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DR. OSCAR ANDRES GUILLAMA MD
NPI 1003378977
Radiology - Diagnostic Radiology in Houston, TX

Active since April 01, 2019PECOS Enrolled
1400 PRESSLER ST, HOUSTON, TX 77030(713) 792-6182 Get Directions Write a Review

NPPES record last updated: April 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 28, 2026, Jul 25, 2021, Nov 9, 2020 and 2 more (5 updates tracked since 2019).

About Dr. Oscar Andres Guillama Md NPPES

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

DR. OSCAR ANDRES GUILLAMA MD (NPI 1003378977) is an individual diagnostic radiology provider in Houston, Texas, licensed in Texas (BP10073826) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of San Juan Bautista School Of Medicine (2020).

NPPES Registry Identity

NPI1003378977
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDR. OSCAR ANDRES GUILLAMACredential: MD
Location Address1400 PRESSLER STHouston, TX 77030-3722
Mailing AddressHc 3 Box 11102Camuy, PR 00627-9650 · (787) 800-7661
Phone(713) 792-6182
Sole ProprietorYes
Medical School CMSSan Juan Bautista School Of MedicineGraduated 2020
Enumeration DateApril 1, 2019
Last NPPES UpdateApril 28, 20265 updates tracked since enumeration
NPPES CertifiedApril 28, 2026
✔ NPI 1003378977 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in TX · BP10073826
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedGeneral PracticeTaxonomy 208D00000X · License 34923R (PR)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1400 PRESSLER ST, Houston, TX 77030
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1San Juan City Hospital, Bo. Monacillos, Centro Medico de PRRio Piedras, PR 00917 · Phone (787) 480-2791
Location 2Autopista Luis A Ferre Salida 21 Carr 12, Urb Turabo GardensCaguas, PR 00726 · Phone (787) 743-3038 ext. 276
Location 31 Baylor PlzHouston, TX 77030-3498 · Phone (713) 798-4951

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Oscar Andres Guillama Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8022592195
PECOS Enrollment IDI20260318000148
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 Oscar Guillama reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Shelin Agrawal And Hyer PLLC
1,238 mi
Diagnostic Radiology
657 N TOWN CENTER DR
Las Vegas, NV 89144
  • Reassigned Medicare billing, Texas enrollment
  • 31 clinicians in this Medicare group
NPI 1861783961 (752) 210-5954

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 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
$90.40 typical visit price
range $58.24 – $176.98
Typical copayment $22.60 (range $14.56 – $44.24)
Most-billed visit code 99203
Established Patient
$72.62 typical visit price
range $18.60 – $143.93
Typical copayment $18.15 (range $4.65 – $35.98)
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 20

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

DR. DAVID JOSEPH VINING M.D.
Radiology (Body Imaging)
1400 PRESSLER ST, FCT 15.6038
HOUSTON, TX 77030
Harris County (713) 792-3437
DAVID KRIJGH MD
Plastic Surgery
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 794-5493
DR. YOUSSEF AMR OSAMA AZAB MD
Student in an Organized Health Care Education/Training Program
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 792-6182
ORIOL MIRALLAS VINAS
Student in an Organized Health Care Education/Training Program
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 792-2696
MOURIN HAFEEZ
Student in an Organized Health Care Education/Training Program
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 818-3339
DR. FRANCESCO COBELLIS MD
Student in an Organized Health Care Education/Training Program
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 745-9200
DR. PHILIP THOMPSON MBBS
Internal Medicine (Hematology & Oncology)
1400 PRESSLER ST, FC.4.3000, DEPT. LEUKEMIA, MD ANDERSON CANCER CENTER
HOUSTON, TX 77030
Harris County (713) 792-7430
GUILLERMINA VERDUSCO MSN, RN, FNP-C
Nurse Practitioner (Family)
1400 PRESSLER ST
HOUSTON, TX 77030
Harris County (713) 563-1741

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 Oscar Guillama's NPI number?

The NPI number for Oscar Guillama is 1003378977. It was assigned to this individual provider in the NPPES registry on April 1, 2019.

Where is Oscar Guillama located?

Oscar Guillama practices at 1400 Pressler St, Houston, TX 77030. The listed phone number is (713) 792-6182.

What is Oscar Guillama's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Oscar Guillama enrolled in Medicare?

Yes. Oscar Guillama is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Oscar Guillama's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Oscar Guillama reassigns Medicare benefits to Shelin Agrawal And Hyer PLLC (Las Vegas, NV). 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 Oscar Guillama's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Oscar Guillama was last updated on April 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.