ICD-10-CM 2027
ICD-10 code for milestone delay
From the official ICD-10-CM alphabetic index entry “Delay, delayed › milestone”. Page updated September 29, 2026.
About coding milestone delay
The ICD-10-CM code for milestone delay is R62.0 (Delayed milestone in childhood).
Within R62 (lack of expected normal physiological development in childhood and adults), R62.0 is specifically for delayed milestone in childhood. Related codes cover other and unspecified lack of expected normal physiological development in childhood (R62.5) and adult failure to thrive (R62.7).
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.
Common questions about milestone delay ICD-10 codes
What is the ICD-10 code for milestone delay?
- R62.0 — Delayed milestone in childhood.
Is R62.0 billable?
- Yes. R62.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R62.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R62.0 as a principal diagnosis.
Is R62.0 a CC or MCC?
- No. R62.0 is neither a CC nor an MCC under MS-DRG v44.0.