Gary Sardina, RDN
NPI 1558171363 · Registered Dietitian · Castaic, CA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Sardina, RDN is a Registered Dietitian provider in Castaic, CA (NPI 1558171363).
Provider details
- NPI number
- 1558171363
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RDN
- Sex
- Male
- Sole proprietor
- Yes
- License
- 86069626 (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
1 yr 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
- 2025-01-13
- Last updated
- 2025-01-13
- Certified
- 2025-01-13
Frequently asked questions
- What is Gary Sardina's NPI number?
- Gary Sardina's National Provider Identifier (NPI) is 1558171363, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Sardina's specialty?
- Gary Sardina is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Gary Sardina located?
- Gary Sardina's practice location on file with NPPES is 27759 Wakefield Rd, Castaic, CA 91384-3520.
- What is Gary Sardina's phone number?
- The practice phone number listed in the NPPES registry for Gary Sardina is (858) 344-0515.
- Does Gary Sardina accept Medicare?
- Gary Sardina is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Sardina's NPI active?
- Yes — Gary Sardina's NPI (1558171363) is active in the NPPES registry as of the last update on 2025-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.