What is Tan Nguyen's specialty?

Tan Nguyen (NPI 1609839299) is a Medicare-billing provider whose primary specialty is Internal Medicine in Garden Grove, CA.

Where does Tan Nguyen practice?

Tan Nguyen practices in Garden Grove, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1609839299.

How much does Medicare pay Tan Nguyen?

Medicare Part B utilization, prescribing (Part D), MIPS quality scores, and industry payments for Tan Nguyen (NPI 1609839299) are detailed on this CareTrace profile.

PROVIDER PROFILE · NPI 1609839299

Tan Nguyen

PRACTICEDAT Q NGUYEN, MD, INCSee all providers at this practice →

Internal MedicineGarden Grove, CAI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

PRESCRIBING · PART D · 2024

Total Rx claims

1,833

Beneficiaries

—

Total drug cost

$135K

Distinct drugs

Brand share

15.4%

Top prescribed drugs

Atorvastatin Calcium181 claims

Amlodipine Besylate108 claims

Gabapentin94 claims

Metformin Hcl75 claims

Losartan Potassium66 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Tan 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). 63 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
American Medical Response Ambulance Service, Inc. Ambulance Service Provider · San Diego, CA	85	296
PHAM, TAM-THAO	85	428
CLAIREMONT HEALTHCARE & WELLNESS CENTRE, LLC	68	513
David Riker Pulmonary Disease · San Diego, CA	68	419
SHARP MEMORIAL HOSPITAL	65	304
TONY TAN NGUYEN MD INC	62	271
SAN DIEGO MEDICAL SERVICES ENTERPRISE, LLC	53	211
Lawrence Bogle Diagnostic Radiology · San Diego, CA	34	557
Asim Guha Roy Internal Medicine · San Diego, CA	33	113
ALVARADO HOSPITAL, LLC	32	65
Max Laufer Inc. Ambulance Service Provider · Lemon Grove, CA	31	80
Scott Boles Diagnostic Radiology · San Diego, CA	28	107

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