Margaret Simonds, RDN
Margaret Simonds, RDN is an Obesity and Weight Management Nutrition Registered Dietitian in Boston, MA, registered under NPI 1609687235.
Getting there
The practice address on file is 732 HARRISON AVE, Boston, MA 02118. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| LDN7079 | MA | Obesity and Weight Management Nutrition… primary |
This provider holds licence LDN7079 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Nutrition, Obesity and Weight Management covers
An individual who is a Board Certified Specialist for Obesity and Weight Management and educates, supports, and advocates for patients and clients to understand and manage their weight and associated risks through the use of nutritional, behavioral health, medical, surgical, pharmacotherapeutic, and exercise and physical activity interventions. NUCC Health Care Provider Taxonomy, code 133VN1201X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1609687235 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 14, 2025 |
| Last updated | Jan 14, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | RDN |
| Practice address |
732 HARRISON AVE Boston, MA 02118 (617) 638-7470 |
| Mailing address |
8 DUSTIN ST APT 101 Brighton, MA 02135 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 6 | 0 | 9 | 6 | 8 | 7 | 2 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 0 | 9 | 3 | 8 | 5 | 2 | 6 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.