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Compare the published Medicare service mix of Jessica Lee Iwalani Johns, M.D. with clinicians in the same registry specialty: Obstetrics & Gynecology.

WALNUT CREEK, CA · Exact areaEdit location

2024 published service data · 16 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Yaron Friedman, M.D.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
61%Service-mix similarityView profile →

Madhavi Durga Vemulapalli, MD

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
59%Service-mix similarityView profile →

Shannon Eileen Sullivan-Cramer, M.D.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
57%Service-mix similarityView profile →

Janette G Walker, MD

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
56%Service-mix similarityView profile →

Sari Jane Kasper, D.O.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
55%Service-mix similarityView profile →

Nicole Sadika Yee, M.D.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
54%Service-mix similarityView profile →

Stephen R Wells, MD

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
52%Service-mix similarityView profile →

Mindy Plotkin, MD

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
51%Service-mix similarityView profile →

Timothy A Leach, M.D. FACOG

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
46%Service-mix similarityView profile →

Janine E Senior, MD

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
45%Service-mix similarityView profile →

Nadine Barbara Hanna, M.D.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
44%Service-mix similarityView profile →

Gerald Frank Katz, M.D.

Obstetrics & Gynecology · Walnut Creek, CA

Shared published services
1 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
41%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.