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Compare the published Medicare service mix of Warren Philip Johnson, MD with clinicians in the same registry specialty: Emergency Medicine.

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.

Nicholas Saade, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Jon Haynes, M.D.

Emergency Medicine · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Sean Hampton Oldroyd, D.O.

Emergency Medicine · Visalia, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Natalie Simone Hoover, M.D.

Emergency Medicine · Carmichael, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Dwight B. Stalker, MD

Emergency Medicine · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Abram Levin, MD

Emergency Medicine · Davis, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Brennan Gibbs, MD

Emergency Medicine · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Patrick Lenehan, M.D.

Emergency Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Sidney Laman James, D.O.

Emergency Medicine · Fresno, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Daena Sarah Watcha, MD, MS

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Preya S Sheth

Emergency Medicine · Roseville, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Kerilee Wenker, MD

Emergency Medicine · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
100%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.