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Compare the published Medicare service mix of Leo E Orr, M.D. with clinicians in the same registry specialty: Hematology/Oncology (CMS).

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 92 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Ellsworth Raymond Grant, M.D

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Enhancing oncology model (eom) monthly enhanced oncology services (meos) payment for eom enhanced services (M0010)
  • Insertion of needle into vein for collection of blood sample (36415)
81%Service-mix similarityView profile →

Sungwon Rachel Kyung, M.D.

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
69%Service-mix similarityView profile →

Sidney Morris Stoll, D.O.

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
66%Service-mix similarityView profile →

John Anthony Glaspy, MD

Hematology/Oncology · Internal Medicine (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
65%Service-mix similarityView profile →

Lasika Chandradatta Seneviratne, M.D.

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
65%Service-mix similarityView profile →

Arati Rani Chand, M.D.

Hematology/Oncology · Internal Medicine (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
64%Service-mix similarityView profile →

David Berz, MD, PHD, MPH

Hematology/Oncology · Internal Medicine (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
64%Service-mix similarityView profile →

Robert Allen Vescio, M.D.

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
63%Service-mix similarityView profile →

Fukai Leo Chuang, M.D.

Hematology/Oncology · Internal Medicine (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
63%Service-mix similarityView profile →

Jason Szu-Chieh Ho, M.D.

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
63%Service-mix similarityView profile →

Sepehr Rokhsar, M.D.

Hematology/Oncology · Internal Medicine (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
63%Service-mix similarityView profile →

Alexander Hanjoon Song, MD

Hematology/Oncology (CMS) · Los Angeles, CA

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)
  • Injection of drug or substance under skin or into muscle (96372)
62%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.