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GRETCHEN NEYMAR MARRERO LOZADA
NPI 1891295812
Internal Medicine - Nephrology in Miami, FL

Active since February 16, 2018PECOS EnrolledAccepts Medicare Assignment
1611 NW 12TH AVE, MIAMI, FL 33136(305) 585-1111 Get Directions Write a Review

NPPES record last updated: May 29, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 29, 2026, Apr 29, 2026, Apr 2, 2023 and 3 more (6 updates tracked since 2018).

About Gretchen Neymar Marrero Lozada NPPES

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

GRETCHEN NEYMAR MARRERO LOZADA (NPI 1891295812) is an individual nephrology provider in Miami, Florida, licensed in Florida (ME173171) and active in the NPI registry since February 2018. She is enrolled in Medicare PECOS, is affiliated with Jackson Health System, and maintains a secondary practice location in Coral Gables.

NPPES Registry Identity

NPI1891295812
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameGRETCHEN NEYMAR MARRERO LOZADA
Location Address1611 NW 12TH AVEMiami, FL 33136-1005
Mailing Address5555 Ponce De Leon BlvdCoral Gables, FL 33146-2513
Phone(305) 585-1111
Sole ProprietorNo
Medical School CMSUniversity Of Puerto Rico School Of MedicineGraduated 2020
Enumeration DateFebruary 16, 2018
Last NPPES UpdateMay 29, 20266 updates tracked since enumeration
NPPES CertifiedMay 29, 2026
✔ NPI 1891295812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in FL · ME173171
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License ME173171 (FL)
1611 NW 12TH AVE, Miami, FL 33136
Open in Google Maps ↗

Secondary Practice Location 1

Location 15555 Ponce De Leon BlvdCoral Gables, FL 33146-2513 · Phone (305) 243-6251

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gretchen Neymar Marrero Lozada is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456870294
PECOS Enrollment IDI20250527000193
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Jackson Health System

Acute Care Hospitals · Miami, FL
1/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number100022
Location1611 NW 12th AveMiami, FL 33136 · Miami-Dade County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33136 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
$141.56 typical visit price
range $60.92 – $187.05
Typical copayment $35.39 (range $15.23 – $46.76)
Most-billed visit code 99204
Established Patient
$107.17 typical visit price
range $18.99 – $150.24
Typical copayment $26.79 (range $4.74 – $37.56)
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 20

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

DR. AKUA GYANEWAH ASARE MD
Student in an Organized Health Care Education/Training Program
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 355-8264
MARILUZ SANCHEZ PHARM.D.
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1611 NW 12TH AVE, PHARMACY ADM. OFFICES/EAST TOWER BASEMENT 069
MIAMI, FL 33136
Miami-Dade County (305) 585-7309
DR. TASHA JOYTI N. D. COOKE TASHA COOKE
Student in an Organized Health Care Education/Training Program
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 243-3670
DR. JUANITA ANN MARIE HUNTER M.D.
Pediatrics (Pediatric Cardiology)
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 585-6042
WANDA LAVERNE MCGOWAN-BRAYNEN ARNP
Nurse Practitioner (Adult Health)
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 585-1111
DR. PERTTI KALEVI HAKALA M.D.
Anesthesiology
1611 NW 12TH AVE, CENTRAL 300
MIAMI, FL 33136
Miami-Dade County (305) 585-6970
JAYLOU M VELEZ TORRES M.D.
Pathology (Anatomic Pathology)
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 585-8381
ANNE-ISABELLE SOPHIA REME MD
Surgery
1611 NW 12TH AVE
MIAMI, FL 33136
Miami-Dade County (305) 585-1280

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 Gretchen Marrero Lozada's NPI number?

The NPI number for Gretchen Marrero Lozada is 1891295812. It was assigned to this individual provider in the NPPES registry on February 16, 2018.

Where is Gretchen Marrero Lozada located?

Gretchen Marrero Lozada practices at 1611 NW 12th Ave, Miami, FL 33136. The listed phone number is (305) 585-1111.

What is Gretchen Marrero Lozada's specialty?

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

Is Gretchen Marrero Lozada enrolled in Medicare?

Yes. Gretchen Marrero Lozada is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Gretchen Marrero Lozada accept?

Health plans from AmeriHealth Caritas Next, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and Molina Healthcare list Gretchen Marrero Lozada as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gretchen Marrero Lozada affiliated with any hospitals?

According to CMS data, Gretchen Marrero Lozada is affiliated with Jackson Health System.

When was this NPI record last updated?

The NPPES record for Gretchen Marrero Lozada was last updated on May 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.