DR. BRIAN S CASTILLO M.D.
NPI 1528224151
Pathology - Anatomic Pathology & Clinical Pathology in Houston, TX

Q: What is Brian Castillo's NPI number?

The NPI number for Brian Castillo is 1528224151. It was assigned to this individual provider in the NPPES registry on August 4, 2008.

Q: What is Brian Castillo's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Brian Castillo was last updated on August 3, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.

Active since August 04, 2008PECOS EnrolledAccepts Medicare Assignment

95.47/100

CMS Quality Rating

6431 FANNIN ST, HOUSTON, TX 77030(713) 500-5301 Get Directions Write a Review

NPPES record last updated: August 3, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Dr. Brian S Castillo M.d. NPPES

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

DR. BRIAN S CASTILLO M.D. (NPI 1528224151) is an individual anatomic pathology & clinical pathology provider in Houston, Texas, licensed in Texas (Q4375) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS, is affiliated with Houston Methodist Hospital, and is a graduate of University Of Texas Medical School At Houston (2008).

NPPES Registry Identity

NPI1528224151

Entity TypeIndividualMale

Primary Taxonomy207ZP0102X

Provider Legal NameDR. BRIAN S CASTILLOCredential: M.D.

Location Address6431 FANNIN STHouston, TX 77030-1501

Mailing Address6431 Fannin StHouston, TX 77030-1501 · (713) 500-5301

Phone(713) 500-5301

Sole ProprietorNo

Medical School CMSUniversity Of Texas Medical School At HoustonGraduated 2008

Enumeration DateAugust 4, 2008

Last NPPES UpdateAugust 3, 2015

✔ NPI 1528224151 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

License✔ Licensed in TX · Q4375

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

6431 FANNIN ST, Houston, TX 77030

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include 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 and accepts Medicare assignment

Dr. Brian S Castillo M.d. 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 ID4082928403

PECOS Enrollment IDI20150729009589

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

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

University Of Texas Health Science Center At Houston

Same address

Clinical Pathology/Laboratory Medicine

6431 FANNIN STREET, MSB 2.136
Houston, TX 77030

Reassigned Medicare billing, Texas enrollment
73 clinicians in this Medicare group

NPI 1831142751 (713) 500-5301

Methodist Pathology Associates PLLC

0.3 mi

Anatomic Pathology & Clinical Pathology

6565 FANNIN STREET, MS205
Houston, TX 77030

Reassigned Medicare billing, Texas enrollment
87 clinicians in this Medicare group

NPI 1215995584 (346) 238-5867

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Protein measurement, serum 84165

A serum protein measurement is a blood test that determines the levels of proteins in your blood. It is used to evaluate your overall health, and diagnose nutritional problems, kidney disease, liver disease, or immune disorders.

702 services595 patients

Mechanical separation of plasma from blood 36514

Mechanical separation of plasma from blood is a procedure where your blood is drawn and placed in a machine. This machine spins the blood at high speeds, separating the plasma (a yellowish fluid) from the rest of the blood components. The plasma is then collected for medical purposes.

177 services59 patients

Protein measurement, body fluid 84166

A protein measurement of body fluid is a test that gauges the amount of proteins in your fluids. This analysis helps in detecting various health conditions. It's done via a simple sample collection process, usually from blood or urine, in a safe and painless manner.

157 services148 patients

Immunologic analysis technique on body fluid, other fluids with concentration 86335

Immunologic analysis is a diagnostic method that assesses your body fluids to detect health issues. It involves concentrating these fluids to enhance detection of specific proteins or cells. It helps identify immune system responses, aiding in accurate diagnosis and treatment.

63 services58 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Houston Methodist Hospital

Acute Care Hospitals · Houston, TX

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450358

Location6565 FanninHouston, TX 77030 · Harris County

Emergency services Birthing friendly

Houston Methodist Baytown Hospital

Acute Care Hospitals · Baytown, TX

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450424

Location4401 Garth RoadBaytown, TX 77521 · Harris County

Emergency services Birthing friendly

Houston Methodist Clear Lake Hospital

Acute Care Hospitals · Nassau Bay, TX

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450709

Location18300 Houston Methodist DrNassau Bay, TX 77058 · Harris County

Emergency services Birthing friendly

Houston Methodist Sugarland Hospital

Acute Care Hospitals · Sugar Land, TX

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450820

Location16655 Southwest FreewaySugar Land, TX 77479 · Fort Bend County

Emergency services Birthing friendly

Houston Methodist The Woodlands Hospital

Acute Care Hospitals · The Woodlands, TX

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number670122

Location17201 Interstate 45 SouthThe Woodlands, TX 77385 · Montgomery County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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

$134.06 typical visit price

range $58.24 – $176.98

Typical copayment $33.51 (range $14.56 – $44.24)

Most-billed visit code 99204

Established Patient

$102.71 typical visit price

range $18.60 – $143.93

Typical copayment $25.67 (range $4.65 – $35.98)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.47/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

97.15

Improvement Activities

Cost

83.57

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.

DR. STUART MASON FRASER M.D.

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

6431 FANNIN ST, MSB 3.151
HOUSTON, TX 77030

Harris County (713) 500-5800

AMY ROSSI MD

Emergency Medicine

6431 FANNIN ST, JJL 431
HOUSTON, TX 77030

Harris County (713) 500-7882

MATTHEW KHOA NGUYEN

Student in an Organized Health Care Education/Training Program

6431 FANNIN ST
HOUSTON, TX 77030

Harris County (713) 500-6113

MARY WAYNE PELTIER MD

Student in an Organized Health Care Education/Training Program

6431 FANNIN ST
HOUSTON, TX 77030

Harris County (713) 500-5010

HANNA MAVRIC DO

Student in an Organized Health Care Education/Training Program

6431 FANNIN ST
HOUSTON, TX 77030

Harris County (713) 500-7882

DR. DAVIDE CATTANO MD

Anesthesiology

6431 FANNIN ST, MSB 5.020
HOUSTON, TX 77030

Harris County (713) 500-6235

MICHAEL ANTHONY HOLZMAN

Orthopaedic Surgery

6431 FANNIN ST, SUITE JJL 310
HOUSTON, TX 77030

Harris County (713) 500-5154

SHUBHANGI MEHRA

Student in an Organized Health Care Education/Training Program

6431 FANNIN ST
HOUSTON, TX 77030

Harris County (713) 500-0798

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 Brian Castillo's NPI number?

The NPI number for Brian Castillo is 1528224151. It was assigned to this individual provider in the NPPES registry on August 4, 2008.

Where is Brian Castillo located?

Brian Castillo practices at 6431 Fannin St, Houston, TX 77030. The listed phone number is (713) 500-5301.

What is Brian Castillo's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Brian Castillo enrolled in Medicare?

Yes. Brian 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.

Which organizations bill Medicare for Brian Castillo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Brian Castillo reassigns Medicare benefits to 2 organizations: University Of Texas Health Science Center At Houston (Houston, TX) and Methodist Pathology Associates PLLC (Houston, 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 Brian Castillo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Brian Castillo accept?

Health plans from Blue Cross and Blue Shield of Texas list Brian Castillo 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.

Is Brian Castillo affiliated with any hospitals?

According to CMS data, Brian Castillo is affiliated with Houston Methodist Hospital, Houston Methodist Baytown Hospital, Houston Methodist Clear Lake Hospital, Houston Methodist Sugarland Hospital and Houston Methodist The Woodlands Hospital.

When was this NPI record last updated?

The NPPES record for Brian Castillo was last updated on August 3, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.