Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. CALVIN CARDIN LOKEN M.D.
NPI 1912932922
Specialist in Duluth, MN

Q: What is Calvin Loken's NPI number?

The NPI number for Calvin Loken is 1912932922. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Q: What is Calvin Loken's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Calvin Loken was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 11, 2006

925 E SUPERIOR ST, DULUTH, MN 55802(218) 722-3700(218) 722-8705 Get Directions Write a Review

NPPES record last updated: August 16, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

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About Dr. Calvin Cardin Loken M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CALVIN CARDIN LOKEN M.D. (NPI 1912932922) is an individual specialist in Duluth, Minnesota, licensed in Minnesota (23268) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1912932922

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. CALVIN CARDIN LOKENCredential: M.D.

Location Address925 E SUPERIOR STDuluth, MN 55802-2238

Mailing Address5910 Bergquist RdDuluth, MN 55804-8622 · (218) 525-3933

Phone(218) 722-3700

Fax(218) 722-8705

Sole ProprietorYes

Enumeration DateJuly 11, 2006

Last NPPES UpdateAugust 16, 2026

✔ NPI 1912932922 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in MN · 23268

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

925 E SUPERIOR ST, Duluth, MN 55802

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Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. REBECCA LYNN KUNTZ MD

Radiology (Diagnostic Radiology)

925 E SUPERIOR ST, SUITE 109
DULUTH, MN 55802

St. Louis County (218) 722-3700

MISS CHRISTINA MARIE LORENTZ PT

Physical Therapist

925 E SUPERIOR ST
DULUTH, MN 55802

St. Louis County (218) 728-1100

DR. WILLIAM E. JOHNSON MD

Radiology (Diagnostic Radiology)

925 E SUPERIOR ST, SUITE109
DULUTH, MN 55802

St. Louis County (218) 722-3700

DR. KATHRYNNE MARIE DRYKE D.D.S.

Dentist (General Practice)

925 E SUPERIOR ST, 101
DULUTH, MN 55802

St. Louis County (218) 728-4488

FREDRICK E EKBERG M.D.

Radiology (Diagnostic Radiology)

925 E SUPERIOR ST, SUITE 109
DULUTH, MN 55802

St. Louis County (218) 722-3700

HOME DIALYSIS DULUTH KIDNEY SERVICES

Internal Medicine (Nephrology)

925 E SUPERIOR ST, SUITE 106
DULUTH, MN 55802

St. Louis County (218) 249-6230

DR. JAMES T JAROSZ DDS

Dentist (General Practice)

925 E SUPERIOR ST, SUITE 101
DULUTH, MN 55802

St. Louis County (218) 728-4488

DR. MARY S NETT MD

Radiology (Diagnostic Radiology)

925 E SUPERIOR ST, SUITE 109
DULUTH, MN 55802

St. Louis County (218) 722-3700

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Calvin Loken's NPI number?

The NPI number for Calvin Loken is 1912932922. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Calvin Loken located?

Calvin Loken practices at 925 E Superior St, Duluth, MN 55802. The listed phone number is (218) 722-3700.

What is Calvin Loken's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for Calvin Loken was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.