PROMETHEUS MEDICAL GROUP PSC
NPI 1083183388
Internal Medicine - Hematology & Oncology in San Juan, PR

Q: What is Prometheus Medical Group Psc's NPI number?

The NPI number for Prometheus Medical Group Psc is 1083183388. It was assigned to this organization in the NPPES registry on November 15, 2018. The provider is doing business as Clinica de Oncologia Dr. Sixto Perez. The provider was formerly known as Prometheus Medical Group.

Q: What is Prometheus Medical Group Psc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Active since November 15, 2018

TORRE DEL METROPOLITANO 1789 CARR 21, SUITE 301, SAN JUAN, PR 00921(787) 463-9619 Get Directions Write a Review

NPPES record last updated: January 27, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 27, 2026, Nov 15, 2018 (2 updates tracked since 2018).

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About Prometheus Medical Group Psc NPPES

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

PROMETHEUS MEDICAL GROUP PSC (NPI 1083183388), doing business as Clinica De Oncologia Dr. Sixto Perez, is a healthcare organization registered as a hematology & oncology in San Juan, Puerto Rico and active in the NPI registry since November 2018. The organization lists Sixto Perez Garcia, Owner, as its authorized official.

NPPES Registry Identity

NPI1083183388

Entity TypeOrganization

Primary Taxonomy207RH0003X

Legal Business NamePROMETHEUS MEDICAL GROUP PSC

Location AddressTORRE DEL METROPOLITANO 1789 CARR 21, SUITE 301San Juan, PR 00921

Mailing Address1789 Carr 21 Ste 301San Juan, PR 00921-3337 · (787) 250-7338 · Fax (787) 705-7974

Phone(787) 463-9619

Organization SubpartNo

Authorized OfficialSixto Perez GarciaOwner · (787) 250-7338

Enumeration DateNovember 15, 2018

Last NPPES UpdateJanuary 27, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 27, 2026

✔ NPI 1083183388 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Other Names 2

Doing Business AsClinica De Oncologia Dr. Sixto Perez

Former Legal Business NamePrometheus Medical Group

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 and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Prometheus Medical Group Psc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Prometheus Medical Group Psc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Sixto Perez Garcia, MD

Hematology/Oncology

NPI 1649240110

1789 CARR 21 STE 301
San Juan, PR 00921

(787) 250-7338

✔ PECOS✔ Accepts Medicare

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

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 Prometheus Medical Group Psc's NPI number?

The NPI number for Prometheus Medical Group Psc is 1083183388. It was assigned to this organization in the NPPES registry on November 15, 2018. The provider is doing business as Clinica de Oncologia Dr. Sixto Perez. The provider was formerly known as Prometheus Medical Group.

Where is Prometheus Medical Group Psc located?

Prometheus Medical Group Psc is located at Torre Del Metropolitano 1789 Carr 21 Suite 301, San Juan, PR 00921. The listed phone number is (787) 463-9619.

What is Prometheus Medical Group Psc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Prometheus Medical Group Psc enrolled in Medicare?

Yes. Prometheus Medical Group Psc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Prometheus Medical Group Psc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hematology/Oncology) reassigns their Medicare billing to Prometheus Medical Group Psc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Prometheus Medical Group Psc was last updated on January 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.