HCPList Know more before you call. About
A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Nicholas Thomas Trapp, M.D. with clinicians in the same registry specialty: Psychiatry.

IOWA CITY, IA · Exact areaEdit location

2024 published service data · 42 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Holly Marie Van Den Beldt, M.D.

Psychiatry · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Therapy using electrical currents (90870)
  • Treatment using magnetic field to stimulate nerve cells in brain, subsequent delivery and management (90868)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
85%Service-mix similarityView profile →

Erin M Crocker, MD

Psychiatry · Iowa City, IA

Shared published services
2 shared services · view billing descriptions
  • Therapy using electrical currents (90870)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
80%Service-mix similarityView profile →

Mark John Niciu, MD PHD

Psychiatry · Iowa City, IA

Shared published services
2 shared services · view billing descriptions
  • Therapy using electrical currents (90870)
  • Treatment using magnetic field to stimulate nerve cells in brain, subsequent delivery and management (90868)
68%Service-mix similarityView profile →

Anthony Purgianto

Psychiatry · Iowa City, IA

Shared published services
2 shared services · view billing descriptions
  • Therapy using electrical currents (90870)
  • Treatment using magnetic field to stimulate nerve cells in brain, subsequent delivery and management (90868)
64%Service-mix similarityView profile →

Samuel K Shultz, M.D.

Psychiatry · Iowa City, IA

Shared published services
2 shared services · view billing descriptions
  • Therapy using electrical currents (90870)
  • Treatment using magnetic field to stimulate nerve cells in brain, subsequent delivery and management (90868)
63%Service-mix similarityView profile →

John Tyler Philip Liggins, M.D.

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
45%Service-mix similarityView profile →

Nancy A Williams, MD

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
43%Service-mix similarityView profile →

Robert Philibert, MD PHD

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
42%Service-mix similarityView profile →

Evan Ouyang, MD

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
39%Service-mix similarityView profile →

Amanda Mary Forystek, M.D.

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
38%Service-mix similarityView profile →

Navya Spurthi Thatikonda, MDPHD

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
38%Service-mix similarityView profile →

Aislinn J Williams, M.D., PH.D.

Psychiatry · Iowa City, IA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
34%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.