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Compare the published Medicare service mix of Sarah Christian Walter, NP with clinicians in the same registry specialty: Specialty details in registry.

TUCSON, AZ · Exact areaEdit location

2024 published service data · 61 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Daniella Kinyua, NURSE PRACTITIONER

Nurse Practitioner (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Dialysis services, 4 or more physician visits per month (20 years or older) (90960)
  • Dialysis services, 2-3 physician visits per month (20 years or older) (90961)
58%Service-mix similarityView profile →

Barbara Alva Mayer, NP

Nurse Practitioner (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
35%Service-mix similarityView profile →

Rachel Harasha, DNP, NP

Nurse Practitioner (CMS) · Tucson, 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)
21%Service-mix similarityView profile →

Nicole A Ciffone, NP

Nurse Practitioner (CMS) · Tucson, 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)
19%Service-mix similarityView profile →

Jennifer Anna Martinez, MSN, AGACNP-BC

Nurse Practitioner (CMS) · Tucson, 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)
19%Service-mix similarityView profile →

Joan Louise Machamer, AGACNP-BC

Nurse Practitioner (CMS) · Tucson, 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)
17%Service-mix similarityView profile →

April Weaver, ACNP

Nurse Practitioner (CMS) · Tucson, 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)
17%Service-mix similarityView profile →

Aaron Golden Winter, NP

Nurse Practitioner (CMS) · Tucson, 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)
17%Service-mix similarityView profile →

Jennifer Lynn Ward, DNP

Nurse Practitioner (CMS) · Tucson, 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)
17%Service-mix similarityView profile →

Kristy Lynn Keating, ANCP-C

Nurse Practitioner (CMS) · Tucson, 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)
15%Service-mix similarityView profile →

Debra Lynn Jackley, AGACNP

Nurse Practitioner (CMS) · Tucson, 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)
14%Service-mix similarityView profile →

Jaimi Walrath, MSN, AGACNP-BC

Nurse Practitioner (CMS) · Tucson, 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)
14%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.