HARRY G NAZARIO DIAZ
NPI 1396310678
Emergency Medicine in Fresno, CA

Q: What is Harry Nazario Diaz's NPI number?

The NPI number for Harry Nazario Diaz is 1396310678. It was assigned to this individual provider in the NPPES registry on May 20, 2021.

Q: What is Harry Nazario Diaz's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Active since May 20, 2021PECOS EnrolledAccepts Medicare Assignment

1303 E HERNDON AVE, FRESNO, CA 93720(559) 450-3000 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 3, 2026, Jul 16, 2026, Jun 17, 2025 and 3 more (6 updates tracked since 2021).

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About Harry G Nazario Diaz NPPES

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

HARRY G NAZARIO DIAZ (NPI 1396310678) is an individual emergency medicine provider in Fresno, California, licensed in Connecticut (84147) and active in the NPI registry since May 2021. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Ctr, and is a graduate of University Of Puerto Rico School Of Medicine (2019).

NPPES Registry Identity

NPI1396310678

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameHARRY G NAZARIO DIAZ

Location Address1303 E HERNDON AVEFresno, CA 93720-3309

Mailing Address5655 N Millbrook AveFresno, CA 93710-6404 · (787) 646-6307

Phone(559) 450-3000

Sole ProprietorNo

Medical School CMSUniversity Of Puerto Rico School Of MedicineGraduated 2019

Enumeration DateMay 20, 2021

Last NPPES UpdateAugust 3, 20266 updates tracked since enumeration

NPPES CertifiedAugust 3, 2026

✔ NPI 1396310678 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

Licenses✔ Licensed in CT · 84147✔ Licensed in CA · A200218✔ Licensed in MA · 1027449

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

1303 E HERNDON AVE, Fresno, CA 93720

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Harry G Nazario Diaz 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 ID1759894264

PECOS Enrollment IDI20250627003360

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 Reassignments

Medicare enrollment records show Harry Nazario Diaz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - California

Same address

Emergency Medicine

1303 E HERNDON AVE
Fresno, CA 93720

Reassigned Medicare billing, California enrollment
2,323 clinicians in this Medicare group

NPI 1396172615 (559) 450-3000

Cep America LLC

2,499 mi

Emergency Medicine

56 FRANKLIN ST
Waterbury, CT 06706

Reassigned Medicare billing, Connecticut enrollment
100 clinicians in this Medicare group

NPI 1700681202 (203) 709-6000

Vituity-Massachusetts PLLC

2,516 mi

Emergency Medicine

271 CAREW ST
Springfield, MA 01104

Reassigned Medicare billing, Massachusetts enrollment
62 clinicians in this Medicare group

NPI 1083404313 (413) 748-9000

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

Hospital Affiliations CMS Care Compare

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

Mercy Medical Ctr

Acute Care Hospitals · Springfield, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220066

Location271 Carew StreetSpringfield, MA 01104 · Hampden County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93720 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

$90.32 typical visit price

range $58.87 – $176.60

Typical copayment $22.58 (range $14.71 – $44.15)

Most-billed visit code 99203

Established Patient

$103.36 typical visit price

range $19.28 – $144.60

Typical copayment $25.84 (range $4.82 – $36.15)

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.

MINA EMAD HANDAL MD

Student in an Organized Health Care Education/Training Program