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ICD-10-CM 2027 diagnosis code

E08.9Diabetes mellitus due to underlying condition without complications

✓ Billable / specificManifestation — not principal

E08.9 is a valid, billable ICD-10-CM code for diabetes mellitus due to underlying condition without complications. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Diabetes due to underlying condition w/o complications

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 E08.9

E08.9 is the ICD-10-CM diagnosis code for diabetes mellitus due to underlying condition without complications. It belongs to category E08 (diabetes mellitus due to underlying condition), block E08-E13 (diabetes mellitus) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E08, choose E08.9 (without complications) only when documentation doesn't support a more specific option: with hyperosmolarity (E08.0), with ketoacidosis (E08.1), with kidney complications (E08.2), with ophthalmic complications (E08.3), with neurological complications (E08.4), with circulatory complications (E08.5), with other specified complications (E08.6) and with unspecified complications (E08.8).

Code first the underlying condition, such as: congenital rubella (P35.0), Cushing's syndrome (E24.-), cystic fibrosis (E84.-), malignant neoplasm (C00-C96) and 2 more.

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

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 637 (Diabetes with MCC, relative weight 1.4129), DRG 638 (Diabetes with CC, relative weight 0.9019) and DRG 639 (Diabetes without CC/MCC, relative weight 0.6376), 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 is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

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 249.00 (secondary diabetes mellitus without mention of complication, not stated as uncontrolled, or unspecified).

Notes that apply from higher levels

Instructions written at a parent level also apply to E08.9.

› From E08 Diabetes mellitus due to underlying condition
Excludes1
  • 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.-)
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.-)
Use additional code
  • 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)

Broader instructions also apply from Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to E08.9.

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.

MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 249.00Secondary diabetes mellitus without mention of complication, not stated as uncontrolled, or 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 E08.9

Is E08.9 billable?

Yes. E08.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E08.9 be used as a principal diagnosis?

No. It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

Is E08.9 a CC or MCC?

No. E08.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does E08.9 group to?

E08.9 is used in the MS-DRG v44.0 logic for MS-DRG 637 (Diabetes with MCC), MS-DRG 638 (Diabetes with CC) and MS-DRG 639 (Diabetes without CC/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 E08.9?

The CMS General Equivalence Mappings map E08.9 to ICD-9-CM 249.00.