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Compare the published Medicare service mix of Charles Christopher Greim, MD with clinicians in the same registry specialty: Physical Medicine And Rehabilitation (CMS).

PITTSBURGH, PA · Exact areaEdit location

2024 published service data · 37 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Kali Webb

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
75%Service-mix similarityView profile →

Catherine Mary Birk, MD

Specialty details in registry · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
70%Service-mix similarityView profile →

Amanda Leigh Harrington, MD

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
60%Service-mix similarityView profile →

Max Hurwitz

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
57%Service-mix similarityView profile →

Brian Ernstoff, M.D.

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
57%Service-mix similarityView profile →

Molly Krause

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
48%Service-mix similarityView profile →

Julia Wu Wilcox, MD

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
48%Service-mix similarityView profile →

Maria F Twichell, MD

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
47%Service-mix similarityView profile →

Daniel M Malkamaki, MD

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
46%Service-mix similarityView profile →

Thomas Allen Franz, MD

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
44%Service-mix similarityView profile →

Alissa Ann Totman, MD, MPH

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
43%Service-mix similarityView profile →

James Martin Kreshon, DO

Physical Medicine And Rehabilitation (CMS) · Pittsburgh, PA

Shared published services
2 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)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
42%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.