Physician Profile
Tan K. Nguyen, M.D.
Unclaimed ProfileAbout Dr. Nguyen
Based in Upland, CA, Tan K. Nguyen, M.D. is listed in the NPI registry under mohs surgery / dermatologic surgery. Tan is also listed as specializing in dermatology. Medicare claims data shows Tan provided 30,647 services to 1,095 patients. The services billed most often include aminolevulinic acid hcl for topical administration, 10% gel, 10 mg, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and destruction of precancer skin growth, 2-14 growths.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 946-8600
- Email not available
Practice Locations
1310 SAN BERNARDINO RD SUITE 207
Upland, CA 91786
Procedures Most Often Billed to Medicare
30,647 services · 1,095 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
889 | As often as other peers in Mohs Surgery / Dermatologic… |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
236 | More often than most peers in Mohs Surgery / Dermatologic… |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
194 | As often as other peers in Mohs Surgery / Dermatologic… |
| Injection into skin growth, more than 7 growths | Procedure | 11901 |
62 | Too few peers to compare |
| Injection into skin growth, 1-7 growths | Procedure | 11900 |
45 | More often than most peers in Mohs Surgery / Dermatologic… |
| Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm | Procedure | 11302 |
36 | As often as other peers in Mohs Surgery / Dermatologic… |
| Complicated repair of wound of trunk, 2.6-7.5 cm | Procedure | 13101 |
27 | Less often than most peers in Mohs Surgery / Dermatologic… |
| Destruction of precancer skin growth, 15 or more growths | Procedure | 17004 |
26 | Less often than most peers in Mohs Surgery / Dermatologic… |
| Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm | Procedure | 13121 |
26 | Less often than most peers in Mohs Surgery / Dermatologic… |
| Destruction of skin growth, 15 or more growths | Procedure | 17111 |
24 | Less often than most peers in Mohs Surgery / Dermatologic… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other mohs surgery / dermatologic surgeons in Upland 4
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1991 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Destruction of precancer skin growth, 2-14 growths 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Tan K. Nguyen's specialty?
Tan K. Nguyen is a mohs surgery / dermatologic surgeon in Upland, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Mohs Surgery / Dermatologic Surgery”.
NPI registry
Where can I find Tan K. Nguyen?
Tan K. Nguyen is listed at 1310 San Bernardino Rd Suite 207, Upland, CA 91786. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Tan K. Nguyen?
The number on file is (909) 946-8600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Tan K. Nguyen?
Tan K. Nguyen's National Provider Identifier is 1144273491. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Tan K. Nguyen's education?
Tan K. Nguyen attended Other, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Tan K. Nguyen have?
Tan K. Nguyen has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What is Tan K. Nguyen known for?
According to Medicare billing data, Tan K. Nguyen performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of skin growth, 1-14 growths and destruction of precancer skin growth, 1 growth; reads or performs imaging such as superficial and/or low voltage radiation treatment delivery and obtaining data needed to develop the optimal radiation treatment, 1 treatment area; provides treatments such as injection of drug or substance under skin or into muscle and therapy procedure using ultrasound, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Tan K. Nguyen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Tan K. Nguyen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.