Dr. An Quoc Dang, MD
- Medicare services, 2024
- 796
- Medicare patients, 2024
- 226
- Part D claims, 2024
- 2,252
- Hospital affiliations
- 2
- Industry payments
- $1,681
- Practice address
- 14014 Magnolia St, Westminster, CA 92683
- Practice phone
- Call (714) 897-5659
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
DaVita Westminster South Dialysis
Dialysis Center - Independent · Westminster, California
Find Dr. Dang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. An Quoc Dang is a nephrologist in Westminster, California
Dr. Dang practices at DaVita Westminster South Dialysis in Westminster, California.
Dr. Dang's NPI, 1952302564, was assigned on August 4, 2005. Dr. Dang graduated from David Geffen School of Medicine at UCLA in 1995. Dr. Dang holds California license A65421.
- NPI
- 1952302564NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941474043
- NPI enumeration date
- August 4, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 897-5659
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. An Quoc Dang practices at DaVita Westminster South Dialysis in Westminster, California
Dr. Dang's primary practice is DaVita Westminster South Dialysis, at 14014 Magnolia St, Westminster, CA 92683 in Orange County. The practice phone is (714) 897-5659.
- DaVita Westminster South Dialysis14014 Magnolia St, Westminster, CA 92683 · Orange CountyPhone(714) 897-5659
Source: Dmand AI Affiliation Data
Dr. An Quoc Dang is affiliated with 7 sites of care
Dr. Dang's primary practice is DaVita Westminster South Dialysis in Westminster, California. Dr. Dang is also affiliated with UCI Health - Orange. Dmand AI also links Dr. Dang to 1 more hospital, 3 dialysis centers and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. An Quoc Dang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dang practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| DaVita Westminster South Dialysis | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. An Quoc Dang is one of 1,401 nephrologists in California
Nephrology is Dr. Dang's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dmand AI has Dr. Dang's licenses on file in 2 states: California and Louisiana.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
- Louisiana license
Clinical focus
Dmand AI lists chronic kidney disease and fluid and electrolyte imbalances among the conditions Dr. Dang treats.
Nephrologists near Dr. Dang
Counts of nephrologists 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. An Quoc Dang billed Medicare for 796 services in 2024
CMS data shows 796 Medicare services from Dr. Dang across 9 procedure codes in 2024, for 226 Medicare patients. Medicare paid $94,004 for them.
Dr. Dang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5962024: 594No change
- Tests and treatments
- 2023: 2582024: 20222%
Where Dr. Dang's Medicare services took place, 2024
- In an office58774%
- In a facility20926%
Dr. Dang compared with the California median for nephrologists, 2024
- Dr. Dang
- California median
- Medicare services
- 796vs 1,08427% below
- Medicare patients
- 226vs 30726% below
- Part D claims
- 1,942vs 9552.0 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Dang'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Dang and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. An Quoc Dang treated 226 Medicare patients in 2024, average age 77
CMS counts 226 Medicare patients who saw Dr. Dang in 2024. The largest group is 75 to 84, with 98 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. Their average risk score is 2.69, 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. Dang's median patient age at 77, with 44% women.
Dr. Dang's Medicare patients by age, 2024
Dr. Dang's Medicare patients by sex, 2024
- Women9642%
- Men13058%
Chronic conditions among Dr. Dang's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes72%
- Arthritis57%
- Ischemic heart disease38%
- Heart failure29%
- Osteoporosis25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Dang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. An Quoc Dang wrote 2,252 Medicare Part D claims in 2024
In 2024, Dr. Dang wrote 2,252 Medicare Part D claims for 186 patients. 84% of them were for generic drugs. CMS names the drug for 1,942 of them, across 55 drugs with 11 or more claims each, at $250,060 in total drug cost. In 2023, CMS named 1,917 claims across 55 drugs.
Dr. Dang's Part D claims by kind of drug, 2024
- Generic1,897 claims84%
- Brand-name and other355 claims16%
Dr. Dang'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. Dang's Part D claims, 2024
- Opioids1%13 of 2,252 claims
- Antibiotics2%38 of 2,252 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: 1,9172024: 1,9421%
Drugs named by CMS: 55 in 2024, 55 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
How Dr. An Quoc Dang takes part in Medicare
Dr. Dang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. An Quoc Dang received $1,681 in industry payments from 2016 to 2025
CMS Open Payments shows 22 general payments to Dr. Dang from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Novartis Pharmaceuticals Corporation paid the most, $308.
General payments to Dr. Dang by program year, 2016 to 2025
General payments to Dr. Dang by kind, 2016 to 2025
- Food and beverage$1,67199%
- Education$101%
Companies that paid Dr. Dang 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. An Quoc Dang graduated from David Geffen School of Medicine at UCLA
Dr. Dang graduated from David Geffen School of Medicine at UCLA in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. An Quoc Dang accepts plans from 9 insurance carriers
Dr. Dang is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- CMS Medicare
- +1 more carriersWith a free account
Plan types Dr. Dang accepts, by number of carriers
- Medicare8
- PPO6
- HMO5
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. An Quoc Dang'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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. An Quoc Dang
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. An Quoc Dang's NPI number?
Dr. An Quoc Dang's NPI number is 1952302564. It was assigned on August 4, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. An Quoc Dang?
Dr. An Quoc Dang is a nephrologist in Westminster, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. An Quoc Dang practice?
Dr. Dang practices at 14014 Magnolia St, Westminster, CA 92683. Dr. Dang's primary practice is DaVita Westminster South Dialysis in Westminster, California. Dmand AI also links Dr. Dang to 1 hospital, 3 dialysis centers and 1 physician office.
What is Dr. An Quoc Dang's office phone number?
The practice phone on file for Dr. Dang is (714) 897-5659.
What is Dr. An Quoc Dang's medical license number?
Dr. Dang holds California license A65421, one of the licenses on file in 2 states.
Which states has Dr. An Quoc Dang been licensed in?
Dmand AI has state licenses on file for Dr. Dang in California (1998 to 2026) and Louisiana (1995 to 2002).
Which hospitals is Dr. An Quoc Dang affiliated with?
Dr. Dang is affiliated with UCI Health - Orange. Dmand AI links Dr. Dang to 1 more hospital.
Does Dr. An Quoc Dang accept Medicare?
Yes. CMS data shows Dr. Dang billed Medicare for 796 services in 2024, and Dr. Dang accepts Medicare assignment.
How many Medicare patients does Dr. An Quoc Dang see?
CMS counts 226 Medicare patients who saw Dr. Dang in 2024, with an average age of 77.
What services does Dr. An Quoc Dang bill to Medicare?
In 2024, Dr. Dang's most billed Medicare services were office visit, established patient (99214), dialysis (90962) and hospital inpatient care (99232).
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Where did Dr. An Quoc Dang go to medical school?
Dr. Dang graduated from David Geffen School of Medicine at UCLA in 1995.
What drugs does Dr. An Quoc Dang prescribe most?
In 2024 Medicare Part D data, Dr. Dang's most prescribed drugs by claims were Amlodipine Besylate, Losartan Potassium and Doxazosin Mesylate.
Has Dr. An Quoc Dang received payments from drug or device companies?
CMS Open Payments shows $1,681 in general payments to Dr. Dang from 11 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. An Quoc Dang been practicing?
Dr. Dang graduated from medical school in 1995, 31 years ago.
What insurance does Dr. An Quoc Dang accept?
Dr. Dang is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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