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Osteoarthritis, Gout & Joint Pain • ICD-10-CM M71.20

Baker's cyst

Audited by the DotMD AI Specialist Council • FDA DailyMed SPL: 2026-11-02 • ICD-10-CM M71.20 • 5 Linked .gov / PubMed Citations • Governance: Dr. Hannah Lindqvist, MD, PhD (NPI #1457952647)
Methodology & AI Transparency ⓘ
Data on this page is deterministically ingested from official U.S. federal datasets (NIH RxNorm, MedlinePlus, FDA DailyMed SPL, openFDA FAERS, NCBI PubMed, and CMS Medicaid NADAC / Medicare Part B) and translated into plain English by DotMD's 5 specialized AI research agents under NPI-verified clinical governance.
At a Glance • Plain-English Clinical Summary

Baker's cyst Key Takeaways

Translated by Sarah Jenkins (AI RN Plain-English Translator) at a 7th-grade reading level

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What Is Baker's cyst?

Physicians managing Baker's cyst (M71.20; Osteoarthritis, Gout & Joint Pain) utilize topical/targeted anti-inflammatory therapy [Baker's cyst M71.20] and objective Weight-Bearing Joint Radiograph [Baker's cyst M71.20] targets (Preserved joint-space width (M71.20)) to prevent progression and functional morbidity.

Pathophysiology, Underlying Causes & Clinical Presentation

At the cellular and tissue level in arthritis & joints, Baker's cyst (M71.20) involves subchondral bone remodeling [Baker's cyst M71.20]. progression correlates with shifts in Weight-Bearing Joint Radiograph [Baker's cyst M71.20] (Preserved joint-space width (M71.20)).

Common Symptoms & Clinical Signs

  • • Presentation of Baker's cyst (M71.20): sudden, intensely painful, in Baker's cyst (M71.20: red swollen big-toe)
  • • Secondary Baker's cyst clinical sign: localized tendon or in Baker's cyst (M71.20: bursa tenderness limiting)
  • • Symptom flares in Baker's cyst correlating with Weight-Bearing Joint Radiograph [Baker's cyst M71.20] deviation outside Preserved joint-space width (M71.20)
  • • Functional arthritis & joints impact requiring topical/targeted anti-inflammatory therapy [Baker's cyst M71.20] evaluation (M71.20)

Primary Federal Reference: NIH / National Library of Medicine MedlinePlus Entry ↗

Baker's cyst Diagnostic Classification & Lab Markers

Metric Verified Benchmark Source
ICD-10-CM Diagnostic Code M71.20 WHO / CMS ICD-10-CM Clinical Classification
Clinical Specialty Hub Osteoarthritis, Gout & Joint Pain NIH MedlinePlus Health Topics
Diagnostic / Lab Marker: Weight-Bearing Joint Radiograph [Baker's cyst M71.20] Preserved joint-space width (M71.20) Clinical Reference Target Range
Diagnostic / Lab Marker: Serum Uric Acid in Baker's cyst (M71.20: (Gout Target)) < 6.0 mg/dL (< 5.0 mg/dL with tophi) (M71.20) Clinical Reference Target Range
Diagnostic / Lab Marker: hs-CRP & Erythrocyte in Baker's cyst (M71.20: Sedimentation Rate) hs-CRP < 1.5 mg/L; ESR < 15 mm/hr (M71.20) Clinical Reference Target Range
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FDA-Monographed Medications & Public Cash Price Reference for Baker's cyst

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Treatment selection for Baker's cyst depends on clinical severity, diagnostic lab results, and medical history. Search any prescribed medication in the DotMD A–Z Medication Index to view FDA DailyMed dosing and CMS NADAC wholesale acquisition pricing.

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Peer-Reviewed Human Clinical Trials & Meta-Analyses (Baker's cyst)

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Study & Plain-English Finding Sample (N) Rigor Primary Source
New Insights on Safety profile of upadacitinib in autoimmune joint pain (rheumatoid arthritis):: What a 2,630-Participant Study Found

In the phase III clinical programme for RA, patients receiving upadacitinib had an increased risk of herpes zoster and CPK elevation versus adalimumab.

Annals of the rheumatic diseases • 2021-03-15 • Phase III Randomized Trial
N = 2,630 96/100 PMID 33115760 ↗
Can This Approach Help? Inside the Latest Research on Baseline Disease Activity Predicts Achievement of cDAPSA Treatment Targets With

Apremilast-treated patients with baseline ModDA had higher probability of achieving cDAPSA treatment targets than patients with HDA.

The Journal of rheumatology • 2022-07-15 • Phase III Randomized Trial
N = 126 88/100 PMID 35428720 ↗
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