Douglas Finlayson, MD
NPI 1134225543 · Family Medicine Physician · Glen Ellyn, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Finlayson, MD is a Family Medicine Physician provider in Glen Ellyn, IL (NPI 1134225543).
Provider details
- NPI number
- 1134225543
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 36-42256 (IL)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-15
- Last updated
- 2020-01-18
- Certified
- 2020-01-18
Frequently asked questions
- What is Douglas Finlayson's NPI number?
- Douglas Finlayson's National Provider Identifier (NPI) is 1134225543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Finlayson's specialty?
- Douglas Finlayson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Finlayson located?
- Douglas Finlayson's practice location on file with NPPES is 364 Pembroke Ln, Glen Ellyn, IL 60137-6643.
- What is Douglas Finlayson's phone number?
- The practice phone number listed in the NPPES registry for Douglas Finlayson is (224) 392-5796.
- Does Douglas Finlayson accept Medicare?
- Douglas Finlayson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Finlayson's NPI active?
- Yes — Douglas Finlayson's NPI (1134225543) is active in the NPPES registry as of the last update on 2020-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.