2026 ICD-10-CM Diagnosis Code Q71.899Other reduction defects of unspecified upper limb

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q71

ICD-10-CM Q71.899
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q71.899 is a billable ICD-10-CM diagnosis code for other reduction defects of unspecified upper 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
Q71.899
Billable Status
Yes — Valid for Submission
Code Describes
Other reduction defects of unspecified upper limb
Short Description
Other reduction defects of unspecified upper limb
Same as the full description in the CMS dataset.
Parent Code
Q71.89
Other reduction defects of upper limb

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ71Reduction defects of upper limb
This CodeQ71.899Other reduction defects of unspecified upper limb

Present on Admission (POA)Billing

Q71.899 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 fifth metacarpal
  • Acrodysplasia scoliosis
  • Agenesis of humerus
  • Aplasia of humerus
  • Aplasia of lateral condyle of humerus
  • Congenital abnormal shape of carpal bone
  • Congenital absence of humerus
  • Congenital absence of part of upper arm
  • Congenital amputation of upper limb
  • Congenital anomalies of elbow and upper arm
  • Congenital hypoplasia of bone of hand
  • Congenital hypoplasia of bone of radius and/or ulna
  • Congenital hypoplasia of carpal bone
  • Congenital hypoplasia of fibula
  • Congenital hypoplasia of fifth metacarpal bone
  • Congenital hypoplasia of first metacarpal bone
  • Congenital hypoplasia of fourth metacarpal bone
  • Congenital hypoplasia of humerus
  • Congenital hypoplasia of index finger
  • Congenital hypoplasia of little finger
  • Congenital hypoplasia of metacarpal bone
  • Congenital hypoplasia of middle finger
  • Congenital hypoplasia of middle phalanx of finger
  • Congenital hypoplasia of middle phalanx of index finger
  • Congenital hypoplasia of middle phalanx of little finger
  • Congenital hypoplasia of middle phalanx of middle finger
  • Congenital hypoplasia of middle phalanx of ring finger
  • Congenital hypoplasia of phalanx of hand
  • Congenital hypoplasia of phalanx of index finger
  • Congenital hypoplasia of phalanx of little finger
  • Congenital hypoplasia of phalanx of middle finger
  • Congenital hypoplasia of phalanx of ring finger
  • Congenital hypoplasia of phalanx of thumb
  • Congenital hypoplasia of proximal phalanx of hand
  • Congenital hypoplasia of proximal phalanx of thumb
  • Congenital hypoplasia of radius
  • Congenital hypoplasia of ring finger
  • Congenital hypoplasia of second metacarpal bone
  • Congenital hypoplasia of third metacarpal bone
  • Congenital hypoplasia of ulna
  • Deformity of carpal bone
  • Deformity of metacarpal
  • Generalized spacing of maxillary teeth
  • Hyperphalangy
  • Hypoplasia of distal phalanx of hand
  • Hypoplasia of distal phalanx of index finger
  • Hypoplasia of distal phalanx of little finger
  • Hypoplasia of distal phalanx of middle finger
  • Hypoplasia of distal phalanx of ring finger
  • Hypoplasia of radius
  • Hypoplasia of thumb
  • Hypoplastic thumb-Blauth 1
  • Hypoplastic thumb-Blauth 2
  • Hypoplastic thumb-Blauth 3
  • Hypoplastic thumb-Blauth 4
  • Hypoplastic thumb-Blauth 5
  • Longitudinal deficiency of carpal bone
  • Longitudinal deficiency of metacarpal bone
  • Longitudinal deficiency of phalanges of hand
  • Reinhardt Pfeiffer mesomelic dysplasia
  • Schmitt Gillenwater Kelly syndrome
  • Short fifth metacarpal insulin resistance syndrome
  • Transverse deficiency of arm, upper arm level - long
  • Transverse deficiency of arm, upper arm level - short
  • Transverse deficiency of upper limb
  • Triphalangeal thumb

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 Q71.899 to ICD-9-CMHistory

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

ICD-9-CM
755.20 Reduc deform up limb 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 Q71.899Overview

Is Q71.899 (Other reduction defects of upper limb) a billable code?

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

What MS-DRG does Q71.899 group to?

When other reduction defects of unspecified upper 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 Q71.899 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 upper limb on inpatient claims.

What is the ICD-9 equivalent of Q71.899?

Under the General Equivalence Mappings, other reduction defects of unspecified upper limb converts to ICD-9-CM 755.20 (reduc deform up limb 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.