TAMMY JO OLSON D.O
NPI 1346413291
Hospitalist in Fargo, ND
About Tammy Jo Olson D.o NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY JO OLSON D.O (NPI 1346413291) is an individual hospitalist provider in Fargo, North Dakota, licensed in Minnesota (52318) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS, is affiliated with Sanford Bemidji Medical Center, and maintains a secondary practice location in Austin.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Tammy Jo Olson D.o is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Tammy Olson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
West Fargo, ND 58078
- Reassigned Medicare billing, North Dakota enrollment
- 1,464 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Sanford Bemidji Medical Center
Acute Care Hospitals · Bemidji, MNSanford Thief River Falls Medical Center
Critical Access Hospitals · Thief River Falls, MNSanford Medical Center Fargo
Acute Care Hospitals · Fargo, NDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 58104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Tammy Olson's NPI number?
The NPI number for Tammy Olson is 1346413291. It was assigned to this individual provider in the NPPES registry on April 10, 2008.
Where is Tammy Olson located?
Tammy Olson practices at 5225 23rd Ave S, Fargo, ND 58104. The listed phone number is (701) 417-2575.
What is Tammy Olson's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Tammy Olson enrolled in Medicare?
Yes. Tammy Olson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Tammy Olson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Olson reassigns Medicare benefits to Sanford Medical Center Fargo (West Fargo, ND). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tammy Olson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tammy Olson accept?
Health plans from Blue Cross Blue Shield of North Dakota list Tammy Olson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Tammy Olson affiliated with any hospitals?
According to CMS data, Tammy Olson is affiliated with Sanford Bemidji Medical Center, Sanford Thief River Falls Medical Center and Sanford Medical Center Fargo.
When was this NPI record last updated?
The NPPES record for Tammy Olson was last updated on September 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Tammy Jo Olson, D.O · NPI 1346413291
Hospitalist physician in Fargo, North Dakota. Individual provider, active in the CMS NPPES registry since April 10, 2008.
## Identity
- **NPI:** 1346413291 (Entity type: Individual)
- **Enumerated:** April 10, 2008
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 52318 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 5225 23RD AVE S, Fargo, ND 58104-7927
- **Phone:** (701) 417-2575
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Sanford Medical Center Fargo (NPI 1184917924, West Fargo, ND), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** September 22, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1346413291) · Data from the CMS NPPES public registry.