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Compare the published Medicare service mix of Robert S Katz, M.D. with clinicians in the same registry specialty: Internal Medicine · Rheumatology (CMS).

CHICAGO, IL · Exact areaEdit location

2024 published service data · 60 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Ben J Small, MD

Internal Medicine · Rheumatology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Measurement of antibody for assessment of autoimmune disorder, any method (86235)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Insertion of needle into vein for collection of blood sample (36415)
88%Service-mix similarityView profile →

Alexandra Small, M.D.

Internal Medicine · Rheumatology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Measurement of antibody for assessment of autoimmune disorder, any method (86235)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Insertion of needle into vein for collection of blood sample (36415)
87%Service-mix similarityView profile →

David M Mael, M.D.

Internal Medicine · Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Aspiration and/or injection of fluid from large joint (20610)
46%Service-mix similarityView profile →

Osman J Bhatty, MD

Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Aspiration and/or injection of fluid from large joint (20610)
42%Service-mix similarityView profile →

Manish Jain, M.D.

Internal Medicine · Rheumatology (CMS) · Chicago, IL

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)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
  • Aspiration and/or injection of fluid from large joint (20610)
38%Service-mix similarityView profile →

Saba Ahmed

Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Aspiration and/or injection of fluid from large joint (20610)
37%Service-mix similarityView profile →

Laarni Quimson, D.O.

Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Aspiration and/or injection of fluid from large joint (20610)
35%Service-mix similarityView profile →

Eric Ruderman, MD

Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)
35%Service-mix similarityView profile →

Robert Steven Woodrick, MD

Internal Medicine · Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)
34%Service-mix similarityView profile →

Monica Mihaela Aloman, MD

Internal Medicine · Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
34%Service-mix similarityView profile →

Rediet Kokebie, MD

Internal Medicine · Rheumatology (CMS) · Chicago, IL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
33%Service-mix similarityView profile →

Maria C Sosenko

Rheumatology (CMS) · Chicago, IL

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Aspiration and/or injection of fluid from large joint (20610)
31%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.