M08.062 ICD-10-CM Code: Unspecified juvenile rheumatoid arthritis, left knee
M08.062 maps to CMS-HCC V28 93. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Inflammatory polyarthropathies (M05-M14)
M08.062
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceUnspecified juvenile rheumatoid arthritis, left knee
A type of arthritis that develops in children, affecting the left knee joint, causing inflammation and joint damage.
Buddy Insight
This code identifies juvenile rheumatoid arthritis with specific left knee involvement, representing a chronic pediatric inflammatory condition that impacts mobility and requires comprehensive disease management.
CMS-HCC V28
MappedHCC 93
Code-level coefficient reference
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
MappedHCC 056
Code-level coefficient reference
ESRD/PACE
MappedHCC 40
Code-level coefficient reference
RXHCC
MappedHCC 83
Code-level coefficient reference
Code Book Path
Inclusion Terms
Official- Juvenile rheumatoid arthritis with or without rheumatoid factorInherited from M08.0
Excludes 2
Official- arthropathic psoriasis (L40.5-)Inherited from M00-M99
- certain conditions originating in the perinatal period (P04-P96)Inherited from M00-M99
- certain infectious and parasitic diseases (A00-B99)Inherited from M00-M99
- compartment syndrome (traumatic) (T79.A-)Inherited from M00-M99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from M00-M99
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from M00-M99
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from M00-M99
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from M00-M99
- neoplasms (C00-D49)Inherited from M00-M99
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from M00-M99
Related Codes
Includes
OfficialNo Includes notes are included in this display for M08.062. Check the code and parent instructions in the Code Book.
Excludes 1
Official- arthropathy in Whipple's disease (M14.8)Inherited from M08
- Felty's syndrome (M05.0)Inherited from M08
- juvenile dermatomyositis (M33.0-)Inherited from M08
- psoriatic juvenile arthropathy (L40.54)Inherited from M08
Code First
OfficialNo Code First sequencing instructions are included in this display for M08.062. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for M08.062. Check the code and parent instructions in the Code Book.
Code Also
Official- any associated underlying condition, such as:Inherited from M08
- regional enteritis [Crohn's disease] (K50.-)Inherited from M08
- ulcerative colitis (K51.-)Inherited from M08
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is M08.062 an HCC code?
Yes. M08.062 (Unspecified juvenile rheumatoid arthritis, left knee) maps to HCC 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.617. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.
Coder answer: M08.062 is billable and maps to V28 HCC 93, Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- M08.062
- Description
- Unspecified juvenile rheumatoid arthritis, left knee
- HCC (V28)
- HCC 93 — Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders
- RAF reference coefficient
- 0.617
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work M08.062 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for M08.062
For M08.062, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Coder workflow notes
Get the V28 mapping + MEAT cheat sheet
One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
M08.062 is the ICD-10-CM diagnosis code for unspecified juvenile rheumatoid arthritis, left knee. A type of arthritis that develops in children, affecting the left knee joint, causing inflammation and joint damage. M08.062 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering inflammatory polyarthropathies (m05-m14).
Under the CMS-HCC V28 risk adjustment model, M08.062 maps to Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders (HCC 93) with a source-labeled community, non-dual, aged reference coefficient of 0.617. No V24 mapping is shown for M08.062; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.
Confirm left knee laterality is documented to differentiate from right knee involvement. For M08.062, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for M08.062 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm left knee laterality is documented to differentiate from right knee involvement
- •Check for any additional documentation that might specify the type of juvenile rheumatoid arthritis
Clinical Significance
This code identifies juvenile rheumatoid arthritis with specific left knee involvement, representing a chronic pediatric inflammatory condition that impacts mobility and requires comprehensive disease management. Early intervention is crucial to prevent long-term joint damage and growth abnormalities.
Documentation Requirements
- ✓Physician documentation of juvenile rheumatoid arthritis diagnosis
- ✓Specific identification of left knee joint involvement
- ✓Patient age at onset documented as under 16 years
- ✓Clinical evidence of chronic joint inflammation
- ✓Functional assessment of left knee mobility and pain
- ✓Documentation of systemic inflammatory markers when present
- ✓Treatment regimen including immunosuppressive therapy
- ✓Regular monitoring schedule for disease activity and complications