D86.86 ICD-10-CM Code: Sarcoid arthropathy
D86.86 maps to CMS-HCC V28 93 (RAF 0.617). Documentation must support MEAT. 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 blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) / Certain disorders involving the immune mechanism (D80-D89)
D86.86
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceSarcoid arthropathy
Joint inflammation and arthritis caused by sarcoidosis, typically affecting the ankles, knees, and other joints, causing pain and swelling.
Buddy Insight
Sarcoid arthropathy is a musculoskeletal manifestation of sarcoidosis that can present as acute or chronic joint inflammation, affecting approximately 25-40% of sarcoidosis patients.
CMS-HCC V28
MappedHCC 93
RAF 0.617
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Polyarthritis in sarcoidosis
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D86.86 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D86.86 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D86.86 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D86.86 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D86.86 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D86.86 in this effective period.
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 D86.86 an HCC code?
Yes. D86.86 (Sarcoid arthropathy) maps to Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders under the CMS-HCC V28 risk adjustment model, with a community non-dual aged RAF of 0.617. It is billable for payment year 2026.
Coder answer: D86.86 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
- D86.86
- Description
- Sarcoid arthropathy
- HCC (V28)
- HCC 93 — Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders
- RAF
- 0.617
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
Each model's RAF is its CMS base weight for that model's standard population, so 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 segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
Work D86.86 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for D86.86
For D86.86 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- 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
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed D86.86 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
D86.86 is the ICD-10-CM diagnosis code for sarcoid arthropathy. Joint inflammation and arthritis caused by sarcoidosis, typically affecting the ankles, knees, and other joints, causing pain and swelling. D86.86 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering certain disorders involving the immune mechanism (d80-d89).
Under the CMS-HCC V28 risk adjustment model, D86.86 maps to Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders (HCC 93) with a community, non-dual, aged base RAF weight of 0.617. D86.86 was not retained as a payment HCC under the older V24 model, so V28 introduced or recategorized it during the 2024–2026 phase-in. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Specify which joints are involved when documentation permits. Because D86.86 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, and MEAT documentation criteria for D86.86 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Specify which joints are involved when documentation permits
- •Do not confuse with rheumatoid arthritis; confirm sarcoidosis as the primary cause
Clinical Significance
Sarcoid arthropathy is a musculoskeletal manifestation of sarcoidosis that can present as acute or chronic joint inflammation, affecting approximately 25-40% of sarcoidosis patients. Acute sarcoid arthritis often accompanies Lofgren syndrome (bilateral hilar lymphadenopathy, erythema nodosum, and polyarthralgia), while chronic sarcoid arthropathy can cause persistent joint damage. The condition requires distinction from other inflammatory arthropathies for appropriate management.
Documentation Requirements
- ✓The provider must document sarcoidosis as the confirmed etiology of the arthropathy, specifying affected joints and whether the presentation is acute or chronic.
- ✓Documentation should include supporting evidence such as elevated angiotensin-converting enzyme levels, imaging findings, and any biopsy results confirming non-caseating granulomas.
- ✓Current treatment and functional impact should be noted.
Commonly Confused Codes
- •M06.9 (Rheumatoid arthritis, unspecified) may be confused when sarcoid arthropathy mimics rheumatoid arthritis clinically.
- •M13.80 (Other specified arthritis, unspecified site) is a less specific alternative that should not be used when sarcoid etiology is documented.
- •D86.89 (Sarcoidosis of other sites) should not be used for joint involvement when D86.86 provides greater specificity.