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Compare the published Medicare service mix of Mary Katherine Gillingham, NP-C with clinicians in the same registry specialty: Family Nurse Practitioner.

SIMPSONVILLE, SC · Exact areaEdit location

2024 published service data · 38 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Kellie D Thompson, FNP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
93%Service-mix similarityView profile →

Donna K Johnson, RN, MSN, APRN, NP-C

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
79%Service-mix similarityView profile →

Keri Rexroad, NP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
79%Service-mix similarityView profile →

William Graham Robinson, FNP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
76%Service-mix similarityView profile →

Kristen Leigh Tallon, FNP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
73%Service-mix similarityView profile →

Monique Leekam Boyd, NP-C

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Automated urinalysis test (81003)
69%Service-mix similarityView profile →

Brian Scott Merritt

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 shared services · view billing descriptions
  • Automated urinalysis test (81003)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
57%Service-mix similarityView profile →

Melissa Ellis Dammann, ACNP, FNP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
53%Service-mix similarityView profile →

Lisa B Miller, PHD, FNP-BC

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 shared services · view billing descriptions
  • Automated urinalysis test (81003)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
51%Service-mix similarityView profile →

Doris A. Reid, APRN

Family Nurse Practitioner · Simpsonville, SC

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)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
49%Service-mix similarityView profile →

Julia S Paduano, NP

Family Nurse Practitioner · Simpsonville, SC

Shared published services
3 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)
  • Automated urinalysis test (81003)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
46%Service-mix similarityView profile →

Kristin Kay Jones, ARNP

Family Nurse Practitioner · Simpsonville, SC

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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Injection of drug or substance under skin or into muscle (96372)
45%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.