Katherine Fernald, MS, RD, LDN
Katherine Fernald, MS, RD, LDN is a provider specialising in Nutrition Education Nutritionist in Natick, MA, registered under NPI 1285695809. This provider registers 3 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 67 UNION ST SUITE 107, Natick, MA 01760. 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 |
|---|---|---|
| 928 | MA | Nutrition Education Nutritionist primary |
| 928 | MA | Nutritionist |
| 928 | MA | Registered Dietitian |
This provider holds licence 928 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Registered Dietitian Or Nutrition Professional
- PAC ID
- 0244275030
Medicare enrolment is recorded as approved under the provider type Practitioner - Registered Dietitian Or Nutrition Professional. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Nutrition, Education covers
Definition to come... NUCC Health Care Provider Taxonomy, code 133NN1002X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 133NN1002X | Nutrition Education Nutritionist Nutrition, Education | 928 | MA | primary |
| 133N00000X | Nutritionist | 928 | MA | |
| 133V00000X | Registered Dietitian | 928 | MA |
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 | 1285695809 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 31, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MS, RD, LDN |
| Practice address |
67 UNION ST SUITE 107 Natick, MA 01760 (508) 655-8727 Fax (508) 655-1270 |
| Mailing address |
25 MAIN ST SUITE 7 Wayland, MA 01778 |
| Other identifiers |
3462578
· AETNA (MA) LD0048 · BLUE CROSS BLUE SHIELD (MA) 763558 · TUFTS (MA) AA23177 · HARVARD PILGRIM &VANGUARD (MA) |
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 | 2 | 8 | 5 | 6 | 9 | 5 | 8 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 7 | 5 | 3 | 9 | 1 | 8 | 0 |
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.