Quick answers
- Does Christina B. Brennan accept Medicare assignment?
- Yes. Medicare's clinician data says Christina B. Brennan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Christina B. Brennan see?
- In 2024, CMS data shows 1,712 Original Medicare patients and 9,665 services for Christina B. Brennan. This counts Original Medicare only and measures volume, not quality.
- What is Christina B. Brennan's NPI number?
- 1215265814. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Christina B. Brennan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,712 |
|---|---|
| Services billed to Medicare | 9,665 |
| Different services or procedures | 57 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)3,832 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,838 services
- Destruction of precancer skin growth, 1 growth (17000)1,177 services
- Biopsy of related skin growth, first growth (11102)608 services
- Destruction of skin growth, 1-14 growths (17110)482 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure69%
- Arthritis49%
- Ischemic heart disease30%
- Diabetes19%
- Anxiety19%
Practice locations
Addresses where Christina B. Brennan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1750 Tree Blvd, Suite 1St Augustine, FL 32084 (904) 824‑4005
Group practices
Medicare enrollment lists Christina B. Brennan as a member of this group (CMS data updated October 2, 2026).
- Florida Ent Associates Inc156 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in St Augustine
Clinicians with the same Medicare primary specialty in St Augustine, FL — not a recommendation.
Other clinicians in Florida Ent Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215265814 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians