Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Karl Thomas Knobler, PHD
Psychologist in Berkeley, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477646545
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Karl Thomas Knobler
Credential PHD
Sex Male
Practice address 2046 Lincoln St, Suite #1, Berkeley, CA, 94709
Phone (510) 949-0945
Fax (510) 528-3539
Enumeration date Oct 2, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Karl Knobler?
Karl Knobler is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.