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Compare the published Medicare service mix of Jose A Diaz, M.D. with clinicians in the same registry specialty: Surgery.

IL · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Anastasia Cisneros-Frausto, MD

Surgery · Skokie, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Removal of tissue from wound, 20.0 sq cm or less (97597)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
75%Service-mix similarityView profile →

Vinay V Bajaj, M.D.

Surgery · Kankakee, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less (15271)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
74%Service-mix similarityView profile →

Eric Yang, MD

Surgery · La Grange Highlands, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Removal of tissue from wound, 20.0 sq cm or less (97597)
  • Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less (15271)
70%Service-mix similarityView profile →

Jeffrey Lincoln Brown, MD

Surgery · Kankakee, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of tissue from wound, 20.0 sq cm or less (97597)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
59%Service-mix similarityView profile →

Rafael R Castro, MD FACS

Surgery · Freeport, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
56%Service-mix similarityView profile →

Timothy Mark Ruff, MD

Surgery · Jerseyville, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Removal of tissue from wound, 20.0 sq cm or less (97597)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
54%Service-mix similarityView profile →

Howard Clark Federer, M.D.

Surgery · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
53%Service-mix similarityView profile →

Steven S Kim, M.D.

Surgery · Mchenry, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
53%Service-mix similarityView profile →

Mary E Keller, M.D.

Surgery · Rockford, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of tissue from wound, 20.0 sq cm or less (97597)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
53%Service-mix similarityView profile →

Keith M Monson, M.D.

Surgery · Aurora, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
52%Service-mix similarityView profile →

Katherine Facklis Kouvelis, MD

Surgery · Aurora, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
50%Service-mix similarityView profile →

Ashlea L Canady, M.D.

Surgery · Sterling, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
49%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.