E08.21

Diabetes mellitus due to underlying condition with diabetic nephropathy

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC37

Diabetes with Chronic Complications

CMS-HCC ESRD V24

HCC18

Diabetes with Chronic Complications

RxHCC V08

RXHCC30

Diabetes with Complications

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · E08.21
Synonyms

Diabetes mellitus due to underlying condition with intercapillary glomerulosclerosis Diabetes mellitus due to underlying condition with intracapillary glomerulonephrosis Diabetes mellitus due to underlying condition with Kimmelstiel-Wilson disease

Inherited from E08Diabetes mellitus due to underlying condition
Excludes 1

drug or chemical induced diabetes mellitus (E09.-) gestational diabetes (O24.4-) neonatal diabetes mellitus (P70.2) postpancreatectomy diabetes mellitus (E13.-) postprocedural diabetes mellitus (E13.-) secondary diabetes mellitus NEC (E13.-) type 1 diabetes mellitus (E10.-) type 2 diabetes mellitus (E11.-)

Use additional

code to identify control using: injectable non-insulin antidiabetic drugs (Z79.85) insulin (Z79.4) oral antidiabetic drugs (Z79.84) oral hypoglycemic drugs (Z79.84)

Code first

the underlying condition, such as: congenital rubella (P35.0) Cushing's syndrome (E24.-) cystic fibrosis (E84.-) malignant neoplasm (C00-C96) malnutrition (E40-E46) pancreatitis and other diseases of the pancreas (K85-K86.-)

Inherited from chapter 4Endocrine, nutritional and metabolic diseases
Excludes 1

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Note

All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Official Guidelines for E08.21

FY 2026 ›