Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Teresa Marie Brennan, DO

Individual provider Family Medicine Physician · NPI 1154391753

Dr. Teresa Marie Brennan, DO is registered under Family Practice in St Augustine, Florida. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1982, 44 years ago. Practices with Island Doctors Intrastate LLC, a 76-clinician group and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
44
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
FL
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2460 #5 Old Moultrie Avenue
St Augustine, FL 32086-4198
Phone: (904) 797-5740
Fax: (904) 797-5749
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence OS11702 (FL)

Record details

NPI number1154391753
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 25, 2006
Last updated in NPPESFebruary 19, 2026
Certification dateFebruary 19, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1982 (44 years in practice)
Group practice Island Doctors Intrastate Llc — 76 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients37
Services billed 81 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $480 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Island Doctors Intrastate LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 76 clinicians in the practice; 12 are shown here.

Other providers in St Augustine