Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick S O'Hollaren, MD

Pediatric Urology Physician in Portland, OR · enumerated 2005 · practices at Providence Health & Services - Oregon.

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

National Provider Identifier

1891782868

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Patrick S O'Hollaren

Credential MD

Sex Male

Practice address 9427 Sw Barnes Rd Ste 395, Portland, OR, 97225

Phone (503) 216-6050

Enumeration date Oct 4, 2005

Last updated in NPPES Jan 19, 2021

Taxonomy & licenses

2088P0231X Pediatric Urology Physician Allopathic & Osteopathic Physicians · License MD18712 (OR) Primary

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
64795	Medicaid	OR	-
8156036	Medicaid	WA	-
A016	Other	-	TRICARE
003395010	Other	-	BLUE CROSS
0034023	Medicaid	ID	-
0565A	Other	-	HEALTHNET
MD8720R	Medicaid	AK	-
930766376	Other	-	CAREOREGON
8156036	Other	-	COLUMBIA UNITED PF
F81042	Other	-	PROVIDENCE HEALTH

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

How do I verify Patrick O'Hollaren's NPI record?

Cross-check NPI 1891782868 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891782868 active?

Yes, as of the latest NPPES snapshot, NPI 1891782868 is active (record last updated 2021-01-19).

Other providers at this practice address

Browse all →

Jeannie Chun Pediatric Surgery Physician · Portland, OR NPI 1639128499 Gillian Rosicky Family Nurse Practitioner · Portland, OR NPI 1295789428 Peggy Kelley Pediatric Otolaryngology Physician · Portland, OR NPI 1689777476 Kenneth Pippus Pediatric Surgery Physician · Portland, OR NPI 1801982764 Angela Elaine Lennon Pediatric Endocrinology Physician · Portland, OR NPI 1245430933 Providence Health & Services - Oregon Neurology with Special Qualifications in Child Neurology Physician · Portland, OR NPI 1316125149 Amy Tsai Pediatric Gastroenterology Physician · Portland, OR NPI 1588831713 Leah Peterson Advanced Practice Midwife · Portland, OR NPI 1770866634

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-19.