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KIEN-AN DUONG MD
NPI 1033175658
Internal Medicine in Laguna Woods, CA

Active since April 22, 2006PECOS EnrolledAccepts Medicare Assignment
24268 EL TORO ROAD, LAGUNA WOODS, CA 92637(657) 241-8455(657) 295-2116 Get Directions Write a Review

NPPES record last updated: January 31, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Kien-an Duong Md NPPES

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

KIEN-AN DUONG MD (NPI 1033175658) is an individual internal medicine provider in Laguna Woods, California, licensed in California (A94108) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2001).

NPPES Registry Identity

NPI1033175658
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameKIEN-AN DUONGCredential: MD
Location Address24268 EL TORO ROADLaguna Woods, CA 92637
Mailing Address24268 El Toro Rd.Laguna Woods, CA 92637 · (657) 241-8455 · Fax (657) 295-2116
Phone(657) 241-8455
Fax(657) 295-2116
Sole ProprietorNo
Medical School CMSNew York Medical CollegeGraduated 2001
Enumeration DateApril 22, 2006
Last NPPES UpdateJanuary 31, 2025
NPPES CertifiedJanuary 31, 2025
✔ NPI 1033175658 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 · A94108
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 ListedPediatricsTaxonomy 208000000X · License 236804 (NY)
24268 EL TORO ROAD, Laguna Woods, CA 92637
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Other Identifiers 1

Medicaid00A941080CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Kien-an Duong Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890798854
PECOS Enrollment IDI20060810000594
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 Kien-an Duong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Memorialcare Medical Foundation
15 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622

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

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
231 services99 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
187 services81 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
92 services90 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
69 services22 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
57 services41 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
46 services45 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92637 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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers18 claims69 services$5.06 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
5 suppliers16 claims30 services$0.75 avg. paid by Medicare
Continuous positive airway pressure (cpap) device E0601
DME-Other DME · category DE001N
3 suppliers11 claims11 services$28.72 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

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

DR. PETER VINCENT PHILLIP DANGVU M.D.
Family Medicine
24268 EL TORO ROAD
LAGUNA WOODS, CA 92637
Orange County (657) 241-8455
TALAR TAHA MOY FNP
Nurse Practitioner (Family)
24268 EL TORO ROAD
LAGUNA WOODS, CA 92637
Orange County (657) 241-8455
DR. JAMES JONG LEE M.D.
Internal Medicine
24268 EL TORO ROAD
LAGUNA WOODS, CA 92637
Orange County (657) 241-8455

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 Kien-an Duong's NPI number?

The NPI number for Kien-an Duong is 1033175658. It was assigned to this individual provider in the NPPES registry on April 22, 2006.

Where is Kien-an Duong located?

Kien-an Duong practices at 24268 El Toro Road, Laguna Woods, CA 92637. The listed phone number is (657) 241-8455.

What is Kien-an Duong's specialty?

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

Is Kien-an Duong enrolled in Medicare?

Yes. Kien-an Duong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Kien-an Duong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kien-an Duong reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, 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 Kien-an 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 Kien-an Duong was last updated on January 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.