Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. MARIANA DIAZ
NPI 1194429795
Pediatrics in Jacksonville, FL

Q: What is Mariana Diaz's NPI number?

The NPI number for Mariana Diaz is 1194429795. It was assigned to this individual provider in the NPPES registry on March 28, 2023. The provider is also known as Mariana Santo Do.

Q: What is Mariana Diaz's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Mariana Diaz was last updated on June 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 57 days 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.

Active since March 28, 2023PECOS Enrolled

655 W 8TH ST, JACKSONVILLE, FL 32209(904) 633-4199 Get Directions Write a Review

NPPES record last updated: June 25, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 2, 2024, Mar 28, 2023 (2 updates tracked since 2023).

On this page

About Mrs. Mariana Diaz NPPES

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

MRS. MARIANA DIAZ (NPI 1194429795) is an individual pediatrics provider in Jacksonville, Florida, licensed in Florida (OS23420) and active in the NPI registry since March 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1194429795

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameMRS. MARIANA DIAZ

Location Address655 W 8TH STJacksonville, FL 32209-6511

Mailing AddressPo Box 44008Jacksonville, FL 32231-4008

Phone(904) 633-4199

Sole ProprietorNo

Enumeration DateMarch 28, 2023

Last NPPES UpdateJune 25, 20262 updates tracked since enumeration

NPPES CertifiedJune 25, 2026

✔ NPI 1194429795 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in FL · OS23420

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

655 W 8TH ST, Jacksonville, FL 32209

Open in Google Maps ↗

Other Names 1

Former Name (1)Mariana Santo Do

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Mariana Diaz 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32209 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

$87.62 typical visit price

range $56.00 – $171.84

Typical copayment $21.90 (range $14.00 – $42.96)

Most-billed visit code 99203

Established Patient

$99.16 typical visit price

range $17.57 – $139.16

Typical copayment $24.79 (range $4.39 – $34.79)

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. MATTHEW DUWAIN WARRICK M.D.

Anesthesiology