Tan Nguyen, M.D.
NPI 1144273491 · Procedural Dermatology Physician · Upland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tan Nguyen, M.D. is a Procedural Dermatology Physician provider in Upland, CA (NPI 1144273491).
Provider details
- NPI number
- 1144273491
- Entity type
- Individual
- Primary specialty
- Procedural Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A70331 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,444 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,780 | $99 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 889 | $7 |
| Destruction of Skin Growth, 1-14 Growths17110 | 236 | $122 |
| Superficial And/Or Low Voltage Radiation Treatment Delivery77401 | 218 | $41 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 218 | $16 |
| Therapy Procedure Using Ultrasound97610 | 216 | $486 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 97 | 60 |
| Ketoconazole | 74 | 31 |
| Mometasone Furoate | 71 | 21 |
| Clobetasol Propionate | 40 | 17 |
| Fluocinonide | 25 | — |
| Tretinoin | 24 | — |
| Dupilumabbrand: Dupixent Pen | 24 | — |
| Betamethasone/Propylene Glyc |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,324 across 65 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-18
- Last updated
- 2011-08-08
Frequently asked questions
- What is Tan Nguyen's NPI number?
- Tan Nguyen's National Provider Identifier (NPI) is 1144273491, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tan Nguyen's specialty?
- Tan Nguyen is listed in the NPPES registry with a primary specialty of Procedural Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Tan Nguyen located?
- Tan Nguyen's practice location on file with NPPES is 1310 San Bernardino Rd, Upland, CA 91786-4979.
- What is Tan Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tan Nguyen is (909) 946-8600.
- Does Tan Nguyen accept Medicare?
- Tan Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tan Nguyen's NPI active?
- Yes — Tan Nguyen's NPI (1144273491) is active in the NPPES registry as of the last update on 2011-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.