ICD10BillableValid for clinical use

ICD-10 Code M08.99: Juvenile arthritis, unspecified, multiple sites

M08.99 is a billable ICD-10 diagnosis code used to classify Juvenile arthritis, unspecified, multiple sites in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

  • May be used when a clinician documents juvenile arthritis, unspecified, multiple sites in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
13Diseases of the musculoskeletal system and connective tissue (M00-M99)
block
M00-M25Arthropathies
block
M05-M14Inflammatory polyarthropathies
category
M08Juvenile arthritis
category
M08.9Juvenile arthritis, unspecified
currentM08.9

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Orthopedic SpecialistRheumatologist

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
M08.99

Common synonyms

Juvenile arthritis, unspecified, multiple sitesJuvenile arthritis, unspecified

Frequently asked questions

Code details

CodeM08.99
SystemICD10
Display nameJuvenile arthritis, unspecified, multiple sites
ChapterDiseases of the musculoskeletal system and connective tissue (M00-M99)
BlockInflammatory polyarthropathies

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code M08.99 for Juvenile arthritis, unspecified, multiple sites | HealthAssure