MARGARET ULLMANN-WEIL RD
NPI 1952374894
Dietitian, Registered in Cambridge, MA
About Margaret Ullmann-weil Rd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET ULLMANN-WEIL RD (NPI 1952374894) is an individual dietitian, registered in Cambridge, Massachusetts, licensed in Massachusetts (832) and active in the NPI registry since February 2006. She is a graduate of Michigan State University College Of Human Medicine (1979).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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 Ullmann-weil Rd 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 Margaret Ullmann-weil reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cambridge, MA 02138
- Reassigned Medicare billing, Massachusetts enrollment
- 1,317 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02138 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.
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 Ullmann-weil's NPI number?
The NPI number for Margaret Ullmann-weil is 1952374894. It was assigned to this individual provider in the NPPES registry on February 10, 2006.
Where is Margaret Ullmann-weil located?
Margaret Ullmann-weil practices at 1611 Cambridge St, Cambridge, MA 02138. The listed phone number is (617) 629-6444.
What is Margaret Ullmann-weil's specialty?
The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.
Is Margaret Ullmann-weil enrolled in Medicare?
Yes. Margaret Ullmann-weil 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 Margaret Ullmann-weil's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Ullmann-weil reassigns Medicare benefits to Atrius Health, Inc. (Cambridge, MA). 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 Margaret Ullmann-weil'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 Ullmann-weil was last updated on October 28, 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 Ullmann-Weil, RD · NPI 1952374894
Dietitian, Registered provider in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since February 10, 2006.
## Identity
- **NPI:** 1952374894 (Entity type: Individual)
- **Enumerated:** February 10, 2006
- **Primary specialty:** Dietitian, Registered · taxonomy 133V00000X
- **State license:** 832 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1611 CAMBRIDGE ST, Cambridge, MA 02138-4302
- **Phone:** (617) 629-6444 · **Fax:** (617) 629-6070
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Atrius Health, Inc. (NPI 1427271584, Cambridge, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Human Medicine, class of 1979
## Record status
- **NPPES last updated:** October 28, 2020
- **Other identifiers:** Other 39384 (MA); Other 680078 (MA); Other 0015209 (MA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1952374894) · Data from the CMS NPPES public registry.