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Compare the published Medicare service mix of Donald F Nortman, MD with clinicians in the same registry specialty: Nephrology (CMS).

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 96 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Abe Green, MD

Specialty details in registry · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Phosphate level (84100)
  • Blood test, comprehensive group of blood chemicals (80053)
79%Service-mix similarityView profile →

Guita Balakhane, M.D.,

Geriatric Medicine · Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Phosphate level (84100)
  • Magnesium level (83735)
77%Service-mix similarityView profile →

Payman Vahedifar, M.D

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Phosphate level (84100)
65%Service-mix similarityView profile →

Alan D Dauer, M.D.,

Specialty details in registry · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
31%Service-mix similarityView profile →

Michael Joseph Blumenkrantz, M.D.

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
30%Service-mix similarityView profile →

Susanne Bernadette Nicholas, MD

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
29%Service-mix similarityView profile →

Larry Froch, MD

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
28%Service-mix similarityView profile →

Stuart Friedman, M.D.

Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
26%Service-mix similarityView profile →

Aylin Selek, M.D.

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
23%Service-mix similarityView profile →

Behnoud Beroukhim, M.D.

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
23%Service-mix similarityView profile →

Richard Srularon Horowitz, M.D.

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
23%Service-mix similarityView profile →

Grace Choi

Internal Medicine · Nephrology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
22%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.