Mark Ludwig, LCSW
Clinical Social Worker · Berkeley, CA
Mark Ludwig, LCSW is a clinical social worker with a practice address in Berkeley, California, and NPI 1245511484, issued on Sep 1, 2011. Check the license (California 19530, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Ludwig
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 19530 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2246 6TH St, Berkeley, CA 94710
- Phone
- (510) 387-5845
- Enumerated
- Sep 1, 2011
- Record last updated
- Sep 1, 2011 (not updated in 15 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 36,261 in California → Look up another NPI →
Verify Mark Ludwig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 19530Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Ludwig among 36,261 clinical social worker records in California
Mark Ludwig, 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 not. Its NPI, issued in 2011, is newer than 34% of them.
- NPI issued2011 · 34% of these records are older, 62% newer
- In a Medicare fileNo · 6% of these records are
- In the CMS Doctors and Clinicians fileNo · 11% of these records are
- Record last updated2011 · 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).
287 clinical social worker records list a practice address in Berkeley
They are 287 of the 4,898 NPPES records with a practice address in Berkeley, and 36,261 clinical social worker records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 36,261 in California → Every provider in Berkeley → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Jessica Bigler Uhl, LCSWBerkeley, CA 947101912183864
- Jason Brand, LCSWBerkeley, CA 947101174773675
- Fay DillofBerkeley, CA 947101740419399
- Gillian Fynn, LCSWBerkeley, CA 947101588615272
- Benina Gould, LCSWBerkeley, CA 947101487735411
- Margaretta Mitchell, LCSWBerkeley, CA 947101225196231
- Jennifer Moll, LCSWBerkeley, CA 947101083882039
- Judith Nelson, PH.D.Berkeley, CA 947101336286178
Common questions
What is Mark Ludwig, LCSW's NPI number?
Mark Ludwig, LCSW's National Provider Identifier (NPI) is 1245511484, issued on Sep 1, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark Ludwig, LCSW located?
The NPPES record lists a practice address at 2246 6TH St, Berkeley, CA, 94710. Phone: (510) 387-5845. Providers update this record themselves, so call before visiting.
How can I verify Mark Ludwig, LCSW's license?
NPPES lists California license number 19530, 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. 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.