Roberta Ritter Spier, RDN
NPI 1871085449 · Registered Dietitian · Palo Alto, CA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roberta Ritter Spier, RDN is a Registered Dietitian provider in Palo Alto, CA (NPI 1871085449).
Provider details
- NPI number
- 1871085449
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RDN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 86066331 (CA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
71 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure for Nutrition Management, Each 15 Minutes97802 | 45 | $38 |
| Diabetes Outpatient Self-Management Training Services, Individual, Per 30 MinutesG0108 | 26 | $62 |
Typical Medicare-allowed amounts for these services range $38–$62 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 301 Industrial RdSan Carlos, CA 94070-2603Phone: (408) 800-8841
Registry dates
- Enumerated
- 2018-05-30
- Last updated
- 2020-06-12
- Certified
- 2020-06-12
Frequently asked questions
- What is Roberta Ritter Spier's NPI number?
- Roberta Ritter Spier's National Provider Identifier (NPI) is 1871085449, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roberta Ritter Spier's specialty?
- Roberta Ritter Spier is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Roberta Ritter Spier located?
- Roberta Ritter Spier's practice location on file with NPPES is 795 El Camino Real, Palo Alto, CA 94301-2302.
- What is Roberta Ritter Spier's phone number?
- The practice phone number listed in the NPPES registry for Roberta Ritter Spier is (650) 853-2961.
- Does Roberta Ritter Spier accept Medicare?
- Roberta Ritter Spier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roberta Ritter Spier's NPI active?
- Yes — Roberta Ritter Spier's NPI (1871085449) is active in the NPPES registry as of the last update on 2020-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.