Ronald Yamaguchi, MD
NPI 1104905843 · Urology Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Yamaguchi, MD is a Urology Physician provider in Santa Clara, CA (NPI 1104905843).
Provider details
- NPI number
- 1104905843
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G79384 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Finasteride | 482 | 179 |
| Tamsulosin Hcl | 225 | 93 |
| Terazosin Hcl | 136 | 50 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 55 | 43 |
| Ciprofloxacin Hcl | 44 | 38 |
| Trospium Chloride | 31 | 17 |
| Cephalexin | 30 | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-03
- Last updated
- 2021-12-06
Frequently asked questions
- What is Ronald Yamaguchi's NPI number?
- Ronald Yamaguchi's National Provider Identifier (NPI) is 1104905843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Yamaguchi's specialty?
- Ronald Yamaguchi is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Yamaguchi located?
- Ronald Yamaguchi's practice location on file with NPPES is 710 Lawrence Expy, Santa Clara, CA 95051-5173.
- What is Ronald Yamaguchi's phone number?
- The practice phone number listed in the NPPES registry for Ronald Yamaguchi is (408) 851-1000.
- Does Ronald Yamaguchi accept Medicare?
- Ronald Yamaguchi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Yamaguchi's NPI active?
- Yes — Ronald Yamaguchi's NPI (1104905843) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.