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Compare the published Medicare service mix of Giorgos Loizidis, MD with clinicians in the same registry specialty: Internal Medicine · Rheumatology (CMS).

PHILADELPHIA, PA · Exact areaEdit location

2024 published service data · 52 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

David Ray Chen, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
46%Service-mix similarityView profile →

Jill Bishop Johnson, M.D.

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
42%Service-mix similarityView profile →

Shikha Rathi, MBBS, MD

Geriatric Medicine · Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
42%Service-mix similarityView profile →

James Udell, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
41%Service-mix similarityView profile →

Neal K Moskowitz, M.D., PH.D.

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
41%Service-mix similarityView profile →

Alan L. Epstein, M.D.

Internal Medicine · Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
40%Service-mix similarityView profile →

Bruce I Hoffman

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
39%Service-mix similarityView profile →

Lawrence Brent, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Aspiration and/or injection of fluid from large joint (20610)
38%Service-mix similarityView profile →

Kanchana Nilupul Herath, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)
  • Insertion of needle into vein for collection of blood sample (36415)
37%Service-mix similarityView profile →

Belinda K Birnbaum, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of chemotherapy into vein, 1 hour or less (96413)
35%Service-mix similarityView profile →

Arundathi Jayatilleke, MD

Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Aspiration and/or injection of fluid from large joint (20610)
34%Service-mix similarityView profile →

Alexis Stephanie Zavitsanos

Internal Medicine · Rheumatology (CMS) · Philadelphia, PA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
34%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.