MARGARET ELIZABETH LONG M.D.
NPI 1902885577
Obstetrics & Gynecology in Rochester, MN
About Margaret Elizabeth Long M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET ELIZABETH LONG M.D. (NPI 1902885577) is an individual obstetrics & gynecology provider in Rochester, Minnesota, licensed in Minnesota (38736) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and is a graduate of Medical College Of Georgia School Of Medicine (1992).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 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
Margaret Elizabeth Long M.d. 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
2Medicare enrollment records show Margaret Long reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rochester, MN 55905
- Reassigned Medicare billing, Minnesota enrollment
- 6,534 clinicians in this Medicare group
Red Wing, MN 55066
- Reassigned Medicare billing, Minnesota enrollment
- 1,571 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic Hospital Rochester
Acute Care Hospitals · Rochester, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55905 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.
ROCHESTER, MN 55905
ROCHESTER, MN 55905
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 Long's NPI number?
The NPI number for Margaret Long is 1902885577. It was assigned to this individual provider in the NPPES registry on January 12, 2006. The provider is also known as Margaret Elizabeth Pfeifer MD.
Where is Margaret Long located?
Margaret Long practices at 200 1st St SW, Rochester, MN 55905. The listed phone number is (507) 284-2511.
What is Margaret Long's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Margaret Long enrolled in Medicare?
Yes. Margaret Long 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 Margaret Long's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Long reassigns Medicare benefits to 2 organizations: Mayo Clinic (Rochester, MN) and Mayo Clinic Health System-Southeast Minnesota Region (Red Wing, 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 Long's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Long accept?
Health plans from Sanford Health Plan list Margaret Long 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 Margaret Long affiliated with any hospitals?
According to CMS data, Margaret Long is affiliated with Mayo Clinic Hospital Rochester.
When was this NPI record last updated?
The NPPES record for Margaret Long was last updated on August 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Margaret Elizabeth Long, M.D. · NPI 1902885577
Obstetrics & Gynecology physician in Rochester, Minnesota. Individual provider, active in the CMS NPPES registry since January 12, 2006.
## Identity
- **NPI:** 1902885577 (Entity type: Individual)
- **Enumerated:** January 12, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 38736 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 1ST ST SW, Rochester, MN 55905-0001
- **Phone:** (507) 284-2511
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mayo Clinic (NPI 1114343860, Rochester, MN); Mayo Clinic Health System-Southeast Minnesota Region (NPI 1114453883, Red Wing, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Georgia School Of Medicine, class of 1992
## Record status
- **NPPES last updated:** August 18, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1902885577) · Data from the CMS NPPES public registry.