FY2027 ICD-10-CM reference
E08.329: Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema. 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.
More specific FY2027 codes
- E08.3291: Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, right eyeBillable code
- E08.3292: Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, left eyeBillable code
- E08.3293: Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, bilateralBillable code
- E08.3299: Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema, unspecified eyeBillable 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).
Code first
the underlying condition, such as:
Source: E08 (category, inherited).
Code first
congenital rubella (P35.0)
Source: E08 (category, inherited).
Code first
Cushing's syndrome (E24.-)
Source: E08 (category, inherited).
Code first
cystic fibrosis (E84.-)
Source: E08 (category, inherited).
Code first
malignant neoplasm (C00-C96)
Source: E08 (category, inherited).
Code first
malnutrition (E40-E46)
Source: E08 (category, inherited).
Code first
pancreatitis and other diseases of the pancreas (K85-K86.-)
Source: E08 (category, inherited).
Instructional note
code to identify control using:
Source: E08 (category, inherited).
Instructional note
injectable non-insulin antidiabetic drugs (Z79.85)
Source: E08 (category, inherited).
Instructional note
insulin (Z79.4)
Source: E08 (category, inherited).
Instructional note
oral antidiabetic drugs (Z79.84)
Source: E08 (category, inherited).
Instructional note
oral hypoglycemic drugs (Z79.84)
Source: E08 (category, inherited).
Excludes1
drug or chemical induced diabetes mellitus (E09.-)
Source: E08 (category, inherited).
Excludes1
gestational diabetes (O24.4-)
Source: E08 (category, inherited).
Excludes1
neonatal diabetes mellitus (P70.2)
Source: E08 (category, inherited).
Excludes1
postpancreatectomy diabetes mellitus (E13.-)
Source: E08 (category, inherited).
Excludes1
postprocedural diabetes mellitus (E13.-)
Source: E08 (category, inherited).
Excludes1
secondary diabetes mellitus NEC (E13.-)
Source: E08 (category, inherited).
Excludes1
type 1 diabetes mellitus (E10.-)
Source: E08 (category, inherited).
Excludes1
type 2 diabetes mellitus (E11.-)
Source: E08 (category, inherited).
Instructional note
Diabetes mellitus due to underlying condition with nonproliferative diabetic retinopathy NOS
Source: E08.32 (self, inherited).
Seventh-character instruction
One of the following 7th characters is to be assigned to codes in subcategory E08.32 to designate laterality of the disease:
Source: E08.32 (self, inherited).
Instructional note
right eye
Source: E08.32 (self, inherited).
Instructional note
left eye
Source: E08.32 (self, inherited).
Instructional note
bilateral
Source: E08.32 (self, inherited).
Instructional note
unspecified eye
Source: E08.32 (self, inherited).
Seventh-character definitions
- 1: right eye
- 2: left eye
- 3: bilateral
- 9: unspecified eye
Compare the FY2027 additions, removals and billable-status changes
What does E08.329 mean in FY2027?
The official ICD-10-CM descriptor is Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy without macular edema. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is E08.329 billable in FY2027?
The FY2027 order file marks E08.329 as a nonbillable heading. Select a complete billable child code.
Does E08.329 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. Read the FY2027 Official Guidelines.
Review the FY2026 April edition