William Patrick Johnson Jr., RPH
William Patrick Johnson Jr. is a Pharmacotherapy Pharmacist provider (Pharmacist) practicing in O Fallon, IL, registered in the NPPES registry with NPI 1740647767 since 2016. The credential RPH stands for Registered Pharmacist.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1740647767 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William Patrick Johnson Jr. |
| Credential | RPH |
| Sex | Male |
| Practice address | O Fallon, IL, 62269 |
| Phone | 6186283140 |
| Enumeration date | 2016-01-21 |
| Last updated in NPPES | 2016-01-21 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1835P1200X | Pharmacotherapy Pharmacist | Primary | 18591 | IA |
RPH — Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential
Copy-ready billing details
Provider: William Johnson, RPH NPI: 1740647767 Taxonomy: 1835P1200X (Pharmacotherapy Pharmacist) Address: O Fallon, IL, 62269
Verify this record
Cross-check NPI 1740647767 against the authoritative CMS record: view William Patrick Johnson Jr. 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
Is this the official NPI registry?
What specialty is William Johnson?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-01-21.