DR. MALLERY OLSEN MD
NPI 1649664871
Pediatrics - Pediatric Hematology-Oncology in Minneapolis, MN
About Dr. Mallery Olsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MALLERY OLSEN MD (NPI 1649664871) is an individual pediatric hematology-oncology provider in Minneapolis, Minnesota, licensed in Minnesota (80064) and active in the NPI registry since March 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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
Dr. Mallery Olsen 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
5Medicare enrollment records show Mallery Olsen reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Minneapolis, MN 55454
- Reassigned Medicare billing, Minnesota enrollment
- 2,373 clinicians in this Medicare group
Minneapolis, MN 55454
- Reassigned Medicare billing, Minnesota enrollment
- 3,633 clinicians in this Medicare group
Minneapolis, MN 55454
- Reassigned Medicare billing, Minnesota enrollment
- Medicare enrollment name: University Of Minnesota Physicians
- 1,453 clinicians in this Medicare group
Minneapolis, MN 55455
- Reassigned Medicare billing, Minnesota enrollment
- 1,662 clinicians in this Medicare group
Minneapolis, MN 55404
- Reassigned Medicare billing, Minnesota enrollment
- 1,247 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.
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.
MINNEAPOLIS, MN 55454
MINNEAPOLIS, MN 55454
MINNEAPOLIS, MN 55454
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 Mallery Olsen's NPI number?
The NPI number for Mallery Olsen is 1649664871. It was assigned to this individual provider in the NPPES registry on March 25, 2015.
Where is Mallery Olsen located?
Mallery Olsen practices at 2450 Riverside Ave, Minneapolis, MN 55454. The listed phone number is (612) 365-8100.
What is Mallery Olsen's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is Mallery Olsen enrolled in Medicare?
Yes. Mallery Olsen 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 Mallery Olsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mallery Olsen reassigns Medicare benefits to 5 organizations: Fairview Specialty Services (Minneapolis, MN), Fairview Express Care (Minneapolis, MN), University Of Minnesota Pediatric Dental Clinic (Minneapolis, MN), University Of Minnesota Health Clinics And Surgery Center Inc (Minneapolis, MN) and Hennepin Healthcare System, Inc (Minneapolis, MN). 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 Mallery Olsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mallery Olsen accept?
Health plans from Antidote Health Plan of Arizona, Inc. and Medica list Mallery Olsen 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.
When was this NPI record last updated?
The NPPES record for Mallery Olsen was last updated on October 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.
# Dr. Mallery Olsen, MD · NPI 1649664871
Pediatric Hematology-Oncology physician in Minneapolis, Minnesota. Individual provider, active in the CMS NPPES registry since March 25, 2015.
## Identity
- **NPI:** 1649664871 (Entity type: Individual)
- **Enumerated:** March 25, 2015
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 80064 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 2450 RIVERSIDE AVE, Minneapolis, MN 55454-1450
- **Phone:** (612) 365-8100
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Fairview Specialty Services (NPI 1043199334, Minneapolis, MN); Fairview Express Care (NPI 1841428745, Minneapolis, MN); University Of Minnesota Pediatric Dental Clinic (NPI 1992075287, Minneapolis, MN); University Of Minnesota Health Clinics And Surgery Center Inc (NPI 1003485004, Minneapolis, MN); Hennepin Healthcare System, Inc (NPI 1962914333, Minneapolis, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** October 24, 2025
- **Other identifiers:** Medicaid 163982 (AZ)
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Source: [NPI Profile](https://npiprofile.com/npi/1649664871) · Data from the CMS NPPES public registry.