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EFRAIN M FLORES DE HOSTOS MD
NPI 1083710164
Internal Medicine - Nephrology in Mayaguez, PR

Active since September 15, 2006PECOS Enrolled
1050 LOS CORAZONES AVE, SUITE 102, MAYAGUEZ, PR 00680(787) 834-5334(787) 833-6640 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Efrain M Flores De Hostos Md NPPES

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

EFRAIN M FLORES DE HOSTOS MD (NPI 1083710164) is an individual nephrology provider in Mayaguez, Puerto Rico, licensed in Puerto Rico (6559) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1083710164
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameEFRAIN M FLORES DE HOSTOSCredential: MD
Location Address1050 LOS CORAZONES AVE, SUITE 102Mayaguez, PR 00680-7042
Mailing Address1050 Los Corazones Ave, Suite 102Mayaguez, PR 00680-7042 · (787) 834-5334 · Fax (787) 833-6640
Phone(787) 834-5334
Fax(787) 833-6640
Sole ProprietorNo
Enumeration DateSeptember 15, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1083710164 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in PR · 6559
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1050 LOS CORAZONES AVE, Mayaguez, PR 00680
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Other Identifiers 7

Medicare ID-Type Unspecified0022332BPR
Medicare ID-Type Unspecified0084993DPR
Medicare ID-Type Unspecified0084924CPR
Medicare ID-Type Unspecified0084991BPR
Medicare UPIND26725
Medicare ID-Type Unspecified0024175CPR
Medicare ID-Type Unspecified0084992BPR

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Efrain M Flores De Hostos Md 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 Reassignment

Medicare enrollment records show Efrain Flores De Hostos reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nefrologos Asociados Del Oeste
Nephrology
1050 LOS CORAZONES AVE, SUITE 102
Mayaguez, PR 00680
  • Reassigned Medicare billing, Puerto Rico enrollment
  • 9 clinicians in this Medicare group
NPI 1861596496 (787) 834-5934

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 00680 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
$130.65 typical visit price
range $56.86 – $172.44
Typical copayment $32.66 (range $14.21 – $43.11)
Most-billed visit code 99204
Established Patient
$100.24 typical visit price
range $18.24 – $140.44
Typical copayment $25.06 (range $4.56 – $35.11)
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 7

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

GERARDO J MEDINA CABAN MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, SUITE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334
FRANCISCO J REYES VALE MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, SUITE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334
ROBERTO LEBRON RIVERA MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, STE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334
ENRIQUE LEFEVRE MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, SUITE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334
JORGE L WEBER ACEVEDO MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, STE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334
NEFROLOGOS ASOCIADOS DEL OESTE
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, SUITE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5934
OLIVER GUERRERO DUJARRIC MD
Internal Medicine (Nephrology)
1050 LOS CORAZONES AVE, SUITE 102
MAYAGUEZ, PR 00680
Mayagüez Municipio (787) 834-5334

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 Efrain Flores De Hostos's NPI number?

The NPI number for Efrain Flores De Hostos is 1083710164. It was assigned to this individual provider in the NPPES registry on September 15, 2006.

Where is Efrain Flores De Hostos located?

Efrain Flores De Hostos practices at 1050 Los Corazones Ave Suite 102, Mayaguez, PR 00680. The listed phone number is (787) 834-5334.

What is Efrain Flores De Hostos's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Efrain Flores De Hostos enrolled in Medicare?

Yes. Efrain Flores De Hostos is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Efrain Flores De Hostos's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Efrain Flores De Hostos reassigns Medicare benefits to Nefrologos Asociados Del Oeste (Mayaguez, PR). 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 Efrain Flores De Hostos'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 Efrain Flores De Hostos was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.