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Compare the published Medicare service mix of Sherry O'brien, NURSE PRACTITIONER with clinicians in the same registry specialty: Family Nurse Practitioner.

FLAGSTAFF, AZ · Exact areaEdit location

2024 published service data · 32 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Matthew Gilkey, FNP

Family Nurse Practitioner · Flagstaff, AZ

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
66%Service-mix similarityView profile →

Melissa Hakes, FNP

Family Nurse Practitioner · Flagstaff, AZ

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
63%Service-mix similarityView profile →

Julie Marie Polzin, RN, NP-C

Family Nurse Practitioner · Flagstaff, AZ

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 high level of medical decision making, if using time, 40 minutes or more (99215)
58%Service-mix similarityView profile →

Megan Engbring, DNP, FNP-C

Family Nurse Practitioner · Flagstaff, AZ

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
56%Service-mix similarityView profile →

Caryn Jene Epperson, AG-ACNP

Family Nurse Practitioner · Flagstaff, AZ

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)
55%Service-mix similarityView profile →

Claire Veltkamp

Family Nurse Practitioner · Flagstaff, AZ

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
47%Service-mix similarityView profile →

Joseph Robert Lach, NP

Family Nurse Practitioner · Flagstaff, AZ

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)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
46%Service-mix similarityView profile →

Karen Vanaman, APRN, FNP-C

Family Nurse Practitioner · Flagstaff, AZ

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)
45%Service-mix similarityView profile →

Laurel Taylor Combs, FNP

Family Nurse Practitioner · Flagstaff, AZ

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 similarityView profile →

Michael Dale Hilburn, FNP-C

Family Nurse Practitioner · Flagstaff, AZ

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 high level of medical decision making, if using time, 40 minutes or more (99215)
41%Service-mix similarityView profile →

Brett Brawley

Family Nurse Practitioner · Flagstaff, AZ

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
40%Service-mix similarityView profile →

Christopher Luis Gomez, APRN

Family Nurse Practitioner · Flagstaff, AZ

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
37%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.