Four Rivers Anesthesia PC

Four Rivers Anesthesia PC is a healthcare organization registered as Certified Registered Nurse Anesthetist in Ontario, OR, holding Type 2 (organization) NPI 1801097407 since 2007. The authorized official on file is Michael Ohara, Owner.

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NPI	1801097407
Entity type	Organization (Type 2)
Legal business name	Four Rivers Anesthesia PC
Practice address	351 SW 9TH ST, Ontario, OR, 97914
Phone	5418895331
Enumeration date	2007-05-30
Last updated in NPPES	2010-11-01

Authorized official

Name	Michael Ohara
Title	Owner
Phone	2086429293

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
367500000X	Certified Registered Nurse Anesthetist	Primary	096007764CRNA	OR

Copy-ready billing details

Provider: Four Rivers Anesthesia PC
NPI: 1801097407
Taxonomy: 367500000X (Certified Registered Nurse Anesthetist)
Address: 351 SW 9TH ST, Ontario, OR, 97914

Providers at this address

NPI	Name	Type	Specialty	Location
1003870536	Brad Barlow	Individual	Emergency Medical Services (Emergency Medicine) Physician	Ontario, OR
1144284423	Aaron Gopp	Individual	Certified Registered Nurse Anesthetist	Ontario, OR
1215992003	Treasure Valley Anesthesia PC	Organization	Certified Registered Nurse Anesthetist	Ontario, OR
1265497655	Michael Ohara	Individual	Certified Registered Nurse Anesthetist	Ontario, OR
1023073426	Frederick Starr	Individual	Certified Registered Nurse Anesthetist	Ontario, OR
1811953854	Holy Rosary Medical Center	Organization	Internal Medicine Physician	Ontario, OR
1912964404	Jason Wilhelmsen	Individual	Emergency Medicine Physician	Ontario, OR
1043277536	Joseph Boyle	Individual	Emergency Medicine Physician	Ontario, OR

Verify this record

Cross-check NPI 1801097407 against the authoritative CMS record: view Four Rivers Anesthesia PC 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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2010-11-01. Verify at npiregistry.cms.hhs.gov.

Where is Four Rivers Anesthesia PC located?

The practice location on file with NPPES is in Ontario, OR.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2010-11-01.