Brenda Castolo, AGACNP-BC
NPI 1083195408 · Nurse Practitioner · Palo Alto, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brenda Castolo, AGACNP-BC is a Nurse Practitioner provider in Palo Alto, CA (NPI 1083195408).
Provider details
- NPI number
- 1083195408
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AGACNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 95009709 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
61 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 29 | $111 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 20 | $79 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 12 | $65 |
Typical Medicare-allowed amounts for these services range $65–$111 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 2000 Mowry AveFremont, CA 94538-1716Phone: (510) 313-8354
Registry dates
- Enumerated
- 2018-08-23
- Last updated
- 2019-01-09
Frequently asked questions
- What is Brenda Castolo's NPI number?
- Brenda Castolo's National Provider Identifier (NPI) is 1083195408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brenda Castolo's specialty?
- Brenda Castolo is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Brenda Castolo located?
- Brenda Castolo's practice location on file with NPPES is 900 Welch Rd Ste 350, Palo Alto, CA 94304-1807.
- What is Brenda Castolo's phone number?
- The practice phone number listed in the NPPES registry for Brenda Castolo is (650) 723-6576.
- Does Brenda Castolo accept Medicare?
- Brenda Castolo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brenda Castolo's NPI active?
- Yes — Brenda Castolo's NPI (1083195408) is active in the NPPES registry as of the last update on 2019-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.