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

Dr. John Winston Duggan Jr., MD, MS

Individual provider Specialist · NPI 1851313514

Dr. John Winston Duggan Jr., MD, MS is an Ophthalmology in San Jose, California. Graduated from Tufts University School of Medicine in 1988, 38 years ago. Practices with Desert Ophthalmology Medical Corporation, a 5-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
38
Trained at
Tufts University School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

2516 Samaritan Dr Ste N
San Jose, CA 95124-4108
Phone: (408) 358-1600
Fax: (408) 358-1610
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence G683170 (CA)

Record details

NPI number1851313514
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MS
Sole proprietorYes
NPI enumeratedJuly 24, 2006
Last updated in NPPESApril 9, 2019

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Desert Ophthalmology Medical Corporation — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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