Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

On-Site Anesthesia Services Inc

Certified Registered Nurse Anesthetist in Lake Oswego, OR · enumerated 2006 · authorized official Grant Diggles, Ceo.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1669417176

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name On-Site Anesthesia Services Inc

Other name <Unavail>

Practice address 333 S State St # V111, Lake Oswego, OR, 97034

Phone (503) 548-4770

Fax (503) 655-3318

Enumeration date Jun 18, 2006

Last updated in NPPES Oct 9, 2024

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name Grant Diggles

Title Ceo

Phone (503) 548-4770

Other identifiers

Identifier	Type	State	Issuer
286978	Medicaid	OR	-

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 → Validate an NPI →

Frequently asked questions

Where is On-Site Anesthesia Services Inc located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-10-09. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-09.