Marcia Pegues Ewing, LCSW
Clinical Social Worker · San Mateo, CA
Marcia Pegues Ewing, LCSW is a clinical social worker with a practice address in San Mateo, California, and NPI 1629789888, issued on Dec 8, 2022. Check the license (California LCSW94246, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marcia Pegues Ewing
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- LCSW94246 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1950 Alameda DE Las Pulgas, San Mateo, CA 94403
- Phone
- (650) 573-2541
- Enumerated
- Dec 8, 2022
- Record last updated
- Mar 18, 2025
- Medicare enrollment
- Enrolled (PECOS I20240530002424); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 36,261 in California → Look up another NPI →
Also registered at 1950 Alameda DE Las Pulgas
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marcia Pegues Ewing in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license LCSW94246Check 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
- County OF San MateoSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcia Pegues Ewing among 36,261 clinical social worker records in California
Marcia Pegues Ewing, LCSW is one of 36,261 clinical social worker records with a practice address in California. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 81% of them.
- NPI issued2022 · 81% of these records are older, 14% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated2014 · median 2012 among the 4,008 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
140 clinical social worker records list a practice address in San Mateo
They are 140 of the 3,909 NPPES records with a practice address in San Mateo, and 36,261 clinical social worker records in California.
All 36,261 in California → Every provider in San Mateo → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Cecilia Barberena, LCSWSan Mateo, CA 944031629133129
- Bonnie Charton, PSWSan Mateo, CA 944031457482978
- Shirley ChuSan Mateo, CA 944031104927151
- Luis Ciprez, LCSWSan Mateo, CA 944031104957661
- Zachary Comtois, MSWSan Mateo, CA 944031477695120
- Diane DworkinSan Mateo, CA 944031093846230
- Lynda FrattaroliSan Mateo, CA 944031649304007
- Shelley Hesler, LCSWSan Mateo, CA 944031124143250
Common questions
What is Marcia Pegues Ewing, LCSW's NPI number?
Marcia Pegues Ewing, LCSW's National Provider Identifier (NPI) is 1629789888, issued on Dec 8, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Marcia Pegues Ewing, LCSW located?
The NPPES record lists a practice address at 1950 Alameda DE Las Pulgas, San Mateo, CA, 94403. Phone: (650) 573-2541. Providers update this record themselves, so call before visiting.
How can I verify Marcia Pegues Ewing, LCSW's license?
NPPES lists California license number LCSW94246, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
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.