2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) 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 the other POA exempt codes in Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q72.899: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q72.899, its category, or a range that includes it.

Excludes1 5

These codes carry an Excludes1 note naming Q72.899: they are not reported together with it, unless the two conditions are unrelated.

  • Q66 Congenital deformities of feet
    reduction defects of feet (Q72.-) names Q72.-, which includes this code
  • M21 Other acquired deformities of limbs
    congenital absence of limbs (Q71-Q73) names Q71-Q73, which includes this code
  • Q68 Other congenital musculoskeletal deformities
    reduction defects of limb(s) (Q71-Q73) names Q71-Q73, which includes this code
  • Q74 Other congenital malformations of limb(s)
    reduction defect of limb (Q71-Q73) names Q71-Q73, which includes this code
  • Z89 Acquired absence of limb
    congenital absence of limbs (Q71-Q73) names Q71-Q73, which includes this code

Clinical ClassificationClinical

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

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

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q72.899Overview

What is the ICD-10 code for other reduction defects of unspecified lower limb?

The ICD-10-CM code for other reduction defects of unspecified lower limb is Q72.899 (sometimes written as Q72899). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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, 566, 565, with relative weights from 0.7374 to 1.4909 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. The code appears in the Congenital malformations and deformations of the musculoskeletal system (Q65-Q79) range of the CMS exempt list.

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.