Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Tien Quang Nguyen, MD

Individual provider Dermatology Physician · NPI 1396741351

Dr. Tien Quang Nguyen, MD practises Dermatology in Fountain Valley, California. Graduated from University of Florida College of Medicine in 1982, 44 years ago. Practices with Tien Q Nguyen Inc, a 12-clinician group and accepts Medicare assignment. Licensed in California and Nevada.

Years since qualifying
44
Trained at
University of Florida College of Medicine
Licensed in
CA, NV
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

17271 Brookhurst St
Fountain Valley, CA 92708-3701
Phone: (714) 531-2966
Fax: (714) 531-3495
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence G50454 (CA)
Dermatology Physician Taxonomy 207N00000X · Licence 20979 (NV)

Record details

NPI number1396741351
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 24, 2005
Last updated in NPPESApril 1, 2025
Certification dateApril 1, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDERMATOLOGY
Medical schoolUNIVERSITY OF FLORIDA COLLEGE OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Tien Q Nguyen Inc — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1,948 times · 98th percentile
Skin biopsy 245 times · 88th percentile
Melanoma (skin cancer) excision 20 times · 74th percentile
Removal of skin cancer 1–10 times
Removal or shaving of skin growth 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,593
Services billed 14,943 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $207,442 69 payments
Consulting Fee $53,595 18 payments
Travel and Lodging $18,804 59 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $10,259 259 payments · a meal or drink at a meeting or visit, not a fee
Honoraria $6,600 2 payments

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Tien Q Nguyen Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 12 clinicians in the practice; 7 are shown here.

Other providers in Fountain Valley