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Compare the published Medicare service mix of James K Mangan, MD with clinicians in the same registry specialty: Hematology/Oncology (CMS).

SAN DIEGO, CA · Exact areaEdit location

2024 published service data · 53 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Annette Von Drygalski, MD

Hematology/Oncology · Internal Medicine (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
68%Service-mix similarityView profile →

Tiffany Nicole Tanaka, M.D.

Hematology/Oncology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
67%Service-mix similarityView profile →

Ah-Reum Jeong, MD

Hematology/Oncology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
63%Service-mix similarityView profile →

Dan Samuel Kaufman, MD

Hematology (CMS) · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
62%Service-mix similarityView profile →

Ezra E Cohen, MD

Hematology/Oncology (CMS) · San Diego, 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)
59%Service-mix similarityView profile →

Caitlin Costello, M.D.

Hematology/Oncology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
52%Service-mix similarityView profile →

Rana Ramzi Mckay, MD

Hematology/Oncology (CMS) · San Diego, 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)
  • Advance care planning, first 30 minutes (99497)
50%Service-mix similarityView profile →

Sandip Pravin Patel, M.D.

Hematology/Oncology (CMS) · San Diego, 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)
  • Advance care planning, first 30 minutes (99497)
49%Service-mix similarityView profile →

Jeremy Scott Chang, M.D.

Hematology/Oncology (CMS) · San Diego, 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)
  • Advance care planning, first 30 minutes (99497)
48%Service-mix similarityView profile →

Peter Vu, M.D.

Hematology/Oncology · Internal Medicine (CMS) · San Diego, 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)
  • Advance care planning, first 30 minutes (99497)
45%Service-mix similarityView profile →

Paul Timothy Fanta, MD

Hematology/Oncology (CMS) · San Diego, 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)
43%Service-mix similarityView profile →

Ann Marie Moeller, M.D.

Geriatric Medicine · Hospitalist (CMS) · San Diego, 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)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
39%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.