Oi Yi Tin-Mejia, MBA, MS, RD
NPI 1306249958 · Registered Dietitian · Monterey Park, CA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oi Yi Tin-Mejia, MBA, MS, RD is a Registered Dietitian provider in Monterey Park, CA (NPI 1306249958).
Provider details
- NPI number
- 1306249958
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- MBA, MS, RD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 1078313 (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
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 525 N Garfield AveMonterey Park, CA 91754-1202Phone: (626) 307-2041
Registry dates
- Enumerated
- 2014-09-26
- Last updated
- 2022-03-31
- Certified
- 2022-03-31
Frequently asked questions
- What is Oi Yi Tin-Mejia's NPI number?
- Oi Yi Tin-Mejia's National Provider Identifier (NPI) is 1306249958, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oi Yi Tin-Mejia's specialty?
- Oi Yi Tin-Mejia is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Oi Yi Tin-Mejia located?
- Oi Yi Tin-Mejia's practice location on file with NPPES is 224 E Hammel St, Monterey Park, CA 91755-7212.
- What is Oi Yi Tin-Mejia's phone number?
- The practice phone number listed in the NPPES registry for Oi Yi Tin-Mejia is (626) 319-8883.
- Does Oi Yi Tin-Mejia accept Medicare?
- Oi Yi Tin-Mejia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oi Yi Tin-Mejia's NPI active?
- Yes — Oi Yi Tin-Mejia's NPI (1306249958) is active in the NPPES registry as of the last update on 2022-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.