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

MASSIEL ALEXANDRA SANTOS DIAZ ARNP
NPI 1063014165
Nurse Practitioner in Ormond Beach, FL

Active since November 12, 2020PECOS EnrolledAccepts Medicare Assignment
1474 W GRANADA BLVD STE 455, ORMOND BEACH, FL 32174(386) 231-4685(386) 231-4687 Get Directions Write a Review

NPPES record last updated: October 7, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 7, 2026, Dec 31, 2025, Nov 12, 2020 (3 updates tracked since 2020).

About Massiel Alexandra Santos Diaz Arnp NPPES

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

MASSIEL ALEXANDRA SANTOS DIAZ ARNP (NPI 1063014165) is an individual nurse practitioner in Ormond Beach, Florida, licensed in Florida (APRN11010165) and active in the NPI registry since November 2020. She is enrolled in Medicare PECOS, is affiliated with Adventhealth Daytona Beach, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1063014165
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMASSIEL ALEXANDRA SANTOS DIAZCredential: ARNP
Location Address1474 W GRANADA BLVD STE 455Ormond Beach, FL 32174-8240
Mailing Address1474 W Granada Blvd Ste 455Ormond Beach, FL 32174-8240 · (386) 231-4685 · Fax (386) 231-4687
Phone(386) 231-4685
Fax(386) 231-4687
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateNovember 12, 2020
Last NPPES UpdateOctober 7, 20263 updates tracked since enumeration
NPPES CertifiedOctober 7, 2026
✔ NPI 1063014165 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in FL · APRN11010165
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License AP61173621 (WA)
1474 W GRANADA BLVD STE 455, Ormond Beach, FL 32174
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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

Massiel Alexandra Santos Diaz Arnp 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 ID9032507819
PECOS Enrollment IDI20250702004376
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 Massiel Santos Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Adventhealth Primary Care Network Inc
46 mi
Family Medicine
900 HOPE WAY
Altamonte Springs, FL 32714
  • Reassigned Medicare billing, Florida enrollment
  • 395 clinicians in this Medicare group
NPI 1093493637 (407) 357-1000

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 2

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

Adventhealth Daytona Beach

Acute Care Hospitals · Daytona Beach, FL
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number100068
Location301 Memorial Medical ParkwayDaytona Beach, FL 32117 · Volusia County
Emergency services Birthing friendly

Florida Hospital Flagler

Acute Care Hospitals · Palm Coast, FL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number100118
Location60 Memorial Medical PkwyPalm Coast, FL 32164 · Flagler County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32174 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

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

DELAYNA SIQUEIRA FNP
Nurse Practitioner (Family)
1474 W GRANADA BLVD STE 455
ORMOND BEACH, FL 32174
Flagler County (386) 231-4685

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 Massiel Santos Diaz's NPI number?

The NPI number for Massiel Santos Diaz is 1063014165. It was assigned to this individual provider in the NPPES registry on November 12, 2020.

Where is Massiel Santos Diaz located?

Massiel Santos Diaz practices at 1474 W Granada Blvd Ste 455, Ormond Beach, FL 32174. The listed phone number is (386) 231-4685.

What is Massiel Santos Diaz's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Massiel Santos Diaz enrolled in Medicare?

Yes. Massiel Santos 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.

Which organization bills Medicare for Massiel Santos Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Massiel Santos Diaz reassigns Medicare benefits to Adventhealth Primary Care Network Inc (Altamonte Springs, FL). 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 Massiel Santos Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Massiel Santos Diaz affiliated with any hospitals?

According to CMS data, Massiel Santos Diaz is affiliated with Adventhealth Daytona Beach and Florida Hospital Flagler.

When was this NPI record last updated?

The NPPES record for Massiel Santos Diaz was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.