What is Tracy Diefenbach's NPI number?

Tracy Diefenbach's National Provider Identifier (NPI) is 1649940115, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Tracy Diefenbach's specialty?

Tracy Diefenbach is listed in the NPPES registry with a primary specialty of Research Study Specialist (Other Service Providers).

Where is Tracy Diefenbach located?

Tracy Diefenbach's practice location on file with NPPES is 816 2nd St Ne, Fosston, MN 56542-1519.

What is Tracy Diefenbach's phone number?

The practice phone number listed in the NPPES registry for Tracy Diefenbach is (218) 637-0399.

Is Tracy Diefenbach's NPI active?

Yes — Tracy Diefenbach's NPI (1649940115) is active in the NPPES registry as of the last update on 2025-09-18.

IndividualActive

Tracy Diefenbach, PHD MRMS CCTP

NPI 1649940115 · Research Study Specialist · Fosston, MN

Tracy Diefenbach, PHD MRMS CCTP is a Research Study Specialist provider in Fosston, MN (NPI 1649940115).

Provider details

NPI number: 1649940115
Entity type: Individual
Primary specialty: Research Study SpecialistOther Service Providers
Credential: PHD MRMS CCTP
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Research Study SpecialistPrimary1744R1102X
Other Service Providers

Profile Score

Established profile(56/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
5 yrs in NPPES registry
Profile completeness38% of score
83% 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

816 2nd St Ne

Fosston, MN 56542-1519

Phone: (218) 637-0399

Street-level locationGet directions

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Mailing address