Sigrid Mergenthaler, LICSW
Clinical Social Worker · San Marcos, CA
Sigrid Mergenthaler, LICSW is a clinical social worker with a practice address in San Marcos, California, and NPI 1477759017, issued on Jun 21, 2007. Check the license (California LCSW123604, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sigrid Mergenthaler
- Credential
- LICSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- LCSW123604 CA
114737 MA
Self-reported in NPPES; status is on the state search - Practice location
- 150 Valpreda RD, San Marcos, CA 92069
- Phone
- (760) 736-6767
- Enumerated
- Jun 21, 2007
- Record last updated
- Aug 13, 2024
- Medicaid ID
- 1309161 MA
- Medicare enrollment
- Enrolled (PECOS I20241009004140); 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 150 Valpreda RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jannah Alaoui, CNM, RNAdvanced Practice Midwife1689908113
- Wais Alemi, MDFamily Medicine Physician1427305242
- Leon Altamirano, PSY.D.Psychologist1619271517
- Blanca Arias, LCSWClinical Social Worker1033223649
- Lynda Ariella, PHDClinical Psychologist1073518965
- Maria BanuelosCase Manager/Care Coordinator1720280589
Verify Sigrid Mergenthaler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license LCSW123604Check 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
- North County Health Project, Inc.San Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sigrid Mergenthaler among 36,261 clinical social worker records in California
Sigrid Mergenthaler, LICSW 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 2007, is newer than 9% of them.
- NPI issued2007 · 9% of these records are older, 76% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated1998 · median 2012 among the 4,008 with a school on file
- Record last updated2024 · 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).
71 clinical social worker records list a practice address in San Marcos
They are 71 of the 1,985 NPPES records with a practice address in San Marcos, and 36,261 clinical social worker records in California.
All 36,261 in California → Every provider in San Marcos → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Blanca Arias, LCSWSan Marcos, CA 920691033223649
- Traci Chester, LCSWSan Marcos, CA 920691316104656
- Rachel Dezember, LCSWSan Marcos, CA 920691649370826
- Walter Ferris, LCSWSan Marcos, CA 920691194765131
- Elaine Heffernan, LCSWSan Marcos, CA 920691750413860
- Rebeca Jimenez, LCSWSan Marcos, CA 920691568678779
- Julie Jones, LCSWSan Marcos, CA 920691922048255
- Katie Jorstad, LCSWSan Marcos, CA 920691912138587
Common questions
What is Sigrid Mergenthaler, LICSW's NPI number?
Sigrid Mergenthaler, LICSW's National Provider Identifier (NPI) is 1477759017, issued on Jun 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sigrid Mergenthaler, LICSW located?
The NPPES record lists a practice address at 150 Valpreda RD, San Marcos, CA, 92069. Phone: (760) 736-6767. Providers update this record themselves, so call before visiting.
How can I verify Sigrid Mergenthaler, LICSW's license?
NPPES lists California license number LCSW123604, 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.