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HOANGLONG TIEN NGUYEN MD
NPI 1164715736
Internal Medicine in Sylmar, CA

Active since May 16, 2011PECOS Enrolled
14445 OLIVE VIEW DR, SYLMAR, CA 91342(818) 364-3205 Get Directions Write a Review

NPPES record last updated: December 23, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hoanglong Tien Nguyen Md NPPES

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

HOANGLONG TIEN NGUYEN MD (NPI 1164715736) is an individual internal medicine provider in Sylmar, California, licensed in California (A130677) and active in the NPI registry since May 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164715736
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameHOANGLONG TIEN NGUYENCredential: MD
Location Address14445 OLIVE VIEW DRSylmar, CA 91342-1437
Mailing Address14445 Olive View Dr # 2b-182Sylmar, CA 91342-1437
Phone(818) 364-3205
Sole ProprietorYes
Enumeration DateMay 16, 2011
Last NPPES UpdateDecember 23, 2019
✔ NPI 1164715736 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A130677
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
14445 OLIVE VIEW DR, Sylmar, CA 91342
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hoanglong Tien Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Hoanglong Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Los Angeles Auditor Controller
0.2 mi
General Acute Care Hospital
14445 OLIVE VIEW DR
Sylmar, CA 91342
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of Los Angeles
  • 1,939 clinicians in this Medicare group
NPI 1134159320 (818) 364-3031

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91342 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555
DENNIS POON
Nurse Practitioner (Family)
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3000
SERENA KE MD
Student in an Organized Health Care Education/Training Program
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
DR. PAUL I LIU M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
14445 OLIVE VIEW DR, ROOM 1A116
SYLMAR, CA 91342
Los Angeles County (818) 364-4033
DR. ARTHUR JENG M.D.
Internal Medicine (Infectious Disease)
14445 OLIVE VIEW DR, 2B182
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
MRS. CECILIA CORONADO PTA
Physical Therapy Assistant
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-4245
COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555
MR. ANDRIY A KUZNETSOV PT
Physical Therapist
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-4245

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 Hoanglong Nguyen's NPI number?

The NPI number for Hoanglong Nguyen is 1164715736. It was assigned to this individual provider in the NPPES registry on May 16, 2011.

Where is Hoanglong Nguyen located?

Hoanglong Nguyen practices at 14445 Olive View Dr, Sylmar, CA 91342. The listed phone number is (818) 364-3205.

What is Hoanglong Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Hoanglong Nguyen enrolled in Medicare?

Yes. Hoanglong Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hoanglong Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hoanglong Nguyen reassigns Medicare benefits to County Of Los Angeles Auditor Controller (Sylmar, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Hoanglong Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Hoanglong Nguyen was last updated on December 23, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.