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Compare the published Medicare service mix of John H.h. Fisher, M.D. with clinicians in the same registry specialty: Nephrology (CMS).

CA · 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.

Jack E Rubin, M.D.

Internal Medicine · Nephrology (CMS) · Inglewood, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
89%Service-mix similarityView profile →

Paul Phillip Krasner, M.D.

Internal Medicine · Nephrology (CMS) · Anaheim, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
89%Service-mix similarityView profile →

Adam M Sun, MD

Nephrology (CMS) · Monterey Park, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
86%Service-mix similarityView profile →

Wen-Yuan Marieanne Chiang, D.O.

Internal Medicine · Nephrology (CMS) · South Gate, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
86%Service-mix similarityView profile →

Parag Arvind Shah, M.D

Internal Medicine · Nephrology (CMS) · Mission Hills, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
83%Service-mix similarityView profile →

Arashdeep Singh Poonia, M.D.

Internal Medicine · Nephrology (CMS) · Santa Maria, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
79%Service-mix similarityView profile →

Olu Oredugba, MD

Internal Medicine · Nephrology (CMS) · Inglewood, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
75%Service-mix similarityView profile →

Vijay K Jain, MD

Nephrology (CMS) · Concord, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
  • Dialysis services, 1 physician visit per month (20 years or older) (90962)
74%Service-mix similarityView profile →

Ramanath Dukkipati, M.D

Nephrology (CMS) · Northridge, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
74%Service-mix similarityView profile →

Jay Eriah Shankar, MD

Internal Medicine · Nephrology (CMS) · Victorville, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
72%Service-mix similarityView profile →

Eric L Cheung, M.D.

Nephrology (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
72%Service-mix similarityView profile →

P B Sagireddy, MD

Nephrology (CMS) · Stockton, CA

Shared published services
3 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
71%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.