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

Dr. William Marshall Portnoy, MD

Individual provider Otolaryngology/Facial Plastic Surgery Physician · NPI 1104913185

Dr. William Marshall Portnoy, MD is an Otolaryngology in Miami, Florida. Graduated from George Washington University School of Medicine in 1987, 39 years ago. Practices with ENT and Allergy Associates of Florida, LLC, a 227-clinician group and accepts Medicare assignment. Licensed in Florida and New York.

Years since qualifying
39
Trained at
George Washington University School of Medicine
Licensed in
FL, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3100 SW 62nd Ave Ste 124
Miami, FL 33155-3009
Phone: (305) 662-8377
Fax: (305) 663-8513
Show map & directions

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

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 150098 (FL)
Otolaryngology/Facial Plastic Surgery Physician Taxonomy 207YX0905X · Licence 175480 (NY)

Record details

NPI number1104913185
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 9, 2006
Last updated in NPPESJuly 7, 2022
Certification dateJuly 7, 2022

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Ent And Allergy Associates Of Florida, Llc — 227 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount