What does ICD-10 code Q66.89 mean?

ICD-10 code Q66.89 is the standardized code used for other specified congenital deformities of feet in medical records and coding systems.

When is ICD-10 code Q66.89 used?

Doctors, hospitals, and insurers may use ICD-10 code Q66.89 when recording other specified congenital deformities of feet in a standardized format.

Does ICD-10 code Q66.89 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10BillableValid for clinical use

ICD-10 Code Q66.89: Other specified congenital deformities of feet

Name: ICD-10 Code Q66.89: Other specified congenital deformities of feet
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:29:53.188Z

Q66.89 is a billable ICD-10 diagnosis code used to classify Other specified congenital deformities of feet in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

When is it used?

May be used when a clinician documents other specified congenital deformities of feet in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter

17Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)

block

Q65-Q79Congenital malformations and deformations of the musculoskeletal system

Official coding notes

Inclusion terms

Congenital asymmetric talipes
Congenital clubfoot NOS
Congenital talipes NOS
Congenital tarsal coalition
Hammer toe, congenital

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Sibling codes

Q66.80Congenital vertical talus deformity, unspecified footbillable Q66.81Congenital vertical talus deformity, right footbillable Q66.82Congenital vertical talus deformity, left footbillable

Coding guidelines

Common synonyms

Other specified congenital deformities of feet

Frequently asked questions

Code details

CodeQ66.89

SystemICD10

Display nameOther specified congenital deformities of feet

ChapterCongenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)

BlockCongenital malformations and deformations of the musculoskeletal system

Flags

BillableYes

Valid clinical useYes

Source

SourceICD-10

Version2026-annual

Releaseannual

Year2026

Index terms

Matched terms

Clawfoot(congenital)Clawtoe(congenital)Clubfoot(congenital)CoalitionCoalitionContraction(s), contracture, contractedDeformityHammer toe(acquired)NECOverlapping toe(acquired)OverridingPes(congenital)Short, shortening, shortness

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.