ICD-10-CM Code For Syndactyly: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group Q70 includes congenital syndactyly diagnoses characterized by partial or complete fusion of fingers or toes, with variants for simple (soft tissue) and complex (osseous) involvement. These ICD-10-CM diagnosis codes are used to document congenital digit fusion severity, laterality, and involvement of soft tissue versus bone to capture clinical complexity and surgical planning needs. Accurate coding within the ICD-10-CM Q70 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM Q70: Syndactyly Overview

The ICD-10-CM Q70 group covers congenital fusion of digits known as syndactyly, affecting fingers or toes and involving soft tissue and/or bone. These conditions are congenital malformations of the musculoskeletal system and may present as simple or complex fusions, often unilateral or bilateral. Accurate coding supports clinical communication and plays a role in appropriate reimbursement for surgical or therapeutic interventions.

When to Use

Use a code from this group when documenting a congenital fusion of digits confirmed by clinical examination or imaging in a patient record. Select the specific code that indicates simple versus complex syndactyly and the correct laterality to ensure accurate clinical and billing documentation.

ICD-10-CM Codes

18 rows

ICD-10-CM Code	Description
Q70.00	Fused fingers, unspecified hand
Q70.01	Fused fingers, right hand
Q70.02	Fused fingers, left hand
Q70.03	Fused fingers, bilateral
Q70.10	Webbed fingers, unspecified hand
Q70.11	Webbed fingers, right hand
Q70.12	Webbed fingers, left hand
Q70.13	Webbed fingers, bilateral
Q70.20	Fused toes, unspecified foot
Q70.21	Fused toes, right foot
Q70.22	Fused toes, left foot
Q70.23	Fused toes, bilateral
Q70.30	Webbed toes, unspecified foot
Q70.31	Webbed toes, right foot
Q70.32	Webbed toes, left foot
Q70.33	Webbed toes, bilateral
Q70.4	Polysyndactyly, unspecified
Q70.9	Syndactyly, unspecified

DRG Codes

3 rows

DRG Code	Description
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC

Typical Clinical Scenarios

A newborn is evaluated in the newborn nursery after delivery because physical exam reveals fused skin between the second and third fingers on the right hand with intact nail beds and otherwise normal limb development. The infant is referred to pediatric orthopedics for assessment and parental counseling; a congenital syndactyly diagnosis is assigned based on the congenital nature and the specific digits involved. Typical codes: Q70.01, Q70.11
A 6-year-old child presents to a pediatric outpatient clinic with functional limitation and recurrent skin irritation between the toes causing hygiene problems; the family reports the child has had webbed second and third toes since birth but now seeks surgical correction for walking discomfort. The visit documents congenital toe syndactyly affecting the lower extremity and plans for elective separation surgery, so a congenital syndactyly code for toes is recorded. Typical codes: Q70.21, Q70.31
An adult with a history of repaired congenital syndactyly in childhood is seen for chronic stiffness and scar contracture at the site of previous web separation, causing decreased range of motion and painful activities; the patient seeks evaluation by hand surgery for revision. The clinician documents residual congenital syndactyly sequelae of the fingers with post-surgical complications, and a code from the group indicating congenital syndactyly of the fingers with unspecified laterality is assigned. Typical codes: Q70.10, Q70.4}?>

Related Codes

Q65-CONGENITAL-DEFORMITIES-OF-HIP

ICD-10-CM Code For Congenital Deformities Of Hip: Group Overview

Q66-CONGENITAL-DEFORMITIES-OF-FEET

ICD-10-CM Code For Congenital Deformities Of Feet: Group Overview

Q67-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES-HEAD-FACE-SPINE-CHEST

ICD-10-CM Code For Congenital Musculoskeletal Deformities Of Head Face Spine And Chest: Group Overview

Q68-OTHER-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES

ICD-10-CM Code For Other Congenital Musculoskeletal Deformities: Group Overview

Q69-POLYDACTYLY

ICD-10-CM Code For Polydactyly: Group Overview

Q71-REDUCTION-DEFECTS-OF-UPPER-LIMB

ICD-10-CM Code For Reduction Defects Of Upper Limb: Group Overview

Q72-REDUCTION-DEFECTS-OF-LOWER-LIMB

ICD-10-CM Code For Reduction Defects Of Lower Limb: Group Overview

Q73-REDUCTION-DEFECTS-OF-UNSPECIFIED-LIMB

ICD-10-CM Code For Reduction Defects Of Unspecified Limb: Group Overview

Q74-OTHER-CONGENITAL-MALFORMATIONS-OF-LIMBS

ICD-10-CM Code For Other Congenital Malformations Of Limb(S): Group Overview

Q75-OTHER-CONGENITAL-SKULL-FACE-MALFORMATIONS

ICD-10-CM Code For Other Congenital Malformations Of Skull And Face Bones: Group Overview

Showing 1–10 of 14

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

18 rows

ICD-10-CM Code	Description
Q70.00	Fused fingers, unspecified hand
Q70.01	Fused fingers, right hand
Q70.02	Fused fingers, left hand
Q70.03	Fused fingers, bilateral
Q70.10	Webbed fingers, unspecified hand
Q70.11	Webbed fingers, right hand
Q70.12	Webbed fingers, left hand
Q70.13	Webbed fingers, bilateral
Q70.20	Fused toes, unspecified foot
Q70.21	Fused toes, right foot
Q70.22	Fused toes, left foot
Q70.23	Fused toes, bilateral
Q70.30	Webbed toes, unspecified foot
Q70.31	Webbed toes, right foot
Q70.32	Webbed toes, left foot
Q70.33	Webbed toes, bilateral
Q70.4	Polysyndactyly, unspecified
Q70.9	Syndactyly, unspecified

DRG Codes

3 rows

DRG Code	Description
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC

Typical Clinical Scenarios

A newborn is evaluated in the newborn nursery after delivery because physical exam reveals fused skin between the second and third fingers on the right hand with intact nail beds and otherwise normal limb development. The infant is referred to pediatric orthopedics for assessment and parental counseling; a congenital syndactyly diagnosis is assigned based on the congenital nature and the specific digits involved. Typical codes: Q70.01, Q70.11
A 6-year-old child presents to a pediatric outpatient clinic with functional limitation and recurrent skin irritation between the toes causing hygiene problems; the family reports the child has had webbed second and third toes since birth but now seeks surgical correction for walking discomfort. The visit documents congenital toe syndactyly affecting the lower extremity and plans for elective separation surgery, so a congenital syndactyly code for toes is recorded. Typical codes: Q70.21, Q70.31
An adult with a history of repaired congenital syndactyly in childhood is seen for chronic stiffness and scar contracture at the site of previous web separation, causing decreased range of motion and painful activities; the patient seeks evaluation by hand surgery for revision. The clinician documents residual congenital syndactyly sequelae of the fingers with post-surgical complications, and a code from the group indicating congenital syndactyly of the fingers with unspecified laterality is assigned. Typical codes: Q70.10, Q70.4}?>

Related Codes

Q65-CONGENITAL-DEFORMITIES-OF-HIP

ICD-10-CM Code For Congenital Deformities Of Hip: Group Overview

Q66-CONGENITAL-DEFORMITIES-OF-FEET

ICD-10-CM Code For Congenital Deformities Of Feet: Group Overview

Q67-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES-HEAD-FACE-SPINE-CHEST

ICD-10-CM Code For Congenital Musculoskeletal Deformities Of Head Face Spine And Chest: Group Overview

Q68-OTHER-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES

ICD-10-CM Code For Other Congenital Musculoskeletal Deformities: Group Overview

Q69-POLYDACTYLY

ICD-10-CM Code For Polydactyly: Group Overview

Q71-REDUCTION-DEFECTS-OF-UPPER-LIMB

ICD-10-CM Code For Reduction Defects Of Upper Limb: Group Overview

Q72-REDUCTION-DEFECTS-OF-LOWER-LIMB

ICD-10-CM Code For Reduction Defects Of Lower Limb: Group Overview

Q73-REDUCTION-DEFECTS-OF-UNSPECIFIED-LIMB

ICD-10-CM Code For Reduction Defects Of Unspecified Limb: Group Overview

Q74-OTHER-CONGENITAL-MALFORMATIONS-OF-LIMBS

ICD-10-CM Code For Other Congenital Malformations Of Limb(S): Group Overview

Q75-OTHER-CONGENITAL-SKULL-FACE-MALFORMATIONS

ICD-10-CM Code For Other Congenital Malformations Of Skull And Face Bones: Group Overview

Showing 1–10 of 14

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Syndactyly: Group Overview

Sign up for ICD-10-CM Code For Syndactyly: Group Overview policy alerts

ICD-10-CM Q70: Syndactyly Overview

ICD-10-CM Code For Syndactyly: Group Overview

Sign up for ICD-10-CM Code For Syndactyly: Group Overview policy alerts

ICD-10-CM Q70: Syndactyly Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM Q70 group for syndactyly?

How do individual `ICD-10-CM` codes in Q70 capture laterality and digit involvement?

What is the distinction between 'fused' and 'webbed' codes within this group?

How can accurate coding in the Q70 group affect reimbursement and claims?

Which DRGs are related to diagnoses in the Q70 syndactyly group?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM Q70 group for syndactyly?

How do individual `ICD-10-CM` codes in Q70 capture laterality and digit involvement?

What is the distinction between 'fused' and 'webbed' codes within this group?

How can accurate coding in the Q70 group affect reimbursement and claims?

Which DRGs are related to diagnoses in the Q70 syndactyly group?

References