Aaron Nguyen, M.D.
NPI 1609863885 · Urology Physician · Pomona, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Nguyen, M.D. is a Urology Physician provider in Pomona, CA (NPI 1609863885).
Provider details
- NPI number
- 1609863885
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G81615 (CA)
Specialties & taxonomies
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
1,007 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 332 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 158 | $97 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 102 | $13 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 96 | $179 |
| Urinalysis, Manual Test81002 | 89 | $3 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 472 | 133 |
| Vibegronbrand: Gemtesa | 211 | 58 |
| Levofloxacin | 200 | 167 |
| Solifenacin Succinate | 173 | 55 |
| Finasteride | 134 | 39 |
| Mirabegronbrand: Myrbetriq | 131 | 38 |
| Silodosin | 104 | 28 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,107 across 52 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
- 2005-10-03
- Last updated
- 2014-07-15
Frequently asked questions
- What is Aaron Nguyen's NPI number?
- Aaron Nguyen's National Provider Identifier (NPI) is 1609863885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Nguyen's specialty?
- Aaron Nguyen is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Nguyen located?
- Aaron Nguyen's practice location on file with NPPES is 210 W Bonita Ave, Pomona, CA 91767-1865.
- What is Aaron Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Aaron Nguyen is (909) 623-3428.
- Does Aaron Nguyen accept Medicare?
- Aaron Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Nguyen's NPI active?
- Yes — Aaron Nguyen's NPI (1609863885) is active in the NPPES registry as of the last update on 2014-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.