ICDcodes.org
FY2027

E08.40 — Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecified

BillableUnspecified

Is E08.40 billable?

Yes, but E08.40 is an unspecified code. E08.40 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, E08.40 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting E08.40 — the more specific alternatives are listed below.

E08.40 at a glance

CodeE08.40
DescriptionDiabetes mellitus due to underlying condition with diabetic neuropathy, unspecified
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

What Medicare edits apply to E08.40?

The Medicare Code Editor screens inpatient claims before they are grouped. These edits name E08.40 directly.

Manifestation code — never sequenced first — MCE edit 6

This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.

Which MS-DRGs does E08.40 group to?

E08.40 sits in MDC Pre and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 008Simultaneous Pancreas, Islet Cell and Kidney Transplantsurgical

How is E08.40 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to E08.40. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Diabetes, diabetic › due to underlying condition › with › neuropathy (mellitus) (sugar)

Excludes1 — never code together — inherited from Chapter 4

The conditions below can never be reported together with E08.40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

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

Excludes1 — never code together — inherited from E08

The conditions below can never be reported together with E08.40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • 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 — inherited from E08

The underlying condition below must be sequenced before E08.40. E08.40 describes a manifestation and cannot be the principal or first-listed diagnosis.

  • 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 — inherited from E08

Report an additional code alongside E08.40 to fully describe the condition. E08.40 is sequenced first.

  • 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)

How long has E08.40 existed?

E08.40 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the E08.4 family? (5)