Dr. Kien-An Duong, MD
- Medicare services, 2024
- 820
- Medicare patients, 2024
- 208
- Part D claims, 2024
- 9,119
- Hospital affiliations
- 2
- Industry payments
- $4,414
- Practice address
- 9920 Talbert Avenue, Fountain Valley, CA 92708
- Practice phone
- Call (714) 378-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Duong's professional email, personal email and mobile number
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Dr. Kien-An Duong is an internist in Fountain Valley, California
Dr. Duong practices at Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
Dr. Duong's NPI, 1033175658, was assigned on April 22, 2006. Dr. Duong graduated from New York Medical College in 2001. Dr. Duong holds California license A94108.
- NPI
- 1033175658NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890798854
- NPI enumeration date
- April 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 378-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kien-An Duong practices at Orange Coast Medical Center in Fountain Valley, California
Dr. Duong's primary practice is Orange Coast Medical Center, at 9920 Talbert Avenue, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 378-7000.
- Orange Coast Medical Center9920 Talbert Avenue, Fountain Valley, CA 92708 · Orange CountyPhone(714) 378-7000
Source: Dmand AI Affiliation Data
Dr. Kien-An Duong is affiliated with 3 sites of care and 1 medical group
Dr. Duong's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Dr. Duong is also affiliated with MemorialCare Saddleback Medical Center. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Duong to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Kien-An Duong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duong practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange Coast Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kien-An Duong is one of 16,751 internists in California
Internal medicine is Dr. Duong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Duong's licenses on file in 2 states: California and New York.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Pediatrics, New York
Internists near Dr. Duong
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Kien-An Duong billed Medicare for 820 services in 2024
CMS data shows 820 Medicare services from Dr. Duong across 9 procedure codes in 2024, for 208 Medicare patients. Medicare paid $33,425 for them.
Dr. Duong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3032024: 38025%
- Surgery
- 2023: 1642024: 18714%
- Tests and treatments
- 2023: 1192024: 1126%
- Other services
- 2023: 512024: 109114%
- Drugs given in the office
- 2023: 302024: 327%
Where Dr. Duong's Medicare services took place, 2024
- In an office72889%
- In a facility9211%
Dr. Duong compared with the California median for internists, 2024
- Dr. Duong
- California median
- Medicare services
- 820vs 3612.3 times
- Medicare patients
- 208vs 15138% above
- Part D claims
- 8,262vs 42119.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Duong's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kien-An Duong treated 208 Medicare patients in 2024, average age 76
CMS counts 208 Medicare patients who saw Dr. Duong in 2024. The largest group is 75 to 84, with 83 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 1.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Duong's median patient age at 72, with 47% women.
Dr. Duong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duong's Medicare patients by sex, 2024
- Women11354%
- Men9546%
Chronic conditions among Dr. Duong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease50%
- Diabetes42%
- Arthritis36%
- Ischemic heart disease31%
- Heart failure29%
- Depression25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kien-An Duong wrote 9,119 Medicare Part D claims in 2024
In 2024, Dr. Duong wrote 9,119 Medicare Part D claims for 568 patients. 86% of them were for generic drugs. CMS names the drug for 8,262 of them, across 138 drugs with 11 or more claims each, at $811,730 in total drug cost. In 2023, CMS named 7,930 claims across 138 drugs.
Dr. Duong's Part D claims by kind of drug, 2024
- Generic7,819 claims86%
- Brand-name1,150 claims13%
- Other150 claims2%
Dr. Duong's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Duong's Part D claims, 2024
- Opioids1%122 of 9,119 claims
- Antibiotics1%101 of 9,119 claims
- Antipsychotics, patients 65 and over0%25 of 9,119 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7,9302024: 8,2624%
Drugs named by CMS: 138 in 2024, 138 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Kien-An Duong offers telehealth to Medicare patients
Dr. Duong accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Duong as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kien-An Duong received $4,414 in industry payments from 2016 to 2025
CMS Open Payments shows 213 general payments to Dr. Duong from 29 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Amgen Inc. paid the most, $690.
General payments to Dr. Duong by program year, 2016 to 2025
General payments to Dr. Duong by kind, 2016 to 2025
- Food and beverage$4,37599%
- Education$391%
Companies that paid Dr. Duong the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kien-An Duong graduated from New York Medical College
Dr. Duong graduated from New York Medical College in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kien-An Duong's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Kien-An Duong
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Kien-An Duong's NPI number?
Dr. Kien-An Duong's NPI number is 1033175658. It was assigned on April 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kien-An Duong?
Dr. Kien-An Duong is an internist in Fountain Valley, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kien-An Duong practice?
Dr. Duong practices at 9920 Talbert Avenue, Fountain Valley, CA 92708. Dr. Duong's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Dmand AI also links Dr. Duong to 1 group practice or clinic.
What is Dr. Kien-An Duong's office phone number?
The practice phone on file for Dr. Duong is (714) 378-7000.
What is Dr. Kien-An Duong's medical license number?
Dr. Duong holds California license A94108, one of the licenses on file in 2 states.
Which states has Dr. Kien-An Duong been licensed in?
Dmand AI has state licenses on file for Dr. Duong in California and New York.
Which hospitals is Dr. Kien-An Duong affiliated with?
Dr. Duong practices at Orange Coast Medical Center in Fountain Valley, California. Dr. Duong is also affiliated with MemorialCare Saddleback Medical Center.
What medical group is Dr. Kien-An Duong part of?
Dr. Duong is linked to MemorialCare Medical Group.
Does Dr. Kien-An Duong accept Medicare?
Yes. CMS data shows Dr. Duong billed Medicare for 820 services in 2024, and Dr. Duong accepts Medicare assignment.
Does Dr. Kien-An Duong offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Duong as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Kien-An Duong see?
CMS counts 208 Medicare patients who saw Dr. Duong in 2024, with an average age of 76.
What services does Dr. Kien-An Duong bill to Medicare?
In 2024, Dr. Duong's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and hospital inpatient care (99222).
Where did Dr. Kien-An Duong go to medical school?
Dr. Duong graduated from New York Medical College in 2001.
What drugs does Dr. Kien-An Duong prescribe most?
In 2024 Medicare Part D data, Dr. Duong's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Dr. Kien-An Duong received payments from drug or device companies?
CMS Open Payments shows $4,414 in general payments to Dr. Duong from 29 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Kien-An Duong been practicing?
Dr. Duong graduated from medical school in 2001, 25 years ago.
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