Matthew Day, L.C.S.W.
Clinical Social Worker · Oakland, CA
Matthew Day, L.C.S.W. is a clinical social worker with a practice address in Oakland, California, and NPI 1235345869, issued on May 14, 2007. Check the license (California 23642, 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
- Matthew Day
- Credential
- L.C.S.W.
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 23642 CA
Self-reported in NPPES; status is on the state search - Practice location
- 616 16TH St, Oakland, CA 94612
- Phone
- (510) 451-4270
- Enumerated
- May 14, 2007
- Record last updated
- Jul 16, 2007 (not updated in 19 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 →
Also registered at 616 16TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Romaine Bennett, ARNPNurse Practitioner1982020830
- Joann Bianchi Wojick, LCSWClinical Social Worker1700073285
- Maria Culcasi, LCSWClinical Social Worker1023060662
- Susan Ferguson, MDAddiction Medicine (Internal Medicine) Physician1093756678
- Kirsten FlaggFamily Nurse Practitioner1134537244
- Douglas Frey, MSN, NP-C, FNPFamily Nurse Practitioner1467711572
Verify Matthew Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 23642Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Matthew Day among 36,261 clinical social worker records in California
Matthew Day, L.C.S.W. 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 2007, is newer than 9% of them.
- NPI issued2007 · 9% of these records are older, 76% newer
- In a Medicare fileNo · 6% of these records are
- In the CMS Doctors and Clinicians fileNo · 11% of these records are
- Record last updated2007 · 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).
1,130 clinical social worker records list a practice address in Oakland
They are 1,130 of the 18,558 NPPES records with a practice address in Oakland, 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 Oakland → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Omar Bocobo, LCSWOakland, CA 946121124069802
- Jill Caplan, MSWOakland, CA 946121932246535
- Maria Culcasi, LCSWOakland, CA 946121023060662
- Amber MayfieldOakland, CA 946121679618086
- Marea Murray, MSW, LCSWOakland, CA 946121205855681
- Donna Pedroza, LCSWOakland, CA 946121487605028
- Richard Pinard, LCSW-ROakland, CA 946121679524177
- Alma Prins, MSW, LCSWOakland, CA 946121336113257
Common questions
What is Matthew Day, L.C.S.W.'s NPI number?
Matthew Day, L.C.S.W.'s National Provider Identifier (NPI) is 1235345869, issued on May 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Day, L.C.S.W. located?
The NPPES record lists a practice address at 616 16TH St, Oakland, CA, 94612. Phone: (510) 451-4270. Providers update this record themselves, so call before visiting.
How can I verify Matthew Day, L.C.S.W.'s license?
NPPES lists California license number 23642, 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.