DR. XAVIER EMILIO ACOSTA DIAZ-HERNANDEZ MD
NPI 1073018586
Internal Medicine - Cardiovascular Disease in St Johns, FL
About Dr. Xavier Emilio Acosta Diaz-hernandez Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. XAVIER EMILIO ACOSTA DIAZ-HERNANDEZ MD (NPI 1073018586) is an individual cardiovascular disease provider in St Johns, Florida, licensed in Florida (ME173656) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Ascension St Vincent's Riverside, and maintains a secondary practice location in Miami.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted 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
Dr. Xavier Emilio Acosta Diaz-hernandez 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.
Medicare Billing Reassignment
Medicare enrollment records show Xavier Diaz-hernandez reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Jacksonville, FL 32204
- Reassigned Medicare billing, Florida enrollment
- Medicare enrollment name: St Vincent's Ambulatory Care Inc
- 544 clinicians in this Medicare group
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension St Vincent's Riverside
Acute Care Hospitals · Jacksonville, FLBaptist Health Medical Center - Jacksonville
Acute Care Hospitals · Jacksonville, FLFlagler Hospital
Acute Care Hospitals · Saint Augustine, FLAscension St Vincent's Southside
Acute Care Hospitals · Jacksonville, FLAscension St Vincent's St Johns County
Acute Care Hospitals · St Johns, FLPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 32259 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ST JOHNS, FL 32259
ST JOHNS, FL 32259
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 Xavier Diaz-hernandez's NPI number?
The NPI number for Xavier Diaz-hernandez is 1073018586. It was assigned to this individual provider in the NPPES registry on March 27, 2018.
Where is Xavier Diaz-hernandez located?
Xavier Diaz-hernandez practices at 300 Saint Elizabeth Way Ste 110, St Johns, FL 32259. The listed phone number is (046) 919-1009.
What is Xavier Diaz-hernandez's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Xavier Diaz-hernandez enrolled in Medicare?
Yes. Xavier Diaz-hernandez 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 Xavier Diaz-hernandez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Xavier Diaz-hernandez reassigns Medicare benefits to St Vincents Ambulatory Care Inc (Jacksonville, 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 Xavier Diaz-hernandez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Xavier Diaz-hernandez accept?
Health plans from Ambetter Health, Ambetter from Superior HealthPlan, Ambetter of Alabama, AvMed and Cigna HealthCare of Florida, Inc. and 5 other insurers list Xavier Diaz-hernandez 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 Xavier Diaz-hernandez affiliated with any hospitals?
According to CMS data, Xavier Diaz-hernandez is affiliated with Ascension St Vincent's Riverside, Baptist Health Medical Center - Jacksonville, Flagler Hospital, Ascension St Vincent's Southside and Ascension St Vincent's St Johns County.
When was this NPI record last updated?
The NPPES record for Xavier Diaz-hernandez was last updated on July 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Dr. Xavier Emilio Acosta Diaz-Hernandez, MD · NPI 1073018586
Cardiovascular Disease physician in St Johns, Florida. Individual provider, active in the CMS NPPES registry since March 27, 2018.
## Identity
- **NPI:** 1073018586 (Entity type: Individual)
- **Enumerated:** March 27, 2018
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** ME173656 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 SAINT ELIZABETH WAY STE 110, St Johns, FL 32259
- **Phone:** (046) 919-1009
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** St Vincents Ambulatory Care Inc (NPI 1417987124, Jacksonville, FL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** July 31, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1073018586) · Data from the CMS NPPES public registry.