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Compare the published Medicare service mix of William Spencer Grigg, D.O. with clinicians in the same registry specialty: Internal Medicine (CMS).

MOUNTAIN HOME, AR · 100 milesEdit location
Within 100 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 · 10 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Brittany Nicole Kramer, PA-C

Physician Assistant (CMS) · Springfield, MO

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
42%Service-mix similarity~77.2 milesView profile →

Indrajeet Mahata, M.D

Cardiac Electrophysiology (CMS) · Springfield, MO

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
31%Service-mix similarity~75.1 milesView profile →

Jian Liang Tan, MD

Internal Medicine (CMS) · Springfield, MO

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
29%Service-mix similarity~75.1 milesView profile →

Andrew Aboyme, MD

Cardiac Electrophysiology (CMS) · Rogers, AR

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
28%Service-mix similarity~98.8 milesView profile →

Shang-Chiun Lee, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Springfield, MO

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
27%Service-mix similarity~75.1 milesView profile →

Kamal Preet Cheema, MD

Cardiac Electrophysiology (CMS) · Springfield, MO

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
22%Service-mix similarity~77.2 milesView profile →

Sunthosh Parvathaneni, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Springfield, MO

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
21%Service-mix similarity~75.1 milesView profile →

Scott W Ferreira, M.D.

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Springfield, MO

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
17%Service-mix similarity~77.2 milesView profile →

John Brian Garner, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Springfield, MO

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
14%Service-mix similarity~77.2 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.