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Compare the published Medicare service mix of Yen Hsun Chen, MD with clinicians in the same registry specialty: Hand Surgery · Orthopedic Surgery (CMS).

CA · Exact areaEdit location

2024 published service data · 184 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Paul Thang Dinh, M.D.

Hand Surgery · Orthopedic Surgery (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
70%Service-mix similarityView profile →

Daniel Gittings

Hand Surgery · Orthopedic Surgery (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
68%Service-mix similarityView profile →

Joanne Helen Wang, MD

Hand Surgery · Orthopedic Surgery (CMS) · Simi Valley, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of wrist, minimum of 3 views (73110)
67%Service-mix similarityView profile →

Arush Arvin Patel, M.D.

Hand Surgery · Orthopedic Surgery · Osteopathic Manipulative Medicine (CMS) · Escondido, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of wrist, minimum of 3 views (73110)
65%Service-mix similarityView profile →

M Ramin Modabber, M.D.

Hand Surgery · Orthopedic Surgery (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of wrist, minimum of 3 views (73110)
64%Service-mix similarityView profile →

Mark N Halikis, MD

Hand Surgery (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
64%Service-mix similarityView profile →

Amar Arun Patel, MD

Orthopedic Surgery (CMS) · Laguna Woods, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
63%Service-mix similarityView profile →

Mark E. Elzik, M.D.

Orthopedic Surgery (CMS) · Mission Viejo, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
63%Service-mix similarityView profile →

Kenneth Mensch, MD

Hand Surgery (CMS) · Capitola, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of wrist, minimum of 3 views (73110)
63%Service-mix similarityView profile →

Jawad Khan, M.D.

Orthopedic Surgery (CMS) · Fountain Valley, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • X-ray of wrist, minimum of 3 views (73110)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
62%Service-mix similarityView profile →

John Theodore Schwartz, MD

Hand Surgery · Orthopedic Surgery (CMS) · Dublin, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Aspiration and/or injection of fluid from large joint (20610)
  • X-ray of wrist, minimum of 3 views (73110)
62%Service-mix similarityView profile →

Lonnie J Moskow, M.D.

Specialty details in registry · Laguna Woods, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)
  • Therapy procedure using manual technique, each 15 minutes (97140)
61%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.