Matthew Rulon Williams, M.D.
Pediatric Cardiology Physician · San Diego, CA
Matthew Rulon Williams, M.D. is a pediatric cardiology physician with a practice address in San Diego, California, and NPI 1831423250, issued on Oct 2, 2009. Check the license (California A109398, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew Rulon Williams
- Credential
- M.D.
- Primary taxonomy
- Pediatric Cardiology Physician 2080P0202X
- License number
- A109398 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3020 Childrens Way, San Diego, CA 92123
- Phone
- (858) 966-5855
- Enumerated
- Oct 2, 2009
- Record last updated
- May 3, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150817001053); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2008
- Entity
- Type 1 · individual
8 nearest pediatric cardiology physician records → All 363 in California → Look up another NPI →
Also registered at 3020 Childrens Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Blaine AbateMental Health Counselor1457684060
- Emily Abcede, ARNP, CPNPPediatric Nurse Practitioner1548654916
- Jason Adams, MD, PHDStudent in an Organized Health Care Education/Training Program1497507719
- Anneliese AdkinsOccupational Therapist1992904098
- Roxana Aghili, DOPediatrics Physician1851927883
- Natalie Aitchison, MDPsychiatry Physician1588876825
Verify Matthew Rulon Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109398Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $167.34
4 payments; by number, the most common kind was food and beverage; the largest payer was Biosense Webster, Inc. The 1,156 providers of this specialty with any payment received $2,864.57 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Rady Children's Hospital San DiegoSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Rulon Williams among 363 pediatric cardiology physician records in California
Matthew Rulon Williams, M.D. is one of 363 pediatric cardiology physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 36% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2008 · median 2004 among the 164 with a school on file
- Record last updated2017 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Cardiology Physician providers in California
There are 363 pediatric cardiology physician records in California.
All 363 in California → Every provider in San Diego → Pediatric Cardiology Physician nationwide →
The 8 pediatric cardiology physician records with the nearest ZIP codes
- Shriprasad Deshpande, M.B.,B.S.San Diego, CA 921231679781504
- Kirsten Dummer, M.D.San Diego, CA 921231780642280
- Howaida El-Said, M.D.San Diego, CA 921231619030194
- Brian Fagan, M.D.San Diego, CA 921231740308550
- Jeffrey Frazer, M.D.San Diego, CA 921231144378852
- Raymond Fripp, MDSan Diego, CA 921231225036627
- Juliana Gomez-Arostegui, MD, MPHSan Diego, CA 921231962439141
- Brent Gordon, MDSan Diego, CA 921231669480083
Common questions
What is Matthew Rulon Williams, M.D.'s NPI number?
Matthew Rulon Williams, M.D.'s National Provider Identifier (NPI) is 1831423250, issued on Oct 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Rulon Williams, M.D. located?
The NPPES record lists a practice address at 3020 Childrens Way, San Diego, CA, 92123. Phone: (858) 966-5855. Providers update this record themselves, so call before visiting.
How can I verify Matthew Rulon Williams, M.D.'s license?
NPPES lists California license number A109398, 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.