Rebecca Porthouse, R.D.
Rebecca Porthouse, R.D. is a Registered Dietitian in Sunnyvale, CA, registered under NPI 1003077603. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Sunnyvale, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 230 ft away. There is EV charging 0.44 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 592 ft away, served by Fair Oaks & Evelyn. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Parking 201 ft ~1 min
Parking 205 ft ~1 min
Parking 230 ft ~1 min
Transit East Evelyn Avenue & Deodar Way 335 ft ~2 min
Transit East Evelyn Avenue & South Fair Oaks Avenue 557 ft ~3 min
Transit Fair Oaks & Evelyn 592 ft ~3 min
Restaurant King Wah Chinese 0.39 mi ~8 min
Hotel Aloft Sunnyvale 0.41 mi ~9 min
Restaurant Daily Donuts 0.41 mi ~9 min
110 South Sunnyvale Avenue, Sunnyvale 94086
Restaurant Hunan House 0.42 mi ~9 min
EV charging 0.44 mi ~9 min
Gas station Fair Oaks Gas 0.47 mi ~10 min
Coffee The Bean Scene Cafe 0.48 mi ~10 min
186 South Murphy Avenue
Coffee Coffee-n-More 0.48 mi ~10 min
100 South Murphy Avenue, Sunnyvale 94086
Mo-Fr 08:00-16:00; Sa 08:00-17:00
Convenience Fair Oaks Gas 0.48 mi ~10 min
603 Old San Francisco Road, Sunnyvale 94086
Convenience 7-Eleven 0.48 mi ~10 min
615 Old San Francisco Road, Sunnyvale 94086
24/7
Coffee Alma Dessert 0.49 mi ~10 min
165d South Murphy Avenue
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 01020916 | CA | Registered Dietitian primary |
This provider holds licence 01020916 issued in CA. 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 Dietitian, Registered covers
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation. NUCC Health Care Provider Taxonomy, code 133V00000X
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 | 1003077603 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 17, 2008 |
| Last updated | Jun 17, 2008 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | R.D. |
| Practice address |
555 E WASHINGTON AVE APT 1106 Sunnyvale, CA 94086 (408) 326-9403 |
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 | 0 | 0 | 3 | 0 | 7 | 7 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 7 | 5 | 6 | 0 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.