IndividualActive
Brian Fassel, DO
NPI 1538145941 · Anesthesiology Physician · Denver, CO
Brian Fassel, DO is a Anesthesiology Physician provider in Denver, CO (NPI 1538145941).
Provider details
- NPI number
- 1538145941
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 40574 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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.
Practice location
455 Sherman
Suite 510
Denver, CO 80203-4405
Phone: (303) 377-6825
Fax: (303) 780-0787
Street-level locationGet directions
Mailing address
455 Sherman St
Denver, CO 80203-4400
Registry dates
- Enumerated
- 2005-12-16
- Last updated
- 2013-04-18
Frequently asked questions
- What is Brian Fassel's NPI number?
- Brian Fassel's National Provider Identifier (NPI) is 1538145941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Fassel's specialty?
- Brian Fassel is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Fassel located?
- Brian Fassel's practice location on file with NPPES is 455 Sherman, Denver, CO 80203-4405.
- What is Brian Fassel's phone number?
- The practice phone number listed in the NPPES registry for Brian Fassel is (303) 377-6825.
- Is Brian Fassel's NPI active?
- Yes — Brian Fassel's NPI (1538145941) is active in the NPPES registry as of the last update on 2013-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.