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DR. JOHN WINSTON DUGGAN JR. M.D., M.S.
NPI 1851313514
Specialist in San Jose, CA

Active since July 24, 2006PECOS EnrolledAccepts Medicare Assignment
2516 SAMARITAN DR STE N, SAN JOSE, CA 95124(408) 358-1600(408) 358-1610 Get Directions Write a Review

NPPES record last updated: April 9, 2019. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Apr 9, 2019, Dec 26, 2018 (2 updates tracked since 2018).

About Dr. John Winston Duggan Jr. M.d., M.s. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN WINSTON DUGGAN JR. M.D., M.S. (NPI 1851313514) is an individual specialist in San Jose, California, licensed in California (G683170) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (1988).

NPPES Registry Identity

NPI1851313514
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. JOHN WINSTON DUGGAN JR.Credential: M.D., M.S.
Location Address2516 SAMARITAN DR STE NSan Jose, CA 95124-4108
Mailing Address2516 Samaritan Dr Ste NSan Jose, CA 95124-4108 · (408) 358-1600 · Fax (408) 358-1610
Phone(408) 358-1600
Fax(408) 358-1610
Sole ProprietorYes
Medical School CMSTufts University School Of MedicineGraduated 1988
Enumeration DateJuly 24, 2006
Last NPPES UpdateApril 9, 20192 updates tracked since enumeration
✔ NPI 1851313514 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CA · G683170
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
2516 SAMARITAN DR STE N, San Jose, CA 95124
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Other Identifiers 1

Other77 0317827CA · Tin

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Winston Duggan Jr. M.d., M.s. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6709043755
PECOS Enrollment IDI20120203000073
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
45 services45 patients
Established patient problem focused exam of visual system 92012
This is a routine check-up for existing patients focusing on the visual system. It involves examining your eyes to detect any potential issues or changes in your vision. It's a crucial part of maintaining good eye health.
35 services27 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
24 services24 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
15 services15 patients
Photography of the retina 92250
Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.
11 services11 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
78%431 patients3/55-star benchmark: 100%
Diabetic Retinopathy: Communication with the Physician Managing Ongoing Diabetes Care
Percentage of patients aged 18 years and older with a diagnosis of diabetic retinopathy who had a dilated macular or fundus exam performed with documented communication to the physician who manages the ongoing care of the patient with diabetes mellitus…
15%354 patients1/55-star benchmark: 100%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
39%3,842 patients1/55-star benchmark: 100%
Primary Open-Angle Glaucoma (POAG): Optic Nerve Evaluation
Percentage of patients aged 18 years and older with a diagnosis of primary open-angle glaucoma (POAG) who have an optic nerve head evaluation during one or more office visits within 12 months
41%561 patients1/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Duggan's NPI number?

The NPI number for John Duggan is 1851313514. It was assigned to this individual provider in the NPPES registry on July 24, 2006.

Where is John Duggan located?

John Duggan practices at 2516 Samaritan Dr Ste N, San Jose, CA 95124. The listed phone number is (408) 358-1600.

What is John Duggan's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is John Duggan enrolled in Medicare?

Yes. John Duggan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does John Duggan accept?

Health plans from Providence Health Plan list John Duggan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John Duggan was last updated on April 9, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.