ROSEMARY B. MASON LCSW
NPI 1669768800
Social Worker - Clinical in Portland, ME
About Rosemary B. Mason Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROSEMARY B. MASON LCSW (NPI 1669768800) is an individual clinical provider in Portland, Maine, licensed in Maine (LC1137) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS and is a graduate of Other (1980).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
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
Rosemary B. Mason Lcsw 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 Reassignment
Medicare enrollment records show Rosemary Mason reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saco, ME 04072
- Reassigned Medicare billing, Maine enrollment
- 200 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 04101 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.
PORTLAND, ME 04101
PORTLAND, ME 04101
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 Rosemary Mason's NPI number?
The NPI number for Rosemary Mason is 1669768800. It was assigned to this individual provider in the NPPES registry on June 27, 2011. The provider is also known as Rosemary Burke.
Where is Rosemary Mason located?
Rosemary Mason practices at 165 Lancaster St, Portland, ME 04101. The listed phone number is (207) 874-1030.
What is Rosemary Mason's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Rosemary Mason enrolled in Medicare?
Yes. Rosemary Mason 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 organization bills Medicare for Rosemary Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rosemary Mason reassigns Medicare benefits to Sweetser (Saco, ME). The 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 Rosemary Mason'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 Rosemary Mason was last updated on January 23, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Rosemary B. Mason, LCSW · NPI 1669768800
Clinical provider in Portland, Maine. Individual provider, active in the CMS NPPES registry since June 27, 2011.
## Identity
- **NPI:** 1669768800 (Entity type: Individual)
- **Enumerated:** June 27, 2011
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** LC1137 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 165 LANCASTER ST, Portland, ME 04101-2406
- **Phone:** (207) 874-1030 · **Fax:** (207) 874-1044
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Sweetser (NPI 1538122445, Saco, ME), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1980
## Record status
- **NPPES last updated:** January 23, 2015
- **Other identifiers:** Medicare PIN MM649201 (ME); Medicare PIN E400171790 (ME)
---
Source: [NPI Profile](https://npiprofile.com/npi/1669768800) · Data from the CMS NPPES public registry.