James Cassleman, M.D.
NPI 1659691863 · Family Medicine Physician · Aurora, CO
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Cassleman, M.D. is a Family Medicine Physician provider in Aurora, CO (NPI 1659691863).
Provider details
- NPI number
- 1659691863
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0101250317 (VA)
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
16 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
Mailing address
Registry dates
- Enumerated
- 2010-06-10
- Last updated
- 2026-03-25
- Certified
- 2026-03-25
Frequently asked questions
- What is James Cassleman's NPI number?
- James Cassleman's National Provider Identifier (NPI) is 1659691863, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Cassleman's specialty?
- James Cassleman is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Cassleman located?
- James Cassleman's practice location on file with NPPES is 275 S Aspen St, Aurora, CO 80011-9562.
- What is James Cassleman's phone number?
- The practice phone number listed in the NPPES registry for James Cassleman is (720) 847-9355.
- Does James Cassleman accept Medicare?
- James Cassleman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Cassleman's NPI active?
- Yes — James Cassleman's NPI (1659691863) is active in the NPPES registry as of the last update on 2026-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.