Decerie Dayag, MD
NPI 1336660901 · Internal Medicine Physician · Upland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Decerie Dayag, MD is a Internal Medicine Physician provider in Upland, CA (NPI 1336660901).
Provider details
- NPI number
- 1336660901
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A169662 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 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
- 2017-07-04
- Last updated
- 2025-12-18
- Certified
- 2025-12-18
Frequently asked questions
- What is Decerie Dayag's NPI number?
- Decerie Dayag's National Provider Identifier (NPI) is 1336660901, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Decerie Dayag's specialty?
- Decerie Dayag is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Decerie Dayag located?
- Decerie Dayag's practice location on file with NPPES is 811 E 11th St Ste 208, Upland, CA 91786-4872.
- What is Decerie Dayag's phone number?
- The practice phone number listed in the NPPES registry for Decerie Dayag is (909) 985-0883.
- Does Decerie Dayag accept Medicare?
- Decerie Dayag is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Decerie Dayag's NPI active?
- Yes — Decerie Dayag's NPI (1336660901) is active in the NPPES registry as of the last update on 2025-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.