1. Home
  2. Directory
  3. California
  4. Long Beach
  5. Internal Medicine
  6. NPI Profile

JOHN T. DUONG M.D.
NPI 1356364889
Internal Medicine in Long Beach, CA

Active since July 25, 2006PECOS Enrolled
4540 E 7TH ST, LONG BEACH, CA 90804(562) 344-1150(562) 344-1155 Get Directions Write a Review

NPPES record last updated: January 18, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About John T. Duong M.d. NPPES

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

JOHN T. DUONG M.D. (NPI 1356364889) is an individual internal medicine provider in Long Beach, California, licensed in California (A66685) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Torrance.

NPPES Registry Identity

NPI1356364889
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJOHN T. DUONGCredential: M.D.
Location Address4540 E 7TH STLong Beach, CA 90804-4327
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(562) 344-1150
Fax(562) 344-1155
Sole ProprietorYes
Enumeration DateJuly 25, 2006
Last NPPES UpdateJanuary 18, 2026
NPPES CertifiedJanuary 18, 2026
✔ NPI 1356364889 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A66685
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.
4540 E 7TH ST, Long Beach, CA 90804
Open in Google Maps ↗

Secondary Practice Location 1

Location 119191 S Vermont AveTorrance, CA 90502-1018 · Phone (310) 354-4221

Other Identifiers 2

Medicaid00A666850CA
Other00A666850Blue Shield Id #

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John T. Duong M.d. 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 Reassignments

3

Medicare enrollment records show John Duong reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Healthcare Partners Affiliates Medical Group
18 mi
Addiction Medicine
14591 NEWPORT AVE
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1891981502 (714) 442-4864
Healing Garden Medical Clinic
26 mi
Clinic/Center
210 S KENWOOD ST STE 100
Glendale, CA 91205
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1730037003 (747) 777-2808
Carequest Mobile Doctors & Wound Specialists
33 mi
Infectious Disease
13749 VICTORY BLVD STE B
Van Nuys, CA 91401
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1124831755 (818) 601-8844

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 90804 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 8

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

MISS LINH THUY TON NP-C
Nurse Practitioner (Adult Health)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
NAZIYA NIZARALI CHARANIYA NP-C
Nurse Practitioner (Family)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
JOAN GUTIERREZ ANDERSON FAMILY NP
Nurse Practitioner (Family)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
NANSI ANN CUNANAN SIBAL NURSE PRACTITIONER
Nurse Practitioner (Family)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
CAROLINE FRUSHOUR N.P.
Nurse Practitioner (Gerontology)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
CAREMORE HEALTH PLAN
Nurse Practitioner (Family)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
DR. JIMMY DIEP M.D.
Internal Medicine
4540 E 7TH ST, ATTENTION: MAGGIE NOLES
LONG BEACH, CA 90804
Los Angeles County (562) 344-1150
VANESSA AVEIRO PA-C
Physician Assistant (Medical)
4540 E 7TH ST
LONG BEACH, CA 90804
Los Angeles County (562) 562-3441

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 John Duong's NPI number?

The NPI number for John Duong is 1356364889. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is John Duong located?

John Duong practices at 4540 E 7th St, Long Beach, CA 90804. The listed phone number is (562) 344-1150.

What is John Duong's specialty?

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

Is John Duong enrolled in Medicare?

Yes. John Duong is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Duong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Duong reassigns Medicare benefits to 3 organizations: Healthcare Partners Affiliates Medical Group (Tustin, CA), Healing Garden Medical Clinic (Glendale, CA) and Carequest Mobile Doctors & Wound Specialists (Van Nuys, CA). Each 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 John Duong'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 John Duong was last updated on January 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.