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Calvin Loken, M.D.
NPI 1912932922 · Specialist · Duluth, MN
Calvin Loken, M.D. is a Specialist provider in Duluth, MN (NPI 1912932922).
Provider details
- NPI number
- 1912932922
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 23268 (MN)
Specialties & taxonomies
Other Service Providers
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
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
925 E Superior St
Duluth, MN 55802-2238
Phone: (218) 722-3700
Fax: (218) 722-8705
Street-level locationGet directions
Mailing address
5910 Bergquist Rd
Duluth, MN 55804-8622
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2007-07-08
Frequently asked questions
- What is Calvin Loken's NPI number?
- Calvin Loken's National Provider Identifier (NPI) is 1912932922, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Loken's specialty?
- Calvin Loken is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Calvin Loken located?
- Calvin Loken's practice location on file with NPPES is 925 E Superior St, Duluth, MN 55802-2238.
- What is Calvin Loken's phone number?
- The practice phone number listed in the NPPES registry for Calvin Loken is (218) 722-3700.
- Is Calvin Loken's NPI active?
- Yes — Calvin Loken's NPI (1912932922) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.