A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Garry Chapman with clinicians in the same registry specialty: Certified Registered Nurse Anesthetist (Crna) (CMS).

OK · Exact areaEdit location

2024 published service data · 475 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Chaz White, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Tulsa, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
83%Service-mix similarityView profile →

Casey J Johnson, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Enid, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
83%Service-mix similarityView profile →

William Stewart, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Chickasha, OK

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
  • Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (64415)
72%Service-mix similarityView profile →

Christine Diane Harbert, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Lawton, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
71%Service-mix similarityView profile →

Julie Anne Knox, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Henryetta, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
71%Service-mix similarityView profile →

Giovanni Andrea Lovera, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Oklahoma City, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
71%Service-mix similarityView profile →

Sarah Duke, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Oklahoma City, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
70%Service-mix similarityView profile →

Stephanie M Gotcher, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · Tulsa, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
70%Service-mix similarityView profile →

Veronica Antonia Kirk

Certified Registered Nurse Anesthetist (Crna) (CMS) · Lawton, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
70%Service-mix similarityView profile →

Russell Earl Chandler, CRNA

Certified Registered Nurse Anesthetist (Crna) (CMS) · El Reno, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
66%Service-mix similarityView profile →

Traci Renee Wilmarth, CRNA

Specialty details in registry · Oklahoma City, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
65%Service-mix similarityView profile →

Zackary Cole Morgan, APRN-CRNA

Specialty details in registry · Altus, OK

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for exam of colon using an endoscope (00812)
65%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.