Margaret Ullmann-Weil, RD
NPI 1952374894 · Registered Dietitian · Cambridge, MA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Ullmann-Weil, RD is a Registered Dietitian provider in Cambridge, MA (NPI 1952374894).
Provider details
- NPI number
- 1952374894
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RD
- Sex
- Female
- Sole proprietor
- No
- License
- 832 (MA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
176 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure Reassessment for Nutrition Management, Each 15 Minutes97803 | 114 | $29 |
| Therapy Procedure for Nutrition Management, Each 15 Minutes97802 | 62 | $34 |
Typical Medicare-allowed amounts for these services range $29–$34 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-10
- Last updated
- 2020-10-28
- Certified
- 2020-10-28
Frequently asked questions
- What is Margaret Ullmann-Weil's NPI number?
- Margaret Ullmann-Weil's National Provider Identifier (NPI) is 1952374894, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Ullmann-Weil's specialty?
- Margaret Ullmann-Weil is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Margaret Ullmann-Weil located?
- Margaret Ullmann-Weil's practice location on file with NPPES is 1611 Cambridge St, Cambridge, MA 02138-4302.
- What is Margaret Ullmann-Weil's phone number?
- The practice phone number listed in the NPPES registry for Margaret Ullmann-Weil is (617) 629-6444.
- Does Margaret Ullmann-Weil accept Medicare?
- Margaret Ullmann-Weil is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Ullmann-Weil's NPI active?
- Yes — Margaret Ullmann-Weil's NPI (1952374894) is active in the NPPES registry as of the last update on 2020-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.