Skip to main content

Q71.90 ICD-10-CM Code: Unspecified reduction defect of unspecified upper limb

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

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

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

Unspecified reduction defect of unspecified upper limb is a billable ICD-10-CM diagnosis code (Q71.90).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Unspecified reduction defect of unspecified upper limb

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

Other codes that name Q71.90 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 4 Excludes1 notes across 3 chapters: M21 — Other acquired deformities of limbs (via Q71.-), Q68 — Other congenital musculoskeletal deformities (via Q71.-), Q74 — Other congenital malformations of limb(s) (via Q71.-), Z89 — Acquired absence of limb (via Q71.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

MS-DRG Grouper Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Potential MS-DRG participation — not a DRG assignment.

Named in the grouper logic of 3 MS-DRGs: DRG 564 (MDC 08), DRG 565 (MDC 08), DRG 566 (MDC 08).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):MAL008 — Musculoskeletal congenital conditions (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Musculoskeletal congenital conditions).

Q71.62 — Lobster-claw left hand, Q71.63 — Lobster-claw hand, bilateral, Q71.811 — Congenital shortening of right upper limb, Q71.812 — Congenital shortening of left upper limb, Q71.813 — Congenital shortening of upper limb, bilateral, Q71.819 — Congenital shortening of unspecified upper limb, Q71.891 — Other reduction defects of right upper limb, Q71.892 — Other reduction defects of left upper limb, Q71.893 — Other reduction defects of upper limb, bilateral, Q71.899 — Other reduction defects of unspecified upper limb, Q71.91 — Unspecified reduction defect of right upper limb, Q71.92 — Unspecified reduction defect of left upper limb, Q71.93 — Unspecified reduction defect of upper limb, bilateral, Q72.00 — Congenital complete absence of unspecified lower limb, Q72.01 — Congenital complete absence of right lower limb, Q72.02 — Congenital complete absence of left lower limb, Q72.03 — Congenital complete absence of lower limb, bilateral, Q72.10 — Congenital absence of unspecified thigh and lower leg with foot present, Q72.11 — Congenital absence of right thigh and lower leg with foot present, Q72.12 — Congenital absence of left thigh and lower leg with foot present, +245 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Defect, defective”; these codes share that main term but sit in a different category of the Tabular List.

Q21.9 — Congenital malformation of cardiac septum, unspecified (septal NOS), Q27.9 — Congenital malformation of peripheral vascular system, unspecified (vascular, congenital), Q28.9 — Congenital malformation of circulatory system, unspecified (circulation, newborn), Q34.9 — Congenital malformation of respiratory system, unspecified (respiratory system, congenital), Q39.9 — Congenital malformation of esophagus, unspecified (esophagus, congenital), Q62.2 — Congenital megaureter (obstructive, congenital, ureter, megaureter), Q62.31 — Congenital ureterocele, orthotopic (obstructive, congenital, ureter, orthotopic ureterocele), Q62.32 — Cecoureterocele (obstructive, congenital, ureter, cecoureterocele), Q62.39 — Other obstructive defects of renal pelvis and ureter (renal pelvis, obstructive), Q63.8 — Other specified congenital malformations of kidney (renal pelvis), Q72.4 — Longitudinal reduction defect of femur (reduction, limb, lower, longitudinal, femur), Q72.5 — Longitudinal reduction defect of tibia (reduction, limb, lower, longitudinal, tibia), Q72.6 — Longitudinal reduction defect of fibula (reduction, limb, lower, longitudinal, fibula), Q72.7 — Split foot (reduction, limb, lower, split foot), Q72.89 — Other reduction defects of lower limb (reduction, limb, lower, specified type NEC), Q72.9 — Unspecified reduction defect of lower limb (reduction, limb, lower), Q73.8 — Other reduction defects of unspecified limb(s) (reduction, limb), Q79.0 — Congenital diaphragmatic hernia (diaphragm, congenital, gross), Q79.1 — Other congenital malformations of diaphragm (diaphragm, congenital), Q79.59 — Other congenital malformations of abdominal wall (abdominal wall, congenital), +96 more

Contextual Map

Every relationship of Q71.90 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

Referenced by Excludes1 notes

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Q71.90 in its code family, with their registry titles.

View all codes in the Q71 family