Sydney Sierras, RD
NPI 1669089744 · Registered Dietitian · Palo Alto, CA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sydney Sierras, RD is a Registered Dietitian provider in Palo Alto, CA (NPI 1669089744).
Provider details
- NPI number
- 1669089744
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RD
- Sex
- Female
- Sole proprietor
- No
- License
- 86131458 (CA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-09-23
- Last updated
- 2024-01-09
- Certified
- 2024-01-09
Frequently asked questions
- What is Sydney Sierras's NPI number?
- Sydney Sierras's National Provider Identifier (NPI) is 1669089744, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Sierras's specialty?
- Sydney Sierras is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Sydney Sierras located?
- Sydney Sierras's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Sydney Sierras's phone number?
- The practice phone number listed in the NPPES registry for Sydney Sierras is (650) 497-8000.
- Does Sydney Sierras accept Medicare?
- Sydney Sierras is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sydney Sierras's NPI active?
- Yes — Sydney Sierras's NPI (1669089744) is active in the NPPES registry as of the last update on 2024-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.