Jim Nguyen, D.O.
NPI 1417338898 · Nephrology Physician · San Dimas, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jim Nguyen, D.O. is a Nephrology Physician provider in San Dimas, CA (NPI 1417338898).
Provider details
- NPI number
- 1417338898
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A16296 (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
11 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
1,903 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,211 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 263 | $126 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 202 | $184 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 72 | $96 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 41 | $127 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 26 | 15 |
| Prednisone | 21 | — |
| Furosemide | 18 | — |
| Bumetanide | 16 | — |
| Clonidine Hcl | 15 | — |
| Tamsulosin Hcl | 13 | — |
| Losartan Potassium | 12 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$102 across 3 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
- 2015-06-11
- Last updated
- 2021-01-21
- Certified
- 2021-01-21
Frequently asked questions
- What is Jim Nguyen's NPI number?
- Jim Nguyen's National Provider Identifier (NPI) is 1417338898, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jim Nguyen's specialty?
- Jim Nguyen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Jim Nguyen located?
- Jim Nguyen's practice location on file with NPPES is 1335 Cypress St Ste 205, San Dimas, CA 91773-3538.
- What is Jim Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Jim Nguyen is (909) 542-2777.
- Does Jim Nguyen accept Medicare?
- Jim Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jim Nguyen's NPI active?
- Yes — Jim Nguyen's NPI (1417338898) is active in the NPPES registry as of the last update on 2021-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.