Carolyn Gaydos, RD, LDN
Carolyn Gaydos, RD, LDN is a Metabolic Nutrition Registered Dietitian in Philadelphia, PA, registered under NPI 1952344079. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 3998 RED LION RD NUTRITION CENTER, FRANKFORD HOSPITAL, Philadelphia, PA 19114. 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 |
|---|---|---|
| DN001781 | PA | Metabolic Nutrition Registered Dietitian primary |
| DN001781 | PA | Renal Nutrition Registered Dietitian |
This provider holds licence DN001781 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, Metabolic covers
A registered dietitian who achieves specialized competency in metabolic nutrition. NUCC Health Care Provider Taxonomy, code 133VN1006X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 133VN1006X | Metabolic Nutrition Registered Dietitian Nutrition, Metabolic | DN001781 | PA | primary |
| 133VN1005X | Renal Nutrition Registered Dietitian Nutrition, Renal | DN001781 | PA |
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 | 1952344079 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 14, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | RD, LDN |
| Practice address |
3998 RED LION RD NUTRITION CENTER, FRANKFORD HOSPITAL Philadelphia, PA 19114 (215) 612-4863 Fax (215) 612-5302 |
| Mailing address |
1970 NEW RODGERS RD APT L33 Levittown, PA 19056 |
| Other identifiers |
677119
· Other DN001781 · Other (PA) |
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 | 9 | 5 | 2 | 3 | 4 | 4 | 0 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 1 | 2 | 6 | 4 | 8 | 0 | 5 |
Sum = 61 · next multiple of 10 = 70 · 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.