OSCAR A. GUILLAMA MD – NPI #1003378977
Radiology

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

OSCAR GUILLAMA is a radiologist located in HOUSTON, TX. NPPES has assigned the NPI number 1003378977 to OSCAR GUILLAMA on April 01, 2019. It is a Type-1 NPI, indicating this NPI number is associated with an individual. According to the NPI data, there are 3 additional location(s) assigned to this provider which are listed below. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2085R0202X from the Health Care Provider Taxonomy code set, which is classified as Radiology, specializing in Diagnostic Radiology

The NPI profile was last updated on Apr 28, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for OSCAR GUILLAMA below.

NPI Profile for
OSCAR A. GUILLAMA

NPI Number
1003378977
Enumeration Date

(more than 7 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
OSCAR A. GUILLAMA
Credentials
MD
Primary location
1400 PRESSLER ST
HOUSTON, TX 77030-3722
Phone: (713) 792-6182 Fax:
3 Other location(s):
Autopista Luis A Ferre Salida 21 Carr 12
Urb Turabo Gardens
Caguas, PR 00726
Phone: (787) 743-3038 Ext: 276
San Juan City Hospital
Bo. Monacillos, Centro Medico de PR
Rio Piedras, PR 00917
Phone: (787) 480-2791
1 Baylor Plz
Houston, TX 77030-3498
Phone: (713) 798-4951
Mailing address
HC 3 BOX 11102
CAMUY, PR 00627-9650
Phone: (787) 800-7661 Fax:
Sole Proprietor
Yes
Updated
Certification Date
Apr 28, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for OSCAR GUILLAMA

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
OTHERTEXAS MEDICAL BOARDTXBP10073826
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
2085R0202X
- Radiology / Diagnostic Radiology (Primary)
TX BP10073826
390200000X
- Student in an Organized Health Care Education/Training Program
208D00000X
- General Practice
PR 34923R

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Education
SAN JUAN BAUTISTA SCHOOL OF MEDICINE - Graduated 2020
Accepts Medicare
This provider may accept Medicare Assignment. The Medicare-approved amount is the total the doctor or supplier can be paid. When a doctor accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsurance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
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Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.