DR. MARGARET L MACMILLAN MD
NPI 1881771947
Pediatrics - Pediatric Hematology-Oncology in Minneapolis, MN
About Dr. Margaret L Macmillan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET L MACMILLAN MD (NPI 1881771947) is an individual pediatric hematology-oncology provider in Minneapolis, Minnesota, licensed in Minnesota (41502) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 14
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Margaret L Macmillan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Margaret Macmillan reassigns Medicare billing to 4 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
- 3,633 clinicians in this Medicare group
Minneapolis, MN 55454
- Reassigned Medicare billing, Minnesota enrollment
- 2,373 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
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 4
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
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 Margaret Macmillan's NPI number?
The NPI number for Margaret Macmillan is 1881771947. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Margaret Macmillan located?
Margaret Macmillan practices at 2450 Riverside Ave SE East Building Journey Clinic 9E, Minneapolis, MN 55454. The listed phone number is (612) 365-8100.
What is Margaret Macmillan's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is Margaret Macmillan enrolled in Medicare?
Yes. Margaret Macmillan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Margaret Macmillan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Macmillan reassigns Medicare benefits to 4 organizations: Fairview Express Care (Minneapolis, MN), Fairview Specialty Services (Minneapolis, MN), University Of Minnesota Pediatric Dental Clinic (Minneapolis, MN) and University Of Minnesota Health Clinics And Surgery Center 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 Margaret Macmillan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Macmillan accept?
Health plans from Sanford Health Plan list Margaret Macmillan 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 Margaret Macmillan was last updated on April 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. Margaret L Macmillan, MD · NPI 1881771947
Pediatric Hematology-Oncology physician in Minneapolis, Minnesota. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1881771947 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 41502 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 2450 RIVERSIDE AVE SE, EAST BUILDING JOURNEY CLINIC 9E, Minneapolis, MN 55454
- **Phone:** (612) 365-8100
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Fairview Express Care (NPI 1841428745, Minneapolis, MN); Fairview Specialty Services (NPI 1043199334, 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) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 11, 2012
- **Other identifiers:** Medicaid 0517722 (IA); Other HP28790 (MN); Medicaid 214519700 (MN); and 11 more
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Source: [NPI Profile](https://npiprofile.com/npi/1881771947) · Data from the CMS NPPES public registry.