FY2027 ICD-10-CM reference
E13: Other specified diabetes mellitus
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Other specified diabetes mellitus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
Oct to Dec 2026, PY2027
CMS-HCC V28
Not applicableCMS-HCC V24
Not applicableESRD
Not applicableRxHCC
Not applicablePACE (CMS-HCC V22 component)
Not applicablePACE ESRD (ESRD V21 component)
Not applicablePACE RxHCC (2018/2019 component)
Not applicableJan to Sep 2027, PY2028
CMS-HCC V28
Not applicableCMS-HCC V24
Not applicableESRD
Not applicableRxHCC
Not applicablePACE (CMS-HCC V22 component)
Not applicablePACE ESRD (ESRD V21 component)
Not applicablePACE RxHCC component
Not applicableOct to Dec 2026, BY2026
HHS-HCC
Not applicableJan to Sep 2027, BY2027
HHS-HCC
Not applicableMore specific FY2027 codes
- E13.0: Other specified diabetes mellitus with hyperosmolarityNonbillable heading
- E13.1: Other specified diabetes mellitus with ketoacidosisNonbillable heading
- E13.2: Other specified diabetes mellitus with kidney complicationsNonbillable heading
- E13.3: Other specified diabetes mellitus with ophthalmic complicationsNonbillable heading
- E13.4: Other specified diabetes mellitus with neurological complicationsNonbillable heading
- E13.5: Other specified diabetes mellitus with circulatory complicationsNonbillable heading
- E13.6: Other specified diabetes mellitus with other specified complicationsNonbillable heading
- E13.8: Other specified diabetes mellitus with unspecified complicationsBillable code
- E13.9: Other specified diabetes mellitus without complicationsBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional 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.
Source: E00-E89 (chapter, inherited).
Excludes1
transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Source: E00-E89 (chapter, inherited).
Includes
diabetes mellitus due to genetic defects of beta-cell function
Source: E13 (category, direct).
Includes
diabetes mellitus due to genetic defects in insulin action
Source: E13 (category, direct).
Includes
postpancreatectomy diabetes mellitus
Source: E13 (category, direct).
Includes
postprocedural diabetes mellitus
Source: E13 (category, direct).
Includes
secondary diabetes mellitus NEC
Source: E13 (category, direct).
Instructional note
code to identify control using:
Source: E13 (category, direct).
Instructional note
injectable non-insulin antidiabetic drugs (Z79.85)
Source: E13 (category, direct).
Instructional note
insulin (Z79.4)
Source: E13 (category, direct).
Instructional note
oral antidiabetic drugs (Z79.84)
Source: E13 (category, direct).
Instructional note
oral hypoglycemic drugs (Z79.84)
Source: E13 (category, direct).
Excludes1
diabetes (mellitus) due to autoimmune process (E10.-)
Source: E13 (category, direct).
Excludes1
diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction (E10.-)
Source: E13 (category, direct).
Excludes1
diabetes mellitus due to underlying condition (E08.-)
Source: E13 (category, direct).
Excludes1
drug or chemical induced diabetes mellitus (E09.-)
Source: E13 (category, direct).
Excludes1
gestational diabetes (O24.4-)
Source: E13 (category, direct).
Excludes1
neonatal diabetes mellitus (P70.2)
Source: E13 (category, direct).
Excludes1
type 1 diabetes mellitus (E10.-)
Source: E13 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does E13 mean in FY2027?
The official ICD-10-CM descriptor is Other specified diabetes mellitus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is E13 billable in FY2027?
The FY2027 order file marks E13 as a nonbillable heading. Select a complete billable child code.
Does E13 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition