Douglas Tollefsen, MD
NPI 1679599815 · Hematology (Internal Medicine) Physician · Saint Louis, MO
Douglas Tollefsen, MD is a Hematology (Internal Medicine) Physician provider in Saint Louis, MO (NPI 1679599815).
Provider details
- NPI number
- 1679599815
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R9558 (MO)
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
- 2006-07-14
- Last updated
- 2018-01-29
Frequently asked questions
- What is Douglas Tollefsen's NPI number?
- Douglas Tollefsen's National Provider Identifier (NPI) is 1679599815, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Tollefsen's specialty?
- Douglas Tollefsen is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Tollefsen located?
- Douglas Tollefsen's practice location on file with NPPES is 4921 Parkview Pl Fl 7, Saint Louis, MO 63110-1032.
- What is Douglas Tollefsen's phone number?
- The practice phone number listed in the NPPES registry for Douglas Tollefsen is (314) 362-8808.
- Is Douglas Tollefsen's NPI active?
- Yes — Douglas Tollefsen's NPI (1679599815) is active in the NPPES registry as of the last update on 2018-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.