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Compare the published Medicare service mix of Serhan Karvar, MD with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

IOWA CITY, IA · Exact areaEdit location

2024 published service data · 21 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Jeffrey H Goldman, MD

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
50%Service-mix similarityView profile →

Ye-Jin Lee, MD

Gastroenterology (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
44%Service-mix similarityView profile →

Rami G. El Abiad, M.D.

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
44%Service-mix similarityView profile →

Mirac N. Ince, M.D.

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

Shared published services
1 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)
39%Service-mix similarityView profile →

Yehudith Assouline-Dayan, MD

Gastroenterology (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
38%Service-mix similarityView profile →

David E Elliott, MD PHD

Gastroenterology (CMS) · Iowa City, IA

Shared published services
1 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)
36%Service-mix similarityView profile →

Rintaro Hashimoto, MD PHD

Gastroenterology (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
34%Service-mix similarityView profile →

Caryn Berkowitz, MD

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

Shared published services
1 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)
33%Service-mix similarityView profile →

Henning Gerke, MD

Gastroenterology (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
33%Service-mix similarityView profile →

Mohamad Mokadem, M.D.

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

Shared published services
1 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)
32%Service-mix similarityView profile →

Amer El Sayed, M.D

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarityView profile →

Steven Ferenc Polyak, MD

Gastroenterology · Internal Medicine (CMS) · Iowa City, IA

Shared published services
1 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)
29%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.