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Compare the published Medicare service mix of Spencer John Mares, FNP-C, AGACNP-BC with clinicians in the same registry specialty: Nurse Practitioner (CMS).

MO · Exact areaEdit location

2024 published service data · 221 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Akiko Okabe, AGACNP

Nurse Practitioner (CMS) · Lake St Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Advance care planning, first 30 minutes (99497)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
87%Service-mix similarityView profile →

Stephanie Nicole Piotter, ANP

Nurse Practitioner (CMS) · Bridgeton, 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
72%Service-mix similarityView profile →

Hasan Saleh El-Fahmawi, ACNP

Nurse Practitioner (CMS) · Chesterfield, 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
72%Service-mix similarityView profile →

Katheryne Tifuh Amba, NP

Nurse Practitioner (CMS) · Saint Louis, 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
72%Service-mix similarityView profile →

Rachel Catherine Selby, AGACNP-BC

Nurse Practitioner (CMS) · Kirksville, 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)
61%Service-mix similarityView profile →

John Todd Linard

Nurse Practitioner (CMS) · Kansas City, 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)
61%Service-mix similarityView profile →

William Mark Sherrill, APRN

Nurse Practitioner (CMS) · Kansas City, 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)
61%Service-mix similarityView profile →

Carrie Renee Meek, ACNPC-AG

Specialty details in registry · Grain Valley, 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)
  • Advance care planning, first 30 minutes (99497)
52%Service-mix similarityView profile →

Eric N Howard, NP

Nurse Practitioner (CMS) · Saint Louis, 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)
  • Advance care planning, first 30 minutes (99497)
50%Service-mix similarityView profile →

Jazmine D Hill, ACNP

Nurse Practitioner (CMS) · Kansas City, MO

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
48%Service-mix similarityView profile →

Dawn Alexandria Held, ACNP

Nurse Practitioner (CMS) · Saint Louis, MO

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
48%Service-mix similarityView profile →

Stephanie Marie Dribben, ACNP

Nurse Practitioner (CMS) · Saint Louis, MO

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
48%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.