Steven John Kniffen, SUDRC LL, CMPSS
Addiction (Substance Use Disorder) Counselor · Long Beach, CA
Steven John Kniffen, SUDRC LL, CMPSS is an addiction (substance use disorder) counselor with a practice address in Long Beach, California, and NPI 1881562742, issued on Oct 23, 2025. Check the license (California R1594160125, 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
- Steven John Kniffen
- Credential
- SUDRC LL, CMPSS
- Primary taxonomy
- Addiction (Substance Use Disorder) Counselor 101YA0400X
- License numbers
- R1594160125 CA
MPSS-HSZTOD CA
Self-reported in NPPES; status is on the state search - Practice location
- 1401 E 4TH St, Long Beach, CA 90802
- Phone
- (562) 453-5157
- Enumerated
- Oct 23, 2025
- Record last updated
- Oct 23, 2025
- Entity
- Type 1 · individual
Also registered at 1401 E 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fengyi Tam, LCSWClinical Social Worker1780327981
- Megumi WashingtonPeer Specialist1235881764
Verify Steven John Kniffen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license R1594160125Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
624 addiction (substance use disorder) counselor records list a practice address in Long Beach
They are 624 of the 13,650 NPPES records with a practice address in Long Beach, and 27,741 addiction (substance use disorder) counselor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 624 in Long Beach → All 27,741 in California → Every provider in Long Beach →
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- Sean AbairTaft, CA1174084347
- Maira AbalosDelano, CA1508452038
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- Israel Abarca, CAADESan Francisco, CA1114126950
Common questions
What is Steven John Kniffen, SUDRC LL, CMPSS's NPI number?
Steven John Kniffen, SUDRC LL, CMPSS's National Provider Identifier (NPI) is 1881562742, issued on Oct 23, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Steven John Kniffen, SUDRC LL, CMPSS located?
The NPPES record lists a practice address at 1401 E 4TH St, Long Beach, CA, 90802. Phone: (562) 453-5157. Providers update this record themselves, so call before visiting.
How can I verify Steven John Kniffen, SUDRC LL, CMPSS's license?
NPPES lists California license number R1594160125, 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.