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Compare the published Medicare service mix of Jonathan Gelber, M.D. with clinicians in the same registry specialty: Orthopedic Surgery (CMS).

CA · Exact areaEdit location

2024 published service data · 263 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Clinton John Soppe, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
92%Service-mix similarityView profile →

Connor Larose, M.D.

Orthopedic Surgery (CMS) · Redlands, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
92%Service-mix similarityView profile →

Ralph Anthony Gambardella, MD

Orthopedic Surgery · Sports Medicine (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
92%Service-mix similarityView profile →

Erik Scott Stark, MD

Orthopedic Surgery (CMS) · Oceanside, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
90%Service-mix similarityView profile →

Bert R Mandelbaum, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
90%Service-mix similarityView profile →

Charles Francis Preston, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Walnut Creek, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
88%Service-mix similarityView profile →

Thomas P Knapp, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
86%Service-mix similarityView profile →

Connor Mitchell Delman

Orthopedic Surgery · Sports Medicine (CMS) · Van Nuys, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
86%Service-mix similarityView profile →

Jeffrey A Orr, MD

Orthopedic Surgery (CMS) · South Lake Tahoe, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
86%Service-mix similarityView profile →

Ekaterina Urch, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
86%Service-mix similarityView profile →

Lucas Raymond King

Orthopedic Surgery (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
85%Service-mix similarityView profile →

Russell Marc Nord, M.D.

Orthopedic Surgery · Sports Medicine (CMS) · Fremont, CA

Shared published services
3 shared services · view billing descriptions
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of knee, 4 or more views (73564)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
85%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.