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Compare the published Medicare service mix of Debra L Walshaw, M.D. with clinicians in the same registry specialty: Internal Medicine.

TUCSON, AZ · Exact areaEdit location

2024 published service data · 285 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Alif Youseff Sarah, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
54%Service-mix similarityView profile →

Robert Betancourt, M.D.

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
52%Service-mix similarityView profile →

Fisseha Woldemariam, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
51%Service-mix similarityView profile →

Sassan Momtazbakhsh, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
50%Service-mix similarityView profile →

Jason L Schemp, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
49%Service-mix similarityView profile →

Bijay Sanjeev, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
48%Service-mix similarityView profile →

Mosab Abdulbaset Frefer, MD

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
47%Service-mix similarityView profile →

Nicholas R Bastiampillai, DO

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
47%Service-mix similarityView profile →

Andres Zhang-Molina, M.D.

Internal Medicine · Tucson, AZ

Shared published services
2 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)
  • Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)
47%Service-mix similarityView profile →

Kevin M Khouie, MD

Internal Medicine · Tucson, AZ

Shared published services
1 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)
43%Service-mix similarityView profile →

Ahmad Atal Shir, MD

Internal Medicine · Tucson, AZ

Shared published services
1 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)
43%Service-mix similarityView profile →

Norman Estrada Mendoza, M.D.

Internal Medicine · Tucson, AZ

Shared published services
1 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)
40%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.