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Compare the published Medicare service mix of Charles Kevin Grigsby, M.D. with clinicians in the same registry specialty: General Surgery (CMS).

GRIFFIN, GA · 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 · 13 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Michael A Samotowka, MD

Critical Care (Intensivists) · General Surgery (CMS) · Atlanta, GA

Shared published services
3 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
100%Service-mix similarity~44.4 milesView profile →

Kristen Glasgow-Petela, MD

Critical Care (Intensivists) · General Surgery (CMS) · Atlanta, GA

Shared published services
3 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
75%Service-mix similarity~35.5 milesView profile →

Ashley Jana Marie Jones, M.D.

General Surgery (CMS) · Macon, GA

Shared published services
3 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
72%Service-mix similarity~48.6 milesView profile →

Dudley Benjamin Christie, MD

General Surgery (CMS) · Macon, GA

Shared published services
3 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Hospital discharge day management, 30 minutes or less (99238)
59%Service-mix similarity~48.6 milesView profile →

Kristin Elizabeth Harmon, DO

General Surgery (CMS) · Macon, GA

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)
47%Service-mix similarity~48.6 milesView profile →

Vanessa Arientyl, MD

General Surgery (CMS) · Atlanta, GA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
45%Service-mix similarity~35.5 milesView profile →

Dennis W Ashley, MD

General Surgery (CMS) · Macon, GA

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 similarity~48.6 milesView profile →

Jonathan Huy Nguyen, D.O.

Critical Care (Intensivists) · General Surgery (CMS) · Atlanta, GA

Shared published services
2 shared services · view billing descriptions
  • 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)
36%Service-mix similarity~35.5 milesView profile →

Deepika Koganti

General Surgery (CMS) · Atlanta, GA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
26%Service-mix similarity~35.5 milesView profile →

Amy Bourgeois Christie, MD

Critical Care (Intensivists) · General Surgery (CMS) · Macon, GA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
24%Service-mix similarity~48.6 milesView profile →

Marlieke E Nussenbaum, M.D.

Critical Care (Intensivists) · General Surgery (CMS) · Atlanta, GA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
23%Service-mix similarity~35.0 milesView profile →

Peter Walter Barrett, MD

Cardiovascular Disease (Cardiology) · Critical Care (Intensivists) (CMS) · Atlanta, GA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
17%Service-mix similarity~38.6 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.