Brian Nielsen, DO
NPI 1710143573 · Internal Medicine Physician · Colton, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Nielsen, DO is a Internal Medicine Physician provider in Colton, CA (NPI 1710143573).
Provider details
- NPI number
- 1710143573
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A10451 (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
17 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefuroxime Axetilbrand: Cefuroxime | 34 | 34 |
| Azithromycin | 22 | 22 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 22 | 22 |
| Amlodipine Besylate | 18 | 11 |
| Atorvastatin Calcium | 18 | — |
| Pantoprazole Sodium | 18 | 11 |
| Prednisone |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-31
- Last updated
- 2021-12-01
Frequently asked questions
- What is Brian Nielsen's NPI number?
- Brian Nielsen's National Provider Identifier (NPI) is 1710143573, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Nielsen's specialty?
- Brian Nielsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Nielsen located?
- Brian Nielsen's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is Brian Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Brian Nielsen is (909) 580-1000.
- Does Brian Nielsen accept Medicare?
- Brian Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Nielsen's NPI active?
- Yes — Brian Nielsen's NPI (1710143573) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.