome (Q87.2)

Inclusion terms

Alternative wording in documentation that is classified to Q74.1.

  • Congenital absence of patella
  • Congenital dislocation of patella
  • Congenital genu valgum
  • Congenital genu varum
  • Rudimentary patella

Excludes1 — never code together — inherited from Q74

The conditions below can never be reported together with Q74.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • polydactyly (Q69.-)
  • reduction defect of limb (Q71-Q73)
  • syndactyly (Q70.-)

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q74.1, but a patient may have both at the same time. When documentation supports it, Q74.1 and the excluded code may both be reported.

  • inborn errors of metabolism (E70-E88)

How long has Q74.1 existed?

Q74.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with Q74.1?

ICD-10-CM declares these codes mutually exclusive with Q74.1 — exactly one of each pair can be correct for a given encounter.

Which conditions are coded to Q74.1?

What other codes are in the Q74 family? (5)