Brian O'Sullivan
NPI 1801926662 · Internal Medicine Physician · Centennial, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian O'Sullivan is a Internal Medicine Physician provider in Centennial, CO (NPI 1801926662).
Provider details
- NPI number
- 1801926662
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 43257 (CO)
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 · 138 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,276 | 361 |
| Levothyroxine Sodium | 750 | 198 |
| Simvastatin | 714 | 197 |
| Lisinopril | 693 | 189 |
| Omeprazole | 629 | 203 |
| Tamsulosin Hcl | 557 | 174 |
| Amlodipine Besylate | 545 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-07
- Last updated
- 2021-06-03
- Certified
- 2021-06-03
Frequently asked questions
- What is Brian O'Sullivan's NPI number?
- Brian O'Sullivan's National Provider Identifier (NPI) is 1801926662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian O'Sullivan's specialty?
- Brian O'Sullivan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian O'Sullivan located?
- Brian O'Sullivan's practice location on file with NPPES is 5555 E Arapahoe Rd, Centennial, CO 80122-2312.
- What is Brian O'Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Brian O'Sullivan is (303) 338-4545.
- Does Brian O'Sullivan accept Medicare?
- Brian O'Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian O'Sullivan's NPI active?
- Yes — Brian O'Sullivan's NPI (1801926662) is active in the NPPES registry as of the last update on 2021-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.