2026 ICD-10-CM Diagnosis Code Q72.899Other reduction defects of unspecified lower limb

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q72

ICD-10-CM Q72.899
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q72.899 is a billable ICD-10-CM diagnosis code for other reduction defects of unspecified lower limb. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q72.899
Billable Status
Yes — Valid for Submission
Code Describes
Other reduction defects of unspecified lower limb
Short Description
Other reduction defects of unspecified lower limb
Same as the full description in the CMS dataset.
Parent Code
Q72.89
Other reduction defects of lower limb

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ72Reduction defects of lower limb
This CodeQ72.899Other reduction defects of unspecified lower limb

Present on Admission (POA)Billing

Q72.899 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormally short ilium
  • Aplasia of fibula
  • Brachymelia of lower limb
  • Congenital abnormal shape of ilium
  • Congenital hypoplasia of bone of head and neck of femur
  • Congenital hypoplasia of bone of radius and/or ulna
  • Congenital hypoplasia of femur
  • Congenital hypoplasia of fibula
  • Congenital hypoplasia of great toe
  • Congenital hypoplasia of lesser trochanter of femur
  • Congenital hypoplasia of middle phalanx of fifth toe
  • Congenital hypoplasia of middle phalanx of foot
  • Congenital hypoplasia of middle phalanx of fourth toe
  • Congenital hypoplasia of middle phalanx of second toe
  • Congenital hypoplasia of middle phalanx of third toe
  • Congenital hypoplasia of phalanx of fifth toe
  • Congenital hypoplasia of phalanx of foot
  • Congenital hypoplasia of phalanx of fourth toe
  • Congenital hypoplasia of phalanx of great toe
  • Congenital hypoplasia of phalanx of second toe
  • Congenital hypoplasia of phalanx of third toe
  • Congenital hypoplasia of proximal epiphysis of femur
  • Congenital hypoplasia of proximal phalanx of foot
  • Congenital hypoplasia of proximal phalanx of great toe
  • Congenital hypoplasia of proximal phalanx of third toe
  • Congenital hypoplasia of tibia
  • Congenital hypoplasia of toe
  • Congenital hypoplasia of ulna
  • Ectromelia
  • Ectromelia of lower limb
  • Fibular aplasia and complex brachydactyly
  • Fibular aplasia, tibial campomelia, oligo-syndactyly syndrome
  • Hypoplasia of distal phalanx of fifth toe
  • Hypoplasia of distal phalanx of foot
  • Hypoplasia of distal phalanx of fourth toe
  • Hypoplasia of distal phalanx of great toe
  • Hypoplasia of distal phalanx of second toe
  • Hypoplasia of distal phalanx of third toe
  • Incomplete congenital absence of lower limb
  • Longitudinal deficiency of lower limb
  • Mesomelic dysplasia of lower limb
  • Radial deficiency, tibial hypoplasia syndrome
  • Reduction deformity of lower limb
  • Reinhardt Pfeiffer mesomelic dysplasia
  • Tibial hemimelia, polysyndactyly, triphalangeal thumb syndrome
  • Transverse deficiency lower limb - through femur
  • Transverse deficiency lower limb - through tibia/fibula
  • Transverse deficiency of lower limb

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL008
Musculoskeletal congenital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Ectromelia

    gross hypo- or aplasia of one or more long bones of one or more limbs. the concept includes amelia, hemimelia, phocomelia, and sirenomelia.

  • Ectromelia virus

    a species of orthopoxvirus infecting mice and causing a disease that involves internal organs and produces characteristic skin lesions.

  • Ectromelia, Infectious

    a viral infection of mice, causing edema and necrosis followed by limb loss.

  • Orthopoxvirus

    a genus of the family poxviridae, subfamily chordopoxvirinae, comprising many species infecting mammals. viruses of this genus cause generalized infections and a rash in some hosts. the type species is vaccinia virus.

  • Ectromelia

    a congenital defect characterized by the absence or hypoplasia of one or more extremities.

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q72.899 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
755.30 Reduction deform leg NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q72.899Overview

Is Q72.899 (Other reduction defects of lower limb) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other reduction defects of unspecified lower limb on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q72.899 group to?

When other reduction defects of unspecified lower limb is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q72.899 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other reduction defects of unspecified lower limb on inpatient claims.

What is the ICD-9 equivalent of Q72.899?

Under the General Equivalence Mappings, other reduction defects of unspecified lower limb converts to ICD-9-CM 755.30 (reduction deform leg NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.