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DR. JOSEAN OMAR FLORES SANTIAGO MD
NPI 1467938795
Internal Medicine - Nephrology in Mayaguez, PR

Active since July 19, 2018PECOS Enrolled
14 CALLE PERAL N STE 1C, MAYAGUEZ, PR 00680(939) 301-3030 Get Directions Write a Review

NPPES record last updated: September 16, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 16, 2025, Jul 1, 2025, Nov 3, 2023 and 5 more (8 updates tracked since 2018).

About Dr. Josean Omar Flores Santiago Md NPPES

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

DR. JOSEAN OMAR FLORES SANTIAGO MD (NPI 1467938795) is an individual nephrology provider in Mayaguez, Puerto Rico, licensed in Puerto Rico (023329) and active in the NPI registry since July 2018. He is enrolled in Medicare PECOS and is a graduate of Ponce School Of Medicine (2016).

NPPES Registry Identity

NPI1467938795
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. JOSEAN OMAR FLORES SANTIAGOCredential: MD
Location Address14 CALLE PERAL N STE 1CMayaguez, PR 00680-4872
Mailing AddressPo Box 3374Mayaguez, PR 00681-3374 · (939) 301-3030
Phone(939) 301-3030
Sole ProprietorYes
Medical School CMSPonce School Of MedicineGraduated 2016
Enumeration DateJuly 19, 2018
Last NPPES UpdateSeptember 16, 20258 updates tracked since enumeration
NPPES CertifiedSeptember 16, 2025
✔ NPI 1467938795 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 · 023329
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.

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. Josean Omar Flores Santiago Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID547684409
PECOS Enrollment IDI20230829003484
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 Josean Flores Santiago reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Advanced Renal Care Institute
Multi-Specialty
349 AV HOSTOS MEDICAL EMPORIUM II SUITE A-3
Mayaguez, PR 00680
  • Reassigned Medicare billing, Puerto Rico enrollment
  • 2 clinicians in this Medicare group
NPI 1982830956 (787) 834-2785

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

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
30 services11 patients

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.

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 Josean Flores Santiago's NPI number?

The NPI number for Josean Flores Santiago is 1467938795. It was assigned to this individual provider in the NPPES registry on July 19, 2018.

Where is Josean Flores Santiago located?

Josean Flores Santiago practices at 14 Calle Peral N Ste 1C, Mayaguez, PR 00680. The listed phone number is (939) 301-3030.

What is Josean Flores Santiago's specialty?

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

Is Josean Flores Santiago enrolled in Medicare?

Yes. Josean Flores Santiago is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Josean Flores Santiago's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Josean Flores Santiago reassigns Medicare benefits to Advanced Renal Care Institute (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 Josean Flores Santiago'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 Josean Flores Santiago was last updated on September 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.