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WASHINGTON ANDRES MARIN CASTRO M.D.
NPI 1396368544
Pediatrics in Brenham, TX

Active since May 22, 2020PECOS Enrolled
600 N PARK ST, BRENHAM, TX 77833(979) 337-5816(979) 337-5810 Get Directions Write a Review

NPPES record last updated: January 30, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 12, 2023, Dec 22, 2022, May 22, 2020 (3 updates tracked since 2020).

About Washington Andres Marin Castro M.d. NPPES

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

WASHINGTON ANDRES MARIN CASTRO M.D. (NPI 1396368544) is an individual pediatrics provider in Brenham, Texas, licensed in Texas (U1081) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS and maintains a secondary practice location in Brenham.

NPPES Registry Identity

NPI1396368544
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameWASHINGTON ANDRES MARIN CASTROCredential: M.D.
Location Address600 N PARK STBrenham, TX 77833
Mailing AddressPo Box 844658Dallas, TX 75284-4658 · (800) 994-0371
Phone(979) 337-5816
Fax(979) 337-5810
Sole ProprietorNo
Enumeration DateMay 22, 2020
Last NPPES UpdateJanuary 30, 20243 updates tracked since enumeration
NPPES CertifiedJanuary 30, 2024
✔ NPI 1396368544 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in TX · U1081
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
600 N PARK ST, Brenham, TX 77833
Open in Google Maps ↗

Secondary Practice Location 1

Location 1700 Medical PkwyBrenham, TX 77833-5413 · Phone (979) 337-5000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Washington Andres Marin Castro M.d. 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 Reassignments

2

Medicare enrollment records show Washington Marin Castro reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Scott & White Hospital Brenham
1.8 mi
Internal Medicine
700 MEDICAL PKWY
Brenham, TX 77833
  • Reassigned Medicare billing, Texas enrollment
  • Also billed through NPI 1154315307 (Texas)
  • 103 clinicians in this Medicare group
NPI 1295464949 (979) 337-5000
Scott & White Clinic
33 mi
Internal Medicine
1700 UNIVERSITY DR E
College Station, TX 77840
  • Reassigned Medicare billing, Texas enrollment
  • 2,795 clinicians in this Medicare group
NPI 1922061993 (979) 691-3300

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 77833 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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 20

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

AURBREY HANATH EIKENHORST FNP
Nurse Practitioner (Family)
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
KATHERINE ELIZABETH ALFORD PA-C
Physician Assistant
600 N PARK ST, BRENHAM CLINIC
BRENHAM, TX 77833
Washington County (979) 830-0508
MR. MARK DWAYNE ASMUSSEN P.A.
Physician Assistant
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
DR. CAITLIN MORGAN CONNER MD
Family Medicine
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
DR. CASSANDRA M BRYANT MD
Pediatrics
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153
JESSICA LYNN GEMINA MOHR PA-C
Physician Assistant
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
WILLIAM KLINGSPORN
Surgery
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 337-5800
DR. WILLIAM ROBERT LOESCH M.D.
Internal Medicine
600 N PARK ST
BRENHAM, TX 77833
Washington County (979) 836-6153

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 Washington Marin Castro's NPI number?

The NPI number for Washington Marin Castro is 1396368544. It was assigned to this individual provider in the NPPES registry on May 22, 2020.

Where is Washington Marin Castro located?

Washington Marin Castro practices at 600 N Park St, Brenham, TX 77833. The listed phone number is (979) 337-5816.

What is Washington Marin Castro's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Washington Marin Castro enrolled in Medicare?

Yes. Washington Marin Castro is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Washington Marin Castro's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Washington Marin Castro reassigns Medicare benefits to 2 organizations: Scott & White Hospital Brenham (Brenham, TX) and Scott & White Clinic (College Station, TX). Each 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 Washington Marin Castro's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Washington Marin Castro accept?

Health plans from Baylor Scott and White Health Plan and Blue Cross and Blue Shield of Texas list Washington Marin 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 Washington Marin Castro was last updated on January 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.