2027 ICD-10-CM Diagnosis Code Q73Reduction defects of unspecified limb

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q73

ICD-10-CM Q73
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q73 is a non-billable ICD-10-CM category code for reduction defects of unspecified limb, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q73.0, Q73.1, and Q73.8.

Code Identity

ICD-10-CM Code
Q73
Billable Status
No — Non-Billable Category
Code Describes
Reduction defects of unspecified limb
Short Description
Reduction defects of unspecified limb
Same as the full description in the CMS dataset.
Chapter
Q65-Q79
Congenital malformations and deformations of the musculoskeletal system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ73Reduction defects of unspecified limb
This CodeQ73Reduction defects of unspecified limb

Specific Coding for Reduction defects of unspecified limbOverview

Non-specific codes like Q73 require more characters. Use one of these billable codes instead:

  • Use Q73.0 for Congenital absence of unspecified limb(s)

  • Use Q73.1 for Phocomelia, unspecified limb(s)

  • Use Q73.8 for Other reduction defects of unspecified limb(s)

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q73: 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 Q73, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming Q73: they are not reported together with it, unless the two conditions are unrelated.

  • 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

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.

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 Q73Overview

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

Q73 is the ICD-10-CM category for reduction defects of unspecified limb, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Q73 (Reduction defects of unspecified limb) a billable code?

No. This is a category header that groups the codes for reduction defects of unspecified limb, and headers cannot be submitted on claims. Claims for reduction defects of unspecified limb need a more specific code from this category, such as Q73.0, Q73.1, and Q73.8.