What is Si Nguyen's specialty?

Si Nguyen (NPI 1841234952) is a Medicare-billing provider whose primary specialty is Pathology in Garden Grove, CA.

Where does Si Nguyen practice?

Si Nguyen practices in Garden Grove, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1841234952.

How much does Medicare pay Si Nguyen?

Si Nguyen (NPI 1841234952) received approximately $24K in total Medicare Part B payments, serving 279 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1841234952

Si NguyenM.D.

PathologyGarden Grove, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

476

Unique beneficiaries

—

Total services

810

Distinct HCPCS

Medicare payment

$22K

Peer benchmark

Total Medicare services vs. 1,209 Pathology providers in CA — below median (cohort median 1,423).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

93.4

Quality

88.6

Cost

77.9

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

0.77%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$146

Payment records

By payment type

Food and Beverage$146

Top paying entities

Food and Beverage$146

REFERRAL NETWORK

Where Si Nguyen'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). 24 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Reza Shahbaz Diagnostic Radiology · Orange, CA	89	185
Naser Rahbar Diagnostic Radiology · Anaheim, CA	74	228
PRIME HEALTHCARE HUNTINGTON BEACH, LLC	56	82
Thomas Ho Anesthesiology · Garden Grove, CA	46	53
Asaad Hakim Pulmonary Disease · Garden Grove, CA	37	95
Jason Shin Gastroenterology · Pomona, CA	37	85
RO, KYUNG	26	27
Khaled Chan Pulmonary Disease · Westminster, CA	26	84
Hong Kim Internal Medicine · Garden Grove, CA	24	60
Elizabeth Nghiem Infectious Disease · Fountain Valley, CA	20	42
James Lee Anesthesiology · Garden Grove, CA	20	27
SHARZER, MARK	20	34

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