Mary Weiss
Mary Weiss is a Pediatric Critical Care Nutrition Registered Dietitian in Philadelphia, PA, registered under NPI 1184553059. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 943 WASHINGTON AVE APT 404, Philadelphia, PA 19147. 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 |
|---|---|---|
| DN007897 | PA | Pediatric Critical Care Nutrition… primary |
This provider holds licence DN007897 issued in PA. 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, Pediatric Critical Care covers
An individual who is a Board Certified Specialist in Pediatric Critical Care Nutrition and applies evidence-based nutrition knowledge in providing medical nutrition therapy for critically ill infants, children and adolescents. Additional roles could include coordination, education, quality improvement, or research linked specifically to pediatric critical care nutrition. NUCC Health Care Provider Taxonomy, code 133VN1401X
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 | 1184553059 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 18, 2026 |
| Last updated | May 18, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
943 WASHINGTON AVE APT 404 Philadelphia, PA 19147 (856) 701-4198 |
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 | 1 | 8 | 4 | 5 | 5 | 3 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 7 | 4 | 1 | 5 | 6 | 0 | 1 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.