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Compare the published Medicare service mix of Charles Thomas Alexander Semelka, MD with clinicians in the same registry specialty: Geriatric Medicine (CMS).

WINSTON SALEM, NC · Exact areaEdit location

2024 published service data · 18 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Victoria Rose Shada, MD

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
74%Service-mix similarityView profile →

Evelyn Chang Kwok, M.D.

Geriatric Medicine · Internal Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)
70%Service-mix similarityView profile →

Cynthia Lorena Aguirre Valdivieso, M.D.

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
61%Service-mix similarityView profile →

Laura Elizabeth Moore, DO

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
54%Service-mix similarityView profile →

Kathryn E. Callahan, M.D.

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
50%Service-mix similarityView profile →

Holly J Coward, M.D.

Geriatric Medicine · Internal Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
47%Service-mix similarityView profile →

Lauren Elizabeth-Kraics Mckay, DO

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
45%Service-mix similarityView profile →

Jennifer Lynn Gabbard, M.D.

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
2 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
43%Service-mix similarityView profile →

Jamehl Demons Shegog, MD

Geriatric Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)
  • Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
33%Service-mix similarityView profile →

Carl R Grey, MD

Geriatric Medicine (CMS) · Winston Salem, NC

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)
26%Service-mix similarityView profile →

Julie Anne Williams, MD

Internal Medicine (CMS) · Winston Salem, NC

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)
19%Service-mix similarityView profile →

Ezequiel Zamora, MD

Geriatric Medicine (CMS) · Winston Salem, NC

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 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.