Mr. David R O'Brien, PHARMD, RPH
Mr. David R O'Brien is a Ambulatory Care Pharmacist provider (Pharmacist) practicing in Hardin, MT, registered in the NPPES registry with NPI 1497407613 since 2022. The credential PHARMD stands for Doctor of Pharmacy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1497407613 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. David R O'Brien |
| Credential | PHARMD, RPH |
| Sex | Male |
| Practice address | Hardin, MT, 59034 |
| Phone | 4968674141 |
| Enumeration date | 2022-01-19 |
| Last updated in NPPES | 2022-01-19 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1835P2201X | Ambulatory Care Pharmacist | Primary | PHA-PHA-LIC-12476 | MT |
PHARMD — Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD credential
Copy-ready billing details
Provider: David O'Brien, PHARMD, RPH NPI: 1497407613 Taxonomy: 1835P2201X (Ambulatory Care Pharmacist) Address: Hardin, MT, 59034
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1053355727 | Robert Byron | Individual | Internal Medicine Physician | Hardin, MT |
| 1700963873 | Michael Tilus | Individual | Clinical Psychologist | Hardin, MT |
| 1538701339 | Ashley Vandewark | Individual | Ambulatory Care Pharmacist | Hardin, MT |
| 1952936254 | Rosalyn Bigback | Individual | Addiction (Substance Use Disorder) Counselor | Hardin, MT |
Verify this record
Cross-check NPI 1497407613 against the authoritative CMS record: view Mr. David R O'Brien 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 NPI 1497407613 active?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-01-19.