2026 ICD-10-CM Diagnosis Code S30.86AAInsect bite (nonvenomous) of flank, initial encounter

ICD-10-CM Codes›S00–T88›S30-S39›S30

ICD-10-CM S30.86AA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S30.86AA is a billable ICD-10-CM diagnosis code for insect bite (nonvenomous) of flank, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607.

Code Identity

ICD-10-CM Code
S30.86AA
Billable Status
Yes — Valid for Submission
Code Describes
Insect bite (nonvenomous) of flank, initial encounter
Short Description
Insect bite (nonvenomous) of flank, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S30.86A
Insect bite (nonvenomous) of flank

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
CategoryS30Superficial injury of abdomen, lower back, pelvis and external genitals
This CodeS30.86AAInsect bite (nonvenomous) of flank, initial encounter

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of abdomen, lower back, pelvis and external genitals (S30). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Code History & ChangesHistory

New Code S30.86AA was added to the ICD-10-CM code set for FY 2026, effective October 1, 2025.

Replacement S30.86AA replaces the following previously assigned code(s):

  • S30.861A - Insect bite (nonvenomous) of abdominal wall, init encntr
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About S30.86AAOverview

Is S30.86AA (Insect bite (nonvenomous) of flank) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report insect bite (nonvenomous) of flank, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S30.86AA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for insect bite (nonvenomous) of flank, such as an emergency visit or first evaluation.

What MS-DRG does S30.86AA group to?

When insect bite (nonvenomous) of flank, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.