ICD-10-CM 2027
ICD-10 code for dwarfism
From the official ICD-10-CM alphabetic index entry “Dwarfism”. Page updated September 29, 2026.
About coding dwarfism
The ICD-10-CM code for dwarfism is E34.328 (Other genetic causes of short stature). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E34.328.
Within E34.32, choose E34.328 (Other genetic causes of short stature) only when documentation doesn't support a more specific option: primary insulin-like growth factor-1 (IGF-1) deficiency (E34.321), insulin-like growth factor-1 (IGF-1) resistance (E34.322) and unspecified genetic causes of short stature (E34.329).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific dwarfism codes (official index)
- achondroplastic Q77.4 — Achondroplasia
- congenital E34.328 — Other genetic causes of short stature
- constitutional E34.31 — Constitutional short stature
- hypochondroplastic Q77.4 — Achondroplasia
- hypophyseal E23.0 — Hypopituitarism
- infantile E34.328 — Other genetic causes of short stature
- Laron-type E34.321 — Primary insulin-like growth factor-1 (IGF-1) deficiency
- Lorain (-Levi) type E23.0 — Hypopituitarism
- metatropic Q77.8 — Other osteochondrodysplasia with defects of growth of tubular bones and spine
- nephrotic-glycosuric (with hypophosphatemic rickets) E72.09 — Other disorders of amino-acid transport
- nutritional E45 — Retarded development following protein-calorie malnutrition
- pancreatic K86.89 — Other specified diseases of pancreas
- pituitary E23.0 — Hypopituitarism
- renal N25.0 — Renal osteodystrophy
- thanatophoric Q77.1 — Thanatophoric short stature
Common questions about dwarfism ICD-10 codes
What is the ICD-10 code for dwarfism?
- E34.328 — Other genetic causes of short stature. More specific codes apply when the documentation supports them: Q77.4, E34.328, E34.31, Q77.4 and others below.
What is the ICD-10 code for achondroplastic dwarfism?
- Q77.4 — Achondroplasia.
What is the ICD-10 code for congenital dwarfism?
- E34.328 — Other genetic causes of short stature.
What is the ICD-10 code for constitutional dwarfism?
- E34.31 — Constitutional short stature.
What is the ICD-10 code for hypochondroplastic dwarfism?
- Q77.4 — Achondroplasia.
What is the ICD-10 code for hypophyseal dwarfism?
- E23.0 — Hypopituitarism.
What is the ICD-10 code for infantile dwarfism?
- E34.328 — Other genetic causes of short stature.
Is E34.328 billable?
- Yes. E34.328 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E34.328 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E34.328 as a principal diagnosis.
Is E34.328 a CC or MCC?
- No. E34.328 is neither a CC nor an MCC under MS-DRG v44.0.