ICD-10-CM 2027
ICD-10 code for delayed development
Unspecified lack of expected normal physiological development in childhood
From the official ICD-10-CM alphabetic index entry “Development › delayed”. Page updated September 29, 2026.
About coding delayed development
The ICD-10-CM code for delayed development is R62.50 (Unspecified lack of expected normal physiological development in childhood). The official index lists 10 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R62.50.
Within R62.5, choose R62.50 (Unspecified lack of expected normal physiological development in childhood) only when documentation doesn't support a more specific option: failure to thrive (child) (R62.51), short stature (child) (R62.52) and other lack of expected normal physiological development in childhood (R62.59).
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 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395) and DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), 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 delayed development codes (official index)
- arithmetical skills F81.2 — Mathematics disorder
- language (skills) (expressive) F80.1 — Expressive language disorder
- learning skill F81.9 — Developmental disorder of scholastic skills, unspecified
- mixed skills F88 — Other disorders of psychological development
- motor coordination F82 — Specific developmental disorder of motor function
- reading F81.0 — Specific reading disorder
- specified learning skill NEC F81.89 — Other developmental disorders of scholastic skills
- speech F80.9 — Developmental disorder of speech and language, unspecified
- spelling F81.81 — Disorder of written expression
- written expression F81.81 — Disorder of written expression
Common questions about delayed development ICD-10 codes
What is the ICD-10 code for delayed development?
- R62.50 — Unspecified lack of expected normal physiological development in childhood. More specific codes apply when the documentation supports them: F81.2, F80.1, F81.9, F88 and others below.
What is the ICD-10 code for arithmetical skills delayed development?
- F81.2 — Mathematics disorder.
What is the ICD-10 code for language delayed development?
- F80.1 — Expressive language disorder.
What is the ICD-10 code for learning skill delayed development?
- F81.9 — Developmental disorder of scholastic skills, unspecified.
What is the ICD-10 code for mixed skills delayed development?
- F88 — Other disorders of psychological development.
What is the ICD-10 code for motor coordination delayed development?
- F82 — Specific developmental disorder of motor function.
What is the ICD-10 code for reading delayed development?
- F81.0 — Specific reading disorder.
Is R62.50 billable?
- Yes. R62.50 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R62.50 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R62.50 as a principal diagnosis.
Is R62.50 a CC or MCC?
- No. R62.50 is neither a CC nor an MCC under MS-DRG v44.0.