2027 ICD-10-CM Diagnosis Code Q70Syndactyly

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q70

ICD-10-CM Q70
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q70 is a non-billable ICD-10-CM category code for syndactyly, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q70.00, Q70.01, Q70.02, and Q70.03.

Code Identity

ICD-10-CM Code
Q70
Billable Status
No — Non-Billable Category
Code Describes
Syndactyly
Short Description
Syndactyly
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
CategoryQ70Syndactyly
This CodeQ70Syndactyly

Specific Coding for SyndactylyOverview

Non-specific codes like Q70 require more characters. Use one of these billable codes instead:

  • Q70.0 for Fused fingers

  • Use Q70.00 for Fused fingers, unspecified hand

  • Use Q70.01 for Fused fingers, right hand

  • Use Q70.02 for Fused fingers, left hand

  • Use Q70.03 for Fused fingers, bilateral

  • Q70.1 for Webbed fingers

  • Use Q70.10 for Webbed fingers, unspecified hand

  • Use Q70.11 for Webbed fingers, right hand

  • Use Q70.12 for Webbed fingers, left hand

  • Use Q70.13 for Webbed fingers, bilateral

  • Q70.2 for Fused toes

  • Use Q70.20 for Fused toes, unspecified foot

  • Use Q70.21 for Fused toes, right foot

  • Use Q70.22 for Fused toes, left foot

  • Use Q70.23 for Fused toes, bilateral

  • Q70.3 for Webbed toes

  • Use Q70.30 for Webbed toes, unspecified foot

  • Use Q70.31 for Webbed toes, right foot

  • Use Q70.32 for Webbed toes, left foot

  • Use Q70.33 for Webbed toes, bilateral

  • Use Q70.4 for Polysyndactyly, unspecified

  • Use Q70.9 for Syndactyly, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q70: 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 Q70, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming Q70: they are not reported together with it, unless the two conditions are unrelated.

  • Q74 Other congenital malformations of limb(s)
    syndactyly (Q70.-)
  • M20 Acquired deformities of fingers and toes
    congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-) names Q68-Q70, which includes this code

Clinical InformationClinical

  • Syndactyly

    a congenital anomaly of the hand or foot, marked by the webbing between adjacent fingers or toes. syndactylies are classified as complete or incomplete by the degree of joining. syndactylies can also be simple or complex. simple syndactyly indicates joining of only skin or soft tissue; complex syndactyly marks joining of bony elements.

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 Q70Overview

What is the ICD-10 code for syndactyly?

Q70 is the ICD-10-CM category for syndactyly, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Q70 (Syndactyly) a billable code?

No. This is a category header that groups the codes for syndactyly, and headers cannot be submitted on claims. Claims for syndactyly need a more specific code from this category, such as Q70.00, Q70.01, and Q70.02.