2026 ICD-10-CM Diagnosis Code M46.30Infection of intervertebral disc (pyogenic), site unspecified

ICD-10-CM Codes›M00–M99›M45-M49›M46

ICD-10-CM M46.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M46.30 is a billable ICD-10-CM diagnosis code for infection of intervertebral disc (pyogenic), site unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 456 through 458, 539 through 541. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M46.30
Billable Status
Yes — Valid for Submission
Code Describes
Infection of intervertebral disc (pyogenic), site unspecified
Short Description
Infection of intervertebral disc (pyogenic), site unsp
Parent Code
M46.3
Infection of intervertebral disc (pyogenic)

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM45-M49Spondylopathies
CategoryM46Other inflammatory spondylopathies
This CodeM46.30Infection of intervertebral disc (pyogenic), site unspecified

Code EditsBilling

Medicare Code Editor checks that affect claim validity for M46.30.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Arthropathy associated with viral disease
  • Bacterial arthritis of vertebral column
  • Fungal arthritis
  • Infection of intervertebral disc - pyogenic
  • Infection of intervertebral disc caused by bacterium
  • Infection of intervertebral disc caused by parasite
  • Infective discitis
  • Inflammation of intervertebral disc caused by fungus
  • Mycobacterial discitis
  • Viral discitis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Infection, infected, infective(opportunistic)
      • intervertebral disc, pyogenic

Clinical ClassificationClinical

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

CCSR MUS011
Spondylopathies/spondyloarthropathy (including infective)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spine Injuries and Disorders

Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:

Read the full article at MedlinePlus

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

Convert M46.30 to ICD-9-CMHistory

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

ICD-9-CM
730.98 Bone infect NOS-oth site
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M46.30Overview

Is M46.30 (Infection of intervertebral disc (pyogenic)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infection of intervertebral disc (pyogenic), site unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M46.30 group to?

When infection of intervertebral disc (pyogenic), site unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 456, 457, 458, 539, 540, 541, with relative weights from 0.7715 to 8.4034 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M46.30?

Under the General Equivalence Mappings, infection of intervertebral disc (pyogenic), site unspecified converts to ICD-9-CM 730.98 (bone infect NOS-oth site). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.