Q70.3 Webbed toes

ICD-10-CM Diagnosis Code Q70.3: Webbed Toes

ICD-10-CM code Q70.3 represents the diagnosis of webbed toes, classified as a congenital abnormality under the parent category Q70 for syndactyly. The code is active, and related terminology mappings indicate more specific subcodes exist to designate laterality, including right, left, bilateral, or unspecified foot. 1 3 4

Plain-language overview

Code Q70.3 identifies webbed toes, a congenital abnormality, and clinical literature documents the physical presence of fused toes during examinations of newborns with specific conditions. 1 2

What this code represents

The terminology record for Q70.3 establishes the official display label as webbed toes, classifies it as a congenital abnormality, and lists Q70 syndactyly as its parent concept. 1

The Q70.3 code is an active terminology record that currently has no narrower concepts, meaning it functions as a specific diagnostic entity within the ICD-10-CM version 2026. 1

Coding details

While Q70.3 is a valid code, terminology mappings indicate the existence of more specific ICD-10-CM 2025 codes, such as Q70.33 for bilateral webbed toes and Q70.31 for the right foot. 3 4

Additional related codes from a clinical resource specify Q70.32 for webbed toes of the left foot and Q70.30 when the affected foot is unspecified, providing laterality options. 4

Documentation considerations

Available coding resources provide distinct subcodes for right, left, bilateral, and unspecified webbed toes, reflecting a structural capacity to record the affected foot's laterality. 3 4

Clinical context

Webbed toes are documented as a clinical manifestation of syndactyly, and this fusion of digits is observed alongside other skeletal anomalies in newborn presentations. 2

What the sources add

A clinical case report describes webbed toes as a classic feature of Apert syndrome, whereas the terminology record strictly defines the code without linking it to specific syndromes. 1 2

Comparing the sources reveals that terminology records provide the official code hierarchy, while clinical articles and mapping resources supply the lateral subcodes and physical presentation context. 1 2 3

Sources

1. ICD-10-CM Q70.3 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Apert syndrome in a newborn with premature fusion of skull bones, a rostral nose, and cleft palate: A case report — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. Q70.32 - Webbed toes, left foot | ICD-10-CM — unboundmedicine.com; accessed 2026-07-27.