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 John W Holden, M.D. with clinicians in the same registry specialty: Internal Medicine.

PONCA CITY, OK · 50 milesEdit location
Within 50 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 14 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

John David Williams, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Blood test, lipids (cholesterol and triglycerides) (80061)
  • Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)
50%Service-mix similarity~41.8 milesView profile →

Steven W. Cummings, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Administration of influenza virus vaccine (G0008)
47%Service-mix similarity~41.8 milesView profile →

Christopher A Shearer, DO

Internal Medicine · Enid, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Hemoglobin a1c level (83036)
42%Service-mix similarity~48.0 milesView profile →

Jon Mark Johnson, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)
  • Insertion of needle into vein for collection of blood sample (36415)
41%Service-mix similarity~41.8 milesView profile →

Cathy Nieman, MD

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)
40%Service-mix similarity~41.8 milesView profile →

Daniel Dean Washburn, MD

Internal Medicine · Enid, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Hemoglobin a1c level (83036)
  • Administration of influenza virus vaccine (G0008)
37%Service-mix similarity~48.0 milesView profile →

Woody G Jenkins, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Administration of influenza virus vaccine (G0008)
36%Service-mix similarity~41.8 milesView profile →

Terry N Brown, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Administration of influenza virus vaccine (G0008)
30%Service-mix similarity~41.8 milesView profile →

Kevin L Oltmanns, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • Administration of influenza virus vaccine (G0008)
29%Service-mix similarity~41.8 milesView profile →

Gilbert Edward Emde, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
29%Service-mix similarity~41.8 milesView profile →

Jon Mark Johnson, M.D.

Internal Medicine · Stillwater, OK

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
25%Service-mix similarity~41.8 milesView profile →

Yasir Usman, MD

Internal Medicine · Enid, OK

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
18%Service-mix similarity~48.0 milesView 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 approximate distance 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.