Maria Silvia Martinez-Wikefeldt, M.D.
Pediatrics Physician · Fountain Valley, CA
Maria Silvia Martinez-Wikefeldt, M.D. is a pediatrics physician with a practice address in Fountain Valley, California, and NPI 1164554846, issued on Mar 9, 2007. Check the license (California A77837, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maria Silvia Martinez-Wikefeldt
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A77837 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18785 Brookhurst St., Suite 200, Fountain Valley, CA 92708
- Phone
- (714) 378-5330
- Enumerated
- Mar 9, 2007
- Record last updated
- Jun 11, 2026
- Fax
- (657) 276-4743
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 18785 Brookhurst St., Suite 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Maria Silvia Martinez-Wikefeldt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77837Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Maria Silvia Martinez-Wikefeldt among 9,272 pediatrics physician records in California
Maria Silvia Martinez-Wikefeldt, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 43% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2026 · 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).
37 pediatrics physician records list a practice address in Fountain Valley
They are 37 of the 2,190 NPPES records with a practice address in Fountain Valley, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Fountain Valley → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Valery Brouwer, MDFountain Valley, CA 927081508895228
- Bradford Curtis, MDFountain Valley, CA 927081932190568
- Lori Debold, M.D.Fountain Valley, CA 927081831194323
- Bertram Dias, MDFountain Valley, CA 927081780613406
- Julie Fallon, MDFountain Valley, CA 927081891785234
- Richard Grainey, MDFountain Valley, CA 927081174570782
- Myduyen Nguyen, MDFountain Valley, CA 927081316939481
- Michael Ozaki, MDFountain Valley, CA 927081619958527
Common questions
What is Maria Silvia Martinez-Wikefeldt, M.D.'s NPI number?
Maria Silvia Martinez-Wikefeldt, M.D.'s National Provider Identifier (NPI) is 1164554846, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maria Silvia Martinez-Wikefeldt, M.D. located?
The NPPES record lists a practice address at 18785 Brookhurst St., Suite 200, Fountain Valley, CA, 92708. Phone: (714) 378-5330. Providers update this record themselves, so call before visiting.
How can I verify Maria Silvia Martinez-Wikefeldt, M.D.'s license?
NPPES lists California license number A77837, 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.
What is Maria Silvia Martinez-Wikefeldt, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.