1. Home
  2. Directory
  3. Florida
  4. St Petersburg
  5. Emergency Medicine
  6. NPI Profile

ALEXANDER NICHOLAS DIAZ MD
NPI 1841751849
Emergency Medicine in St Petersburg, FL

Active since March 31, 2019PECOS EnrolledAccepts Medicare Assignment
500 DR MARTIN LUTHER KING JR ST N STE 304, ST PETERSBURG, FL 33705(727) 210-5253(727) 290-4323 Get Directions Write a Review

NPPES record last updated: August 2, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Alexander Nicholas Diaz Md NPPES

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

ALEXANDER NICHOLAS DIAZ MD (NPI 1841751849) is an individual emergency medicine provider in St Petersburg, Florida, licensed in Florida (ME167124) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Holmes Regional Medical Center, and is a graduate of Univ Of Central Florida, College Of Medicine (2019).

NPPES Registry Identity

NPI1841751849
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameALEXANDER NICHOLAS DIAZCredential: MD
Location Address500 DR MARTIN LUTHER KING JR ST N STE 304St Petersburg, FL 33705-1470
Mailing Address3218 21st St NSt Petersburg, FL 33713-3055 · (954) 218-1166
Phone(727) 210-5253
Fax(727) 290-4323
Sole ProprietorYes
Medical School CMSUniv Of Central Florida, College Of MedicineGraduated 2019
Enumeration DateMarch 31, 2019
Last NPPES UpdateAugust 2, 2025
NPPES CertifiedAugust 2, 2025
✔ NPI 1841751849 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 FL · ME167124✔ Licensed in TX · T3460
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
500 DR MARTIN LUTHER KING JR ST N STE 304, St Petersburg, FL 33705
Open in Google Maps ↗

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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Oscar Insurance Company, Sendero Health Plans, Local Nonprofit.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

Alexander Nicholas Diaz Md 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 ID1759760291
PECOS Enrollment IDI20250123000653
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.

Areas of Expertise CMS Part B claims 4

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
147 services143 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
136 services124 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
64 services63 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
51 services51 patients

Hospital Affiliations CMS Care Compare 4

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

Holmes Regional Medical Center

Acute Care Hospitals · Melbourne, FL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100019
Location1350 S Hickory StMelbourne, FL 32901 · Brevard County
Emergency services Birthing friendly

St Anthonys Hospital

Acute Care Hospitals · Saint Petersburg, FL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number100067
Location1200 Seventh Ave NSaint Petersburg, FL 33705 · Pinellas County
Emergency services

Hca Florida Blake Hospital

Acute Care Hospitals · Bradenton, FL
1/5 CMS rating
OwnershipProprietary
CMS Certification Number100213
Location2020 59th St WBradenton, FL 34209 · Manatee County
Emergency services

Palm Bay Hospital

Acute Care Hospitals · Palm Bay, FL
4/5 CMS rating
OwnershipProprietary
CMS Certification Number100316
Location1425 Malabar Rd, NEPalm Bay, FL 32907 · Brevard County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33705 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.

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 Alexander Diaz's NPI number?

The NPI number for Alexander Diaz is 1841751849. It was assigned to this individual provider in the NPPES registry on March 31, 2019.

Where is Alexander Diaz located?

Alexander Diaz practices at 500 Dr Martin Luther King Jr St N Ste 304, St Petersburg, FL 33705. The listed phone number is (727) 210-5253.

What is Alexander Diaz's specialty?

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

Is Alexander Diaz enrolled in Medicare?

Yes. Alexander Diaz 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 Alexander Diaz accept?

Health plans from Blue Cross and Blue Shield of Texas, Oscar Insurance Company and Sendero Health Plans, Local Nonprofit list Alexander Diaz 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 Alexander Diaz affiliated with any hospitals?

According to CMS data, Alexander Diaz is affiliated with Holmes Regional Medical Center, St Anthonys Hospital, Hca Florida Blake Hospital and Palm Bay Hospital.

When was this NPI record last updated?

The NPPES record for Alexander Diaz was last updated on August 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.