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ICD-10-CM E11.8: Type 2 diabetes mellitus with unspecified complications

E11.8 is the billable ICD-10-CM code for type 2 diabetes mellitus with unspecified complications, in category E11 (Type 2 diabetes mellitus) of the Diabetes mellitus section. As a principal diagnosis it groups to MS-DRG 008 Simultaneous Pancreas, Islet Cell and Kidney Transplant, MS-DRG 010 Pancreas or Islet Cell Transplant, MS-DRG 019 Simultaneous Pancreas, Islet Cell and Kidney Transplant with Hemodialysis (MDC PRE Pre-MDC (transplants, tracheostomy, ECMO)); or MS-DRG 637 Diabetes with MCC, MS-DRG 638 Diabetes with CC, MS-DRG 639 Diabetes without CC/MCC (MDC 10 MDC 10: Endocrine, Nutritional and Metabolic Diseases and Disorders). It maps to HCC 38 (Diabetes with Glycemic, Unspecified, or No Complications) in CMS-HCC V28. 23 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
E11.8
billable FY2027 ICD-10-CM code
Category
E11 Type 2 diabetes mellitus
Chapter
4: Endocrine, nutritional and metabolic diseases (E00-E89)
CC/MCC (MS-DRG v44)
Neither
CMS-HCC V28
HCC 38
POA reporting
Required

Tabular list notes for E11.8

The tabular list has no notes on E11.8 itself; the notes below apply from its parent headings.

Inherited from E11 (Type 2 diabetes mellitus)

Includes
  • diabetes (mellitus) due to insulin secretory defect
  • diabetes NOS
  • insulin resistant diabetes (mellitus)
Excludes1 (never coded together)
  • diabetes mellitus due to underlying condition (E08.-)
  • 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.-)
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)

MS-DRG grouping when E11.8 is the principal diagnosis

MS-DRG v44 groups for E11.8 as principal diagnosis
MDCMS-DRGs
PRE Pre-MDC (transplants, tracheostomy, ECMO)008010019
10 MDC 10: Endocrine, Nutritional and Metabolic Diseases and Disorders637638639

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for E11.8 shows the full grouping logic.

CC/MCC status and inpatient edits

E11.8 is neither a CC nor an MCC under MS-DRG v44, so as a secondary diagnosis it does not raise the MS-DRG severity level. Check E11.8 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.

CMS-HCC V28 risk adjustment

In the PY2027 mapping, E11.8 maps to HCC 38 (Diabetes with Glycemic, Unspecified, or No Complications). The HCC lookup shows the RAF weight and the hierarchy.

LCD billing and coding articles that list E11.8

23 current Medicare billing and coding articles list E11.8 among the diagnoses that support medical necessity for the services they cover.

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Frequently asked questions

What does ICD-10-CM E11.8 mean?

E11.8 means type 2 diabetes mellitus with unspecified complications. It is one of 25 billable codes under E11, type 2 diabetes mellitus.

What can't be coded with E11.8?

Excludes1 at E11: diabetes mellitus due to underlying condition (E08.-); drug or chemical induced diabetes mellitus (E09.-); gestational diabetes (O24.4-); neonatal diabetes mellitus (P70.2) and 4 more. These are never reported together with E11.8.

Which MS-DRG does E11.8 group to?

As the principal diagnosis, E11.8 groups to MS-DRG 008 Simultaneous Pancreas, Islet Cell and Kidney Transplant, MS-DRG 010 Pancreas or Islet Cell Transplant, MS-DRG 019 Simultaneous Pancreas, Islet Cell and Kidney Transplant with Hemodialysis (MDC PRE Pre-MDC (transplants, tracheostomy, ECMO)); or MS-DRG 637 Diabetes with MCC, MS-DRG 638 Diabetes with CC, MS-DRG 639 Diabetes without CC/MCC (MDC 10 MDC 10: Endocrine, Nutritional and Metabolic Diseases and Disorders) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Does E11.8 map to an HCC?

Yes: HCC 38, Diabetes with Glycemic, Unspecified, or No Complications, in the PY2027 CMS-HCC V28 mapping.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.