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

Dr. Hassan Ali Hassan, MD

Individual provider Hematology & Oncology Physician · NPI 1285862185

Dr. Hassan Ali Hassan, MD practises Hematology/Oncology in St Augustine, Florida. Graduated from Southern Illinois University School of Medicine in 2009, 17 years ago. Practices with Mercy Clinic Joplin LLC, a 295-clinician group and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
17
Trained at
Southern Illinois University School of Medicine
Licensed in
FL
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

121 Whitehall Dr
St Augustine, FL 32086-5266
Phone: (904) 825-4500
Fax: (904) 825-3672
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence ME124175 (FL)

Record details

NPI number1285862185
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2009
Last updated in NPPESApril 25, 2022
Certification dateApril 25, 2022

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolSOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Mercy Clinic Joplin Llc — 295 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 patients88
Services billed 304 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mercy Clinic Joplin LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 295 clinicians in the practice; 12 are shown here.

Other providers in St Augustine