GREGORY OLSZEWSKI MD
NPI 1952741050
Family Medicine in Minneapolis, MN
About Gregory Olszewski Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY OLSZEWSKI MD (NPI 1952741050) is an individual family medicine provider in Minneapolis, Minnesota, licensed in Minnesota (61333) and active in the NPI registry since July 2013. He is enrolled in Medicare PECOS, is affiliated with Lake View Memorial Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Gregory Olszewski Md 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 Reassignments
10Medicare enrollment records show Gregory Olszewski reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dassel, MN 55325
- Reassigned Medicare billing, Minnesota enrollment
- 125 clinicians in this Medicare group
Milaca, MN 56353
- Reassigned Medicare billing, Minnesota enrollment
- 97 clinicians in this Medicare group
Blue Earth, MN 56013
- Reassigned Medicare billing, Minnesota enrollment
- 51 clinicians in this Medicare group
Moose Lake, MN 55767
- Reassigned Medicare billing, Minnesota enrollment
- 222 clinicians in this Medicare group
Mountain Lake, MN 56159
- Reassigned Medicare billing, Minnesota enrollment
- Also billed through NPI 1780781054 (Minnesota)
- 279 clinicians in this Medicare group
Montevideo, MN 56265
- Reassigned Medicare billing, Minnesota enrollment
- 149 clinicians in this Medicare group
Cloquet, MN 55720
- Reassigned Medicare billing, Minnesota enrollment
- 513 clinicians in this Medicare group
Cloquet, MN 55720
- Reassigned Medicare billing, Minnesota enrollment
- 93 clinicians in this Medicare group
Wheaton, MN 56296
- Reassigned Medicare billing, Minnesota enrollment
- Also billed through NPI 1043218753 (Minnesota)
- 219 clinicians in this Medicare group
Grand Marais, MN 55604
- Reassigned Medicare billing, Minnesota enrollment
- 81 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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lake View Memorial Hospital
Critical Access Hospitals · Two Harbors, MNNorth Shore Health
Critical Access Hospitals · Grand Marais, MNChippewa County Hospital
Critical Access Hospitals · Montevideo, MNUnited Hospital District
Critical Access Hospitals · Blue Earth, MNSanford Thief River Falls Medical Center
Critical Access Hospitals · Thief River Falls, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Gregory Olszewski's NPI number?
The NPI number for Gregory Olszewski is 1952741050. It was assigned to this individual provider in the NPPES registry on July 3, 2013.
Where is Gregory Olszewski located?
Gregory Olszewski practices at 19 S 1st St Apt B2603, Minneapolis, MN 55401. The listed phone number is (651) 269-5941.
What is Gregory Olszewski's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Gregory Olszewski enrolled in Medicare?
Yes. Gregory Olszewski 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 organizations bill Medicare for Gregory Olszewski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Olszewski reassigns Medicare benefits to 10 organizations: County Of Meeker (Dassel, MN), Mille Lacs Health System (Milaca, MN), United Hospital District Inc. (Blue Earth, MN), Essentia Health Moose Lake (Moose Lake, MN), Sanford Health Network (Mountain Lake, MN) and 5 more organizations, listed in the Medicare section above. Each 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 Gregory Olszewski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Olszewski accept?
Health plans from Wellmark Health Plan of Iowa, Inc. list Gregory Olszewski 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 Gregory Olszewski affiliated with any hospitals?
According to CMS data, Gregory Olszewski is affiliated with Lake View Memorial Hospital, North Shore Health, Chippewa County Hospital, United Hospital District and Sanford Thief River Falls Medical Center.
When was this NPI record last updated?
The NPPES record for Gregory Olszewski was last updated on November 2, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Gregory Olszewski, MD · NPI 1952741050
Family Medicine physician in Minneapolis, Minnesota. Individual provider, active in the CMS NPPES registry since July 3, 2013.
## Identity
- **NPI:** 1952741050 (Entity type: Individual)
- **Enumerated:** July 3, 2013
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 61333 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 19 S 1ST ST APT B2603, Minneapolis, MN 55401-1845
- **Phone:** (651) 269-5941
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 10 organizations under Medicare reassignment (form CMS-855R): County Of Meeker (NPI 1952555146, Dassel, MN); Mille Lacs Health System (NPI 1417108531, Milaca, MN); United Hospital District Inc. (NPI 1952307688, Blue Earth, MN); Essentia Health Moose Lake (NPI 1154959880, Moose Lake, MN); Sanford Health Network (NPI 1568469039, Mountain Lake, MN); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 2013
## Record status
- **NPPES last updated:** November 2, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1952741050) · Data from the CMS NPPES public registry.