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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GUILLERMO CHRISTIAN CASTRO DMD
NPI 1679259642
Dentist - Pediatric Dentistry in Waianae, HI

Active since June 26, 2023PECOS Enrolled
86-260 FARRINGTON HIGHWAY, WAIANAE, HI 96792(808) 697-3300(808) 697-3687 Get Directions Write a Review

NPPES record last updated: October 6, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Guillermo Christian Castro Dmd NPPES

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

DR. GUILLERMO CHRISTIAN CASTRO DMD (NPI 1679259642) is an individual pediatric dentistry provider in Waianae, Hawaii, licensed in Georgia (DN123780) and active in the NPI registry since June 2023. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1679259642
Entity TypeIndividualMale
Primary Taxonomy1223P0221X
Provider Legal NameDR. GUILLERMO CHRISTIAN CASTROCredential: DMD
Location Address86-260 FARRINGTON HIGHWAYWaianae, HI 96792-0241
Mailing Address86-260 Farrington HighwayWaianae, HI 96792 · (808) 697-3300 · Fax (808) 697-3687
Phone(808) 697-3300
Fax(808) 697-3687
Sole ProprietorYes
Enumeration DateJune 26, 2023
Last NPPES UpdateOctober 6, 2026
NPPES CertifiedOctober 6, 2026
✔ NPI 1679259642 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Pediatric DentistryDental Providers
Taxonomy Code1223P0221X
License✔ Licensed in GA · DN123780
Definition
An age-defined specialty that provides both primary and comprehensive preventive and therapeutic oral health care for infants and children through adolescence, including those with special health care needs.
86-260 FARRINGTON HIGHWAY, Waianae, HI 96792
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1135 Cedar StRichmond Hill, GA 31324-3745 · Phone (912) 715-7873
Location 285-175 Ferrington Highway A334Waianae, HI 96792 · Phone (912) 844-2200

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Guillermo Christian Castro Dmd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Guillermo Castro reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Waianae District Comprehensive Health And Hospital Board, Inc
Same address
Family Medicine
86-260 FARRINGTON HWY
Waianae, HI 96792
  • Reassigned Medicare billing, Hawaii enrollment
  • Medicare enrollment name: Waianae District Comprehensive Health And Hospital Board Incorporated
  • 240 clinicians in this Medicare group
NPI 1275566424 (808) 697-3300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96792 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
$92.50 typical visit price
range $60.53 – $180.05
Typical copayment $23.12 (range $15.13 – $45.01)
Most-billed visit code 99203
Established Patient
$74.92 typical visit price
range $20.09 – $147.56
Typical copayment $18.73 (range $5.02 – $36.89)
Most-billed visit code 99213
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 5

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

CAYCE KELIIKAI WAIPA RDH
Dental Hygienist
86-260 FARRINGTON HIGHWAY, MAIN HEALTH CENTER
WAIANAE, HI 96792
Honolulu County (808) 697-3496
EMILIE YOUNG RD
Dietitian, Registered
86-260 FARRINGTON HIGHWAY, WCCHC
WAIANAE, HI 96792
Honolulu County (808) 696-1526
MR. DEREK CLARK REEVES JR. P.A.
Physician Assistant
86-260 FARRINGTON HIGHWAY, WAIANAE COAST COMPREHENSIVE HEALTH CENTER ED
WAIANAE, HI 96792
Honolulu County (808) 697-3499
DR. SERENA YU DMD
Dentist
86-260 FARRINGTON HIGHWAY
WAIANAE, HI 96792
Honolulu County (401) 699-3992
MRS. STEFANIE K. Y. CHANG-HIU RD, MPH
Dietitian, Registered
86-260 FARRINGTON HIGHWAY
WAIANAE, HI 96792
Honolulu County (808) 696-7081

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 Guillermo Castro's NPI number?

The NPI number for Guillermo Castro is 1679259642. It was assigned to this individual provider in the NPPES registry on June 26, 2023.

Where is Guillermo Castro located?

Guillermo Castro practices at 86-260 Farrington Highway, Waianae, HI 96792. The listed phone number is (808) 697-3300.

What is Guillermo Castro's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Pediatric Dentistry, with taxonomy code 1223P0221X.

Is Guillermo Castro enrolled in Medicare?

Yes. Guillermo Castro is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Guillermo Castro's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Castro reassigns Medicare benefits to Waianae District Comprehensive Health And Hospital Board, Inc (Waianae, HI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Guillermo Castro's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Guillermo Castro accept?

Health plans from BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Dominion National and 12 other insurers list Guillermo Castro as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Guillermo Castro was last updated on October 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.