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

Zachary J Fleissner, DO

Individual provider Anesthesiology Physician · NPI 1033773494

Zachary J Fleissner, DO is an Anesthesiology in Jacksonville, Florida. Graduated from Lake Erie College of Osteopathic Medicine, Erie in 2019, 7 years ago. Practices with Mayo Clinic Jacksonville, a 1,581-clinician group and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
7
Trained at
Lake Erie College of Osteopathic Medicine, Erie
Licensed in
FL
In the registry since
2019
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

4500 San Pablo Rd S
Jacksonville, FL 32224-1865
Phone: (904) 953-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence OS19666 (FL)

Record details

NPI number1033773494
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 30, 2019
Last updated in NPPESJune 13, 2023
Certification dateJune 13, 2023
Mailing address4500 San Pablo Rd S, Jacksonville, FL 32224-1865

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolLAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE
Graduated 2019 (7 years in practice)
Group practice Mayo Clinic Jacksonville — 1581 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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