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ICD-10-CM 2027 diagnosis code

R62.59Other lack of expected normal physiological development in childhood

✓ Billable / specific

R62.59 is a valid, billable ICD-10-CM code for other lack of expected normal physiological development in childhood. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth lack of expected normal physiol development in childhood

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R62.59

R62.59 is the ICD-10-CM diagnosis code for other lack of expected normal physiological development in childhood. It belongs to category R62 (lack of expected normal physiological development in childhood and adults), block R50-R69 (general symptoms and signs) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R62.5, choose R62.59 (Other lack of expected normal physiological development in childhood) only when documentation doesn't support a more specific option: unspecified lack of expected normal physiological development in childhood (R62.50), failure to thrive (child) (R62.51) and short stature (child) (R62.52).

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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 783.40 (lack of normal physiological development, unspecified).

Notes that apply from higher levels

Instructions written at a parent level also apply to R62.59.

› From R62.5 Other and unspecified lack of expected normal physiological development in childhood
Excludes1
  • HIV disease resulting in failure to thrive (B20)
  • physical retardation due to malnutrition (E45)
› From R62 Lack of expected normal physiological development in childhood and adults
Excludes1

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to R62.59.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 783.40Lack of normal physiological development, unspecifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R62.59

Is R62.59 billable?

Yes. R62.59 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R62.59 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R62.59 as a principal diagnosis.

Is R62.59 a CC or MCC?

No. R62.59 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R62.59 group to?

R62.59 is used in the MS-DRG v44.0 logic for MS-DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC) and MS-DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R62.59?

The CMS General Equivalence Mappings map R62.59 to ICD-9-CM 783.40.