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Compare the published Medicare service mix of Frederick C Johlin, MD with clinicians in the same registry specialty: Specialty details in registry.

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.

Rintaro Hashimoto, MD PHD

Gastroenterology (CMS) · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Insertion of stent into pancreatic or bile duct using a flexible endoscope (43274)
56%Service-mix similarityView profile →

Munish Ashat, M.D.

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

Shared published services
3 shared services · view billing descriptions
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Insertion of stent into pancreatic or bile duct using a flexible endoscope (43274)
  • Incision of pancreatic outlet using a flexible endoscope (43262)
39%Service-mix similarityView profile →

Dean A Abramson, MD

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
35%Service-mix similarityView profile →

Divya Ashat, M.D.

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
28%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
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
27%Service-mix similarityView profile →

Jeffrey H Goldman, MD

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
26%Service-mix similarityView profile →

Avraham Levin, M.D.

Gastroenterology (CMS) · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
26%Service-mix similarityView profile →

David E Elliott, MD PHD

Gastroenterology (CMS) · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
26%Service-mix similarityView profile →

Mohamad Mokadem, M.D.

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
23%Service-mix similarityView profile →

Steven Ferenc Polyak, MD

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
23%Service-mix similarityView profile →

Amer El Sayed, M.D

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
22%Service-mix similarityView profile →

Masaaki Kurahashi, MD

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

Shared published services
1 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
16%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.