What is John Duggan's specialty?

John Duggan (NPI 1851313514) is a Medicare-billing provider whose primary specialty is Ophthalmology in San Jose, CA.

Where does John Duggan practice?

John Duggan practices in San Jose, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1851313514.

How much does Medicare pay John Duggan?

John Duggan (NPI 1851313514) received approximately $12K in total Medicare Part B payments, serving 78 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1851313514

John DugganM.D., M.S.

OphthalmologySan Jose, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

122

Unique beneficiaries

—

Total services

130

Distinct HCPCS

Medicare payment

$11K

Peer benchmark

Total Medicare services vs. 2,144 Ophthalmology providers in CA — bottom quintile (cohort median 1,859).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where John Duggan's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 9 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
GOOD SAMARITAN HOSPITAL, L.P.	47	79
NPI 1447682380	33	54
Edmund Tai Hematology-Oncology · Mountain View, CA	21	69
John Smith Internal Medicine · Los Gatos, CA	21	38
LABORATORY CORPORATION OF AMERICA	18	37
Forest Ambulatory Surgical Associates Llc Ambulatory Surgical Center · San Jose, CA	16	26
William Warshal Family Practice · Los Gatos, CA	15	24
FOX, DONALD	11	12
Manjula Kamaraju Family Practice · San Jose, CA	11	19

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events