NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jason Douglas Tewell, PHARMD

Pharmacist in Los Osos, CA · enumerated 2008 · practices at Ascencion Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1346494317

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Jason Douglas Tewell
Credential PHARMD
Sex Male
Practice address 989 Los Osos Valley Rd, Los Osos, CA, 93402
Phone (805) 528-1017
Fax (805) 528-1915
Enumeration date Nov 4, 2008
Last updated in NPPES Nov 4, 2008

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 60415 (CA) Primary
PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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.

Read the full guide → Validate an NPI →

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 Jason Tewell?
Jason Tewell is registered in NPPES with the primary taxonomy of Pharmacist. 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 2008-11-04.