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Compare the published Medicare service mix of Kathryn Amacher, DO with clinicians in the same registry specialty: Geriatric Medicine · Internal Medicine (CMS).

CA · Exact areaEdit location

2024 published service data · 217 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

John D Homan, MD

Geriatric Medicine · Hospitalist · Internal Medicine (CMS) · Huntington Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
69%Service-mix similarityView profile →

Seema S Rao, MD.

Geriatric Medicine · Internal Medicine (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
69%Service-mix similarityView profile →

Marcel S Filart, MD

Specialty details in registry · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
68%Service-mix similarityView profile →

Dzung Trinh, MD

Geriatric Medicine · Internal Medicine (CMS) · Fresno, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
58%Service-mix similarityView profile →

Anne V White, D.O.

Specialty details in registry · Santa Barbara, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
52%Service-mix similarityView profile →

Richard Thien Nguyen, M.D.

Geriatric Medicine · Internal Medicine (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)
51%Service-mix similarityView profile →

Stephen Michael Grossman, M.D.

Internal Medicine (CMS) · Fresno, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes (99307)
50%Service-mix similarityView profile →

Namita G. Kansal, MD

Specialty details in registry · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes (99307)
50%Service-mix similarityView profile →

Man Q. Vu, M.D.

Geriatric Medicine · Hospice/Palliative Care · Internal Medicine (CMS) · La Jolla, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
48%Service-mix similarityView profile →

Bettina Yvonne Chrysofakis-Baiduc, M.D.

Specialty details in registry · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)
47%Service-mix similarityView profile →

Michael Y Karapetian, M.D.

Internal Medicine (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
46%Service-mix similarityView profile →

Norman T Chien, MD

Geriatric Medicine (CMS) · Pasadena, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)
45%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.