2027 ICD-10-CM Diagnosis Code A39.82Meningococcal retrobulbar neuritis

ICD-10-CM Codes›A00–B99›A30-A49›A39

ICD-10-CM A39.82
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A39.82 is a billable ICD-10-CM diagnosis code for meningococcal retrobulbar neuritis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 123, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. Coders also document this condition as infection causing inflammation of optic nerve. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
A39.82
Billable Status
Yes — Valid for Submission
Code Describes
Meningococcal retrobulbar neuritis
Short Description
Meningococcal retrobulbar neuritis
Same as the full description in the CMS dataset.
Parent Code
A39.8
Other meningococcal infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA39Meningococcal infection
This CodeA39.82Meningococcal retrobulbar neuritis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infection causing inflammation of optic nerve
  • Meningococcal optic neuritis
  • Meningococcal retrobulbar neuritis
  • Retrobulbar neuritis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A39.82: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR EYE006
Neuro-ophthalmology
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Meningococcal Infections

    infections with bacteria of the species neisseria meningitidis.

Patient EducationClinical

Eye Infections

Your eyes can get infections from bacteria, fungi, or viruses. Eye infections can occur in different parts of the eye and can affect just one eye or both. Two common eye infections are:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A39.82 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
036.81 Meningococc optic neurit
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A39.82Overview

What is the ICD-10 code for meningococcal retrobulbar neuritis?

The ICD-10-CM code for meningococcal retrobulbar neuritis is A39.82 (sometimes written as A3982). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A39.82 (Other meningococcal infections) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report meningococcal retrobulbar neuritis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does A39.82 group to?

When meningococcal retrobulbar neuritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 123, with relative weights from 0.8218 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A39.82 a CC or MCC?

CMS lists A39.82 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.

What is the ICD-9 equivalent of A39.82?

Under the General Equivalence Mappings, meningococcal retrobulbar neuritis converts to ICD-9-CM 036.81 (meningococc optic neurit). The mapping is approximate, so confirm the match fits the documentation.