Patrick D Obrien, MD
Patrick D Obrien is a Cardiovascular Disease Physician provider (Internal Medicine) practicing in Appleton, WI, registered in the NPPES registry with NPI 1265427496 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1265427496 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Patrick D Obrien |
| Credential | MD |
| Sex | Male |
| Practice address | 1506 S ONEIDA ST, Appleton, WI, 54915 |
| Phone | 9207306700 |
| Enumeration date | 2005-09-14 |
| Last updated in NPPES | 2010-02-23 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207RC0000X | Cardiovascular Disease Physician | Primary | 27747 | WI |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 31421200 | Medicaid | WI | — |
Copy-ready billing details
Provider: Patrick Obrien, MD NPI: 1265427496 Taxonomy: 207RC0000X (Cardiovascular Disease Physician) Address: 1506 S ONEIDA ST, Appleton, WI, 54915
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1871419234 | Erika Leichtnam | Individual | Pharmacist | Appleton, WI |
| 1821914169 | Morgan Blaha | Individual | Speech-Language Pathologist | Appleton, WI |
| 1114844230 | Zoey Zoromski | Individual | Pharmacist | Appleton, WI |
| 1639163652 | Michael Arizola | Individual | Physician Assistant | Appleton, WI |
| 1548254568 | Bryan Avery | Individual | Pulmonary Disease Physician | Appleton, WI |
| 1356335350 | Kenneth Geller | Individual | Cardiovascular Disease Physician | Appleton, WI |
| 1699769695 | Zenoun Abouzelam | Individual | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician | Appleton, WI |
| 1104810118 | John Almquist | Individual | Hospitalist Physician | Appleton, WI |
Verify this record
Cross-check NPI 1265427496 against the authoritative CMS record: view Patrick D Obrien 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2010-02-23.