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Compare the published Medicare service mix of Barnett J. W. Grier, M.D. with clinicians in the same registry specialty: Internal Medicine.

LOS ANGELES, 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.

Gayle V Mitchell, M.D

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
59%Service-mix similarityView profile →

Atheer A Razzouk, MD

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
29%Service-mix similarityView profile →

Anne Louise Peters, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
19%Service-mix similarityView profile →

Matthew Greg Lefferman, DO

Internal Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
  • Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes (99344)
19%Service-mix similarityView profile →

Shahriar Jarchi, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
  • Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes (99344)
18%Service-mix similarityView profile →

Mary B White, MD

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
15%Service-mix similarityView profile →

Keivan Golchini, MD

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes (99347)
15%Service-mix similarityView profile →

Shelly Chawla, MD

Internal Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes (99344)
  • Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes (99347)
14%Service-mix similarityView profile →

Michael Jacob Ghods, MD

Internal Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)
  • Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes (99344)
13%Service-mix similarityView profile →

Zab Mosenifar, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Test for exercise-induced lung stress (94618)
13%Service-mix similarityView profile →

Shuo Steven Wang, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes (99347)
8%Service-mix similarityView profile →

James Jinhong Yang, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes (99344)
4%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.