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Compare the published Medicare service mix of Judith Anne Gurdian, MD with clinicians in the same registry specialty: Obstetrics & Gynecology.

ROCKVILLE, MD · Exact areaEdit location

2024 published service data · 31 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Diane Audrey Laurin, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
90%Service-mix similarityView profile →

Gerald R Renzi, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
88%Service-mix similarityView profile →

Barbara Jean Butler, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
87%Service-mix similarityView profile →

Michelle Spector, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Urinalysis, manual test (81002)
76%Service-mix similarityView profile →

Steven Maggid, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
74%Service-mix similarityView profile →

Tanya Shlomit Ghatan, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Pelvic exam (99459)
73%Service-mix similarityView profile →

Alice Marie Chapman, M.D.

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
  • Pelvic exam (99459)
71%Service-mix similarityView profile →

Dorothy Chiu Lee, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Urinalysis, manual test (81002)
  • Pelvic exam (99459)
70%Service-mix similarityView profile →

David H Grossman, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Urinalysis, manual test (81002)
  • Pelvic exam (99459)
70%Service-mix similarityView profile →

Venktesh Ashok Rangnath, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Assessment of emotional or behavioral problems (96127)
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous (G0328)
70%Service-mix similarityView profile →

Cheryl N Silverbrook, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Pelvic exam (99459)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
66%Service-mix similarityView profile →

Thu Ngoc Tran, MD

Obstetrics & Gynecology · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)
  • Urinalysis, manual test (81002)
  • Pelvic exam (99459)
64%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.