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

Dr. Mark Tony Williams, MD

Individual provider Ophthalmology Physician · NPI 1780118802

Dr. Mark Tony Williams, MD is an Ophthalmology in Orange, California. Graduated from University of California, San Francisco School of Medicine in 2017, 9 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
9
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA
In the registry since
2017
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

1310 W Stewart Dr Ste 303
Orange, CA 92868-3838
Phone: (714) 738-4621
Fax: (714) 409-0629
Show map & directions

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

Specialties & licences

Retina Specialist (Ophthalmology) Physician (primary) Taxonomy 207WX0107X · Licence A187615 (CA)
Ophthalmology Physician Taxonomy 207W00000X · Licence A187615 (CA)

Record details

NPI number1780118802
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 14, 2017
Last updated in NPPESMarch 11, 2025
Certification dateFebruary 14, 2025
Mailing addressPo Box 14107, Irvine, CA 92623-4107

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 2017 (9 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Orange