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

YORBA LINDA, CA · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 44 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

April Choi, MD

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
88%Service-mix similarity~9.2 milesView profile →

Jeffrey Ahn, M.D.

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
86%Service-mix similarity~9.2 milesView profile →

Nishant Munugala, MD, MPH

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
85%Service-mix similarity~9.2 milesView profile →

Sandy Liu, M.D.

Hematology/Oncology · Internal Medicine (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
74%Service-mix similarity~9.2 milesView profile →

Nicole Foley, M.D.

Hematology/Oncology (CMS) · Orange, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
74%Service-mix similarity~9.2 milesView profile →

Shirin Attarian, M.D.

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
73%Service-mix similarity~9.2 milesView profile →

Misako Nagasaka, MD

Hematology/Oncology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
67%Service-mix similarity~9.2 milesView profile →

Miguel A. Villalona Calero, M.D.

Hematology/Oncology · Medical Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
65%Service-mix similarity~9.2 milesView profile →

Fa-Chyi Lee, M.D.

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
63%Service-mix similarity~9.2 milesView profile →

Arash Rezazadeh Kalebasty, M.D.

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
62%Service-mix similarity~9.2 milesView profile →

Nataliya Mar, MD

Hematology/Oncology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
59%Service-mix similarity~9.2 milesView profile →

Roy Logarta Panares, MD

Hematology/Oncology (CMS) · Fullerton, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
59%Service-mix similarity~7.3 milesView 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 approximate distance 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.