Happells Pharmacy
Happells Pharmacy is a healthcare organization registered as Community/Retail Pharmacy in Stockton, CA, holding Type 2 (organization) NPI 1326183955 since 2007. The authorized official on file is Michael Castagno, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1326183955 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Happells Pharmacy |
| Practice address | 1530 WATERLOO RD, Stockton, CA, 95205 |
| Phone | 2094662522 |
| Enumeration date | 2007-02-21 |
| Last updated in NPPES | 2007-09-12 |
Authorized official
| Name | Michael Castagno |
|---|---|
| Title | Owner |
| Phone | 2094662522 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 333600000X | Pharmacy | Secondary | — | — |
| 3336C0003X | Community/Retail Pharmacy | Primary | PHY45684 | CA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0509440 | Other | — | OTHER ID NUMBER-COMMERCIAL NUMBER |
| PHA456840 | Medicaid | CA | — |
| 0509440 | Other | — | OTHER ID NUMBER |
Copy-ready billing details
Provider: Happells Pharmacy NPI: 1326183955 Taxonomy: 3336C0003X (Community/Retail Pharmacy) Address: 1530 WATERLOO RD, Stockton, CA, 95205
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1821095704 | Michael Castagno | Individual | Pharmacist | Stockton, CA |
Verify this record
Cross-check NPI 1326183955 against the authoritative CMS record: view Happells Pharmacy on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
What type of organization is Happells Pharmacy?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-09-12.