Matthew Chapin
Addiction (Substance Use Disorder) Counselor · San Pedro, CA
Matthew Chapin is an addiction (substance use disorder) counselor with a practice address in San Pedro, California, and NPI 1598447682, issued on Aug 7, 2023. Check the license (California R1515790723, 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 Chapin
- Primary taxonomy
- Addiction (Substance Use Disorder) Counselor 101YA0400X
- License number
- R1515790723 CA
Self-reported in NPPES; status is on the state search - Practice location
- 270 W 14TH St, San Pedro, CA 90731
- Phone
- (310) 832-1218
- Enumerated
- Aug 7, 2023
- Entity
- Type 1 · individual
Also registered at 270 W 14TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stephen Duffy, RADT-IAddiction (Substance Use Disorder) Counselor1932690344
Verify Matthew Chapin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license R1515790723Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
190 addiction (substance use disorder) counselor records list a San Pedro practice address
They are 190 of the 1,072 NPPES records with a San Pedro practice address, and 29,099 addiction (substance use disorder) counselor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 190 in San Pedro → All 29,099 in California → Every provider in San Pedro →
Other addiction (substance use disorder) counselor records in California
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- Emory Aaron, CCAPP C4321214Los Angeles, CA1073980801
- Lisa Aaron, CASACCulver City, CA1356090849
- Michael Abacherli, JD, RADTSan Jacinto, CA1235826983
- Victor AbadEl Cajon, CA1205562238
- Sean AbairTaft, CA1174084347
- Maira AbalosDelano, CA1508452038
- Jazmine AbanicoVentura, CA1851964613
- Israel Abarca, CAADESan Francisco, CA1114126950
Common questions
What is Matthew Chapin's NPI number?
Matthew Chapin's National Provider Identifier (NPI) is 1598447682, issued on Aug 7, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Chapin located?
The NPPES record lists a practice address at 270 W 14TH St, San Pedro, CA, 90731. Phone: (310) 832-1218. Providers update this record themselves, so call before visiting.
How can I verify Matthew Chapin's license?
NPPES lists California license number R1515790723, 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.