Mr. Chester J Duchnowski Jr., RPH
Mr. Chester J Duchnowski Jr. is a Pharmacist provider (Pharmacist) practicing in Weldon Spring, MO, registered in the NPPES registry with NPI 1013290113 since 2011. The credential RPH stands for Registered Pharmacist. Practices at Walgreen Co (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1013290113 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Chester J Duchnowski Jr. |
| Credential | RPH |
| Sex | Male |
| Practice address | 1003 WOLFRUM RD, Weldon Spring, MO, 63304 |
| Phone | 6363000158 |
| Enumeration date | 2011-09-25 |
| Last updated in NPPES | 2011-09-25 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 183500000X | Pharmacist | Primary | 040147 | MO |
RPH — Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential
Copy-ready billing details
Provider: Chester Duchnowski, RPH NPI: 1013290113 Taxonomy: 183500000X (Pharmacist) Address: 1003 WOLFRUM RD, Weldon Spring, MO, 63304
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1700893716 | Walgreen Co | Organization | Pharmacy | Weldon Spring, MO |
| 1770866774 | Laurie Henke | Individual | Pharmacist | Weldon Spring, MO |
| 1427495225 | Wendy Mccoy | Individual | Pharmacist | Weldon Spring, MO |
| 1821609587 | Mackenzie Watkins | Individual | Pharmacist | Weldon Spring, MO |
| 1023620085 | Brittany Taake | Individual | Pharmacist | Weldon Spring, MO |
| 1730792235 | Abbey Westermann | Individual | Pharmacist | Weldon Spring, MO |
| 1104593938 | Thien Long Vu | Individual | Pharmacist | Weldon Spring, MO |
Verify this record
Cross-check NPI 1013290113 against the authoritative CMS record: view Mr. Chester J Duchnowski 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.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2011-09-25.