Karen Kay Gragasin Alfonso, M.D.
Pediatrics Physician · Chino Hills, CA
Karen Kay Gragasin Alfonso, M.D. is a pediatrics physician with a practice address in Chino Hills, California, and NPI 1316228729, issued on Aug 30, 2011. Check the license (California A119750, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Kay Gragasin Alfonso
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A119750 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15855 Pomona Rincon RD, Chino Hills, CA 91709
- Phone
- (909) 929-2511
- Enumerated
- Aug 30, 2011
- Record last updated
- Nov 20, 2024
- Medicare enrollment
- Enrolled (PECOS I20130709000183); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 15855 Pomona Rincon RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Pamela Higa, MDObstetrics & Gynecology Physician1922536721
- Carrie Johnson, LMFTMarriage & Family Therapist1649954983
- Matthew Murayama, DOFamily Medicine Physician1700463635
- Lisa Park, FNP-CFamily Nurse Practitioner1447866132
Verify Karen Kay Gragasin Alfonso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A119750Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Providence Medical FoundationChino Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Kay Gragasin Alfonso among 9,272 pediatrics physician records in California
Karen Kay Gragasin Alfonso, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2013 · median 2012 among the 754 with a school on file
- Record last updated2024 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 pediatrics physician records list a practice address in Chino Hills
They are 11 of the 774 NPPES records with a practice address in Chino Hills, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Chino Hills → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Hua Bai, M.D.Chino Hills, CA 917091295756336
- Caroline Bebawy, MDChino Hills, CA 917091336878834
- Joel De La Merced, M.D.Chino Hills, CA 917091306810031
- Terrence Liu, M.D.Chino Hills, CA 917091285619825
- Yen-Fu Liu, M.D.Chino Hills, CA 917091598982522
- Anh Nguyen, M.D.Chino Hills, CA 917091720205768
- Falgooni Patel, DOChino Hills, CA 917091457659369
- Jessica Paxson, M.D.Chino Hills, CA 917091992772529
Common questions
What is Karen Kay Gragasin Alfonso, M.D.'s NPI number?
Karen Kay Gragasin Alfonso, M.D.'s National Provider Identifier (NPI) is 1316228729, issued on Aug 30, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Karen Kay Gragasin Alfonso, M.D. located?
The NPPES record lists a practice address at 15855 Pomona Rincon RD, Chino Hills, CA, 91709. Phone: (909) 929-2511. Providers update this record themselves, so call before visiting.
How can I verify Karen Kay Gragasin Alfonso, M.D.'s license?
NPPES lists California license number A119750, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.