Karen Kay Alfonso, M.D.
NPI 1316228729 · Pediatrics Physician · Chino Hills, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Kay Alfonso, M.D. is a Pediatrics Physician provider in Chino Hills, CA (NPI 1316228729).
Provider details
- NPI number
- 1316228729
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A119750 (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
14 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
- 2011-08-30
- Last updated
- 2024-11-20
- Certified
- 2024-11-20
Frequently asked questions
- What is Karen Kay Alfonso's NPI number?
- Karen Kay Alfonso's National Provider Identifier (NPI) is 1316228729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Kay Alfonso's specialty?
- Karen Kay Alfonso is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Kay Alfonso located?
- Karen Kay Alfonso's practice location on file with NPPES is 15855 Pomona Rincon Rd, Chino Hills, CA 91709-5572.
- What is Karen Kay Alfonso's phone number?
- The practice phone number listed in the NPPES registry for Karen Kay Alfonso is (909) 929-2511.
- Does Karen Kay Alfonso accept Medicare?
- Karen Kay Alfonso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Kay Alfonso's NPI active?
- Yes — Karen Kay Alfonso's NPI (1316228729) is active in the NPPES registry as of the last update on 2024-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.