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MARYA CAROLINE WILLIAMSON AA
NPI 1063817575
Anesthesiologist Assistant in Tampa, FL

Active since October 27, 2014Accepts Medicare Assignment
3001 W DR MARTIN LUTHER KING JR BLVD, TAMPA, FL 33607(813) 350-7244(813) 350-7246 Get Directions Write a Review

NPPES record last updated: February 25, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 25, 2025, Apr 3, 2024, Jul 21, 2022 and 1 more (4 updates tracked since 2017).

About Marya Caroline Williamson Aa NPPES

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

MARYA CAROLINE WILLIAMSON AA (NPI 1063817575) is an individual anesthesiologist assistant in Tampa, Florida, licensed in Florida (AA249) and active in the NPI registry since October 2014. She is affiliated with St Josephs Hospital and is a graduate of Other (2014).

NPPES Registry Identity

NPI1063817575
Entity TypeIndividualFemale
Primary Taxonomy367H00000X
Provider Legal NameMARYA CAROLINE WILLIAMSONCredential: AA
Location Address3001 W DR MARTIN LUTHER KING JR BLVDTampa, FL 33607-6307
Mailing Address2995 Drew StClearwater, FL 33759-3012 · (727) 315-7496
Phone(813) 350-7244
Fax(813) 350-7246
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateOctober 27, 2014
Last NPPES UpdateFebruary 25, 20254 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2025
✔ NPI 1063817575 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367H00000X
License✔ Licensed in FL · AA249
Definition
An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.
3001 W DR MARTIN LUTHER KING JR BLVD, Tampa, FL 33607
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Other Identifiers 1

Medicaid013893200FL

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

Marya Caroline Williamson Aa 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 ID4981928363
PECOS Enrollment IDI20150112001846

Medicare Billing Reassignments

4

Medicare enrollment records show Marya Williamson reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Greater Florida Anesthesiologists, LLC
0.8 mi
Anesthesiology
5013 N ARMENIA AVE
Tampa, FL 33603
  • Reassigned Medicare billing, Florida enrollment
  • 749 clinicians in this Medicare group
NPI 1134791387 (877) 328-1119
Baycare Medical Group, Inc.
14 mi
General Practice
2995 DREW ST FL 2
Clearwater, FL 33759
  • Reassigned Medicare billing, Florida enrollment
  • 2,009 clinicians in this Medicare group
NPI 1043269871 (727) 281-9065
Sheridan Healthcorp, Inc
17 mi
Anesthesiology
701 6TH ST S
St Petersburg, FL 33701
  • Reassigned Medicare billing, Florida enrollment
  • 1,973 clinicians in this Medicare group
NPI 1295409696 (877) 328-1119
American Anesthesiology Services Of Florida, Inc.
1,022 mi
Anesthesiology
1305 WALT WHITMAN RD STE 300
Melville, NY 11747
  • Reassigned Medicare billing, Florida enrollment
  • 628 clinicians in this Medicare group
NPI 1508318387 (516) 945-3000

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.

St Josephs Hospital

Acute Care Hospitals · Tampa, FL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number100075
Location3001 W Martin Luther King Jr BlvdTampa, FL 33677 · Hillsborough County
Emergency services Birthing friendly

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.

MRS. KAYLA EDMONDS CAA
Anesthesiologist Assistant
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 350-7244
BAYCARE MEDICAL GROUP INC
Pediatrics (Pediatric Critical Care Medicine)
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 870-4619
ROLA ASHOUR
Nurse Practitioner (Family)
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 870-4000
HEIDI RUTH HESS ARNP
Nurse Practitioner
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 554-8343
YASMEEN HASHIMIE
Internal Medicine (Hematology & Oncology)
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 321-6589
MS. JULIA CHUNG AA
Anesthesiologist Assistant
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 350-7244
RAYMOND GALLAGHER
Registered Nurse (Critical Care Medicine)
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (181) 387-0400
DR. MARK D VAALER M.D.
Internal Medicine
3001 W DR MARTIN LUTHER KING JR BLVD
TAMPA, FL 33607
Hillsborough County (813) 870-4020

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 Marya Williamson's NPI number?

The NPI number for Marya Williamson is 1063817575. It was assigned to this individual provider in the NPPES registry on October 27, 2014.

Where is Marya Williamson located?

Marya Williamson practices at 3001 W Dr Martin Luther King Jr Blvd, Tampa, FL 33607. The listed phone number is (813) 350-7244.

What is Marya Williamson's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Is Marya Williamson enrolled in Medicare?

Yes. Marya Williamson 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 organizations bill Medicare for Marya Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marya Williamson reassigns Medicare benefits to 4 organizations: Greater Florida Anesthesiologists, LLC (Tampa, FL), Baycare Medical Group, Inc. (Clearwater, FL), Sheridan Healthcorp, Inc (St Petersburg, FL) and American Anesthesiology Services Of Florida, Inc. (Melville, NY). Each 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 Marya Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Marya Williamson affiliated with any hospitals?

According to CMS data, Marya Williamson is affiliated with St Josephs Hospital.

When was this NPI record last updated?

The NPPES record for Marya Williamson was last updated on February 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.