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Compare the published Medicare service mix of Brenda Irene Castolo, AGACNP-BC with clinicians in the same registry specialty: Nurse Practitioner.

PALO ALTO, CA · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 350 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Renatta Arianne Lolong

Nurse Practitioner · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
  • Hospital discharge day management, 30 minutes or less (99238)
87%Service-mix similarity~1.4 milesView profile →

Ijeoma Nwadiogo Okonkwo Pope, NP

Nurse Practitioner · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
  • Hospital discharge day management, 30 minutes or less (99238)
87%Service-mix similarity~1.4 milesView profile →

Jeanne Alison Hoffman, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, 30 minutes or less (99238)
58%Service-mix similarity~1.4 milesView profile →

Ian David Montgomery, NP

Nurse Practitioner · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
  • Hospital discharge day management, 30 minutes or less (99238)
56%Service-mix similarity~1.4 milesView profile →

Hannah Reusch Spero, MSN, APRN, NP-C

Nurse Practitioner · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
  • Emergency department visit with low level of medical decision making (99283)
52%Service-mix similarity~1.4 milesView profile →

Grace Erin Oppenheim, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
49%Service-mix similarity~1.4 milesView profile →

Ronald Higinio M Hebron, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, 30 minutes or less (99238)
41%Service-mix similarity~1.4 milesView profile →

Brenda Irene Aceves, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
29%Service-mix similarity~1.4 milesView profile →

Martinien Cho

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
25%Service-mix similarity~1.4 milesView profile →

Madelaine Ryan, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, 30 minutes or less (99238)
17%Service-mix similarity~1.4 milesView profile →

Deborah Dongju Lee, NP

Nurse Practitioner · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hospital discharge day management, more than 30 minutes (99239)
16%Service-mix similarity~1.4 milesView 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 approximate distance 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.