Tammy Olson, D.O
NPI 1346413291 · Hospitalist Physician · Fargo, ND
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Olson, D.O is a Hospitalist Physician provider in Fargo, ND (NPI 1346413291).
Provider details
- NPI number
- 1346413291
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
232 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 221 | $163 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $123 |
Typical Medicare-allowed amounts for these services range $123–$163 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1000 1st Dr NwMayo Clinic Health System - AustinAustin, MN 55912-2941Phone: (507) 434-1928
Registry dates
- Enumerated
- 2008-04-10
- Last updated
- 2023-09-22
- Certified
- 2023-09-22
Frequently asked questions
- What is Tammy Olson's NPI number?
- Tammy Olson's National Provider Identifier (NPI) is 1346413291, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Olson's specialty?
- Tammy Olson is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Tammy Olson located?
- Tammy Olson's practice location on file with NPPES is 5225 23rd Ave S, Fargo, ND 58104-7927.
- What is Tammy Olson's phone number?
- The practice phone number listed in the NPPES registry for Tammy Olson is (701) 417-2575.
- Does Tammy Olson accept Medicare?
- Tammy Olson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Olson's NPI active?
- Yes — Tammy Olson's NPI (1346413291) is active in the NPPES registry as of the last update on 2023-09-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.