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FRANK CASTILLO JR. NP
NPI 1639623770
Nurse Practitioner in Walnut Creek, CA

Active since August 05, 2016PECOS EnrolledAccepts Medicare Assignment
100 N WIGET LN STE 290, WALNUT CREEK, CA 94598(925) 937-7740 Get Directions Write a Review

NPPES record last updated: September 22, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Frank Castillo Jr. Np NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

FRANK CASTILLO JR. NP (NPI 1639623770) is an individual nurse practitioner in Walnut Creek, California, licensed in California (95004634) and active in the NPI registry since August 2016. He is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1639623770
Entity TypeIndividualMale
Primary Taxonomy363L00000X
Provider Legal NameFRANK CASTILLO JR.Credential: NP
Location Address100 N WIGET LN STE 290Walnut Creek, CA 94598-5901
Mailing Address1450 Treat Blvd Ste 300Walnut Creek, CA 94597-2168 · (925) 952-2828
Phone(925) 937-7740
Sole ProprietorYes
Medical School CMSOtherGraduated 2016
Enumeration DateAugust 5, 2016
Last NPPES UpdateSeptember 22, 2025
NPPES CertifiedSeptember 22, 2025
✔ NPI 1639623770 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in CA · 95004634
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License 95004634 (CA)
100 N WIGET LN STE 290, Walnut Creek, CA 94598
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Frank Castillo Jr. Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7113201377
PECOS Enrollment IDI20170307001368
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

VIVIAN YU
Nurse Practitioner
100 N WIGET LN STE 290
WALNUT CREEK, CA 94598
Contra Costa County (925) 937-7740
ALEXIS SHIQI WANG MD
Urology
100 N WIGET LN STE 290
WALNUT CREEK, CA 94598
Contra Costa County (925) 937-7740
MR. ADAM FULLER NP
Nurse Practitioner
100 N WIGET LN STE 290
WALNUT CREEK, CA 94598
Contra Costa County (925) 937-7740

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Frank Castillo's NPI number?

The NPI number for Frank Castillo is 1639623770. It was assigned to this individual provider in the NPPES registry on August 5, 2016.

Where is Frank Castillo located?

Frank Castillo practices at 100 N Wiget Ln Ste 290, Walnut Creek, CA 94598. The listed phone number is (925) 937-7740.

What is Frank Castillo's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Frank Castillo enrolled in Medicare?

Yes. Frank Castillo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Frank Castillo was last updated on September 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.