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