MARGARET R WATERMAN R. N. N. P.
NPI 1104839448
Nurse Practitioner - Acute Care in South Portland, ME
About Margaret R Waterman R. N. N. P. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET R WATERMAN R. N. N. P. (NPI 1104839448) is an individual acute care provider in South Portland, Maine, licensed in Maine (CNP81968) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Margaret R Waterman R. N. N. P. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Margaret Waterman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Scarborough, ME 04074
- Reassigned Medicare billing, Maine enrollment
- 264 clinicians in this Medicare group
Rochester, NY 14620
- Reassigned Medicare billing, New York enrollment
- 1,624 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04106 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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 Waterman's NPI number?
The NPI number for Margaret Waterman is 1104839448. It was assigned to this individual provider in the NPPES registry on August 15, 2006.
Where is Margaret Waterman located?
Margaret Waterman practices at Maine Health Cancer Care 265 Western Avenue, South Portland, ME 04106. The listed phone number is (207) 661-0200.
What is Margaret Waterman's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Margaret Waterman enrolled in Medicare?
Yes. Margaret Waterman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Margaret Waterman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Waterman reassigns Medicare benefits to 2 organizations: Maine Medical Partners (Scarborough, ME) and University Of Rochester (Rochester, NY). 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 Waterman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Margaret Waterman was last updated on November 5, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 R Waterman, R. N. N. P. · NPI 1104839448
Acute Care physician in South Portland, Maine. Individual provider, active in the CMS NPPES registry since August 15, 2006.
## Identity
- **NPI:** 1104839448 (Entity type: Individual)
- **Enumerated:** August 15, 2006
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** CNP81968 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** MAINE HEALTH CANCER CARE, 265 WESTERN AVENUE, South Portland, ME 04106
- **Phone:** (207) 661-0200
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Maine Medical Partners (NPI 1346687167, Scarborough, ME); University Of Rochester (NPI 1982787537, Rochester, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 5, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1104839448) · Data from the CMS NPPES public registry.