Patrick S. O'Hollaren, MD
Pediatric Urology Physician · Portland, OR
Patrick S. O'Hollaren, MD is a pediatric urology physician with a practice address in Portland, Oregon, and NPI 1891782868, issued on Oct 4, 2005. Check the license (Oregon MD18712, as entered in NPPES) on the Oregon Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Patrick S. O'Hollaren
- Credential
- MD
- Primary taxonomy
- Pediatric Urology Physician 2088P0231X
- License number
- MD18712 OR
Self-reported in NPPES; status is on the state search - Practice location
- 9427 SW Barnes RD Ste 395, Portland, OR 97225
- Phone
- (503) 216-6050
- Enumerated
- Oct 4, 2005
- Record last updated
- Jan 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 64795 OR
8156036 WA
0034023 ID
MD8720R AK - Entity
- Type 1 · individual
Also registered at 9427 SW Barnes RD Ste 395
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeannie Chun, M.D.Pediatric Surgery Physician1639128499
- Nicole Dalton, PSYDClinical Psychologist1235642901
- Shanik Fernando, MDPediatric Otolaryngology Physician1538514179
- Colin Gause, MDPediatric Surgery Physician1801152509
- Madison Hossfeld, PNPPediatric Nurse Practitioner1710777412
- Victoria Jansen, RDRegistered Dietitian1154189173
Verify Patrick S. O'Hollaren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD18712Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Pediatric Urology Physician providers in Oregon
There are 10 pediatric urology physician records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other pediatric urology physician records in Oregon
- James Austin, MDPortland, OR1013918267
- Aaron Bayne, M.D.Clackamas, OR1578779492
- Julie Cheng, M.D.Portland, OR1891107710
- Sarah Hecht, M.D.Portland, OR1801239108
- Daniel Hirselj, M.D.Portland, OR1962603175
- David Lashley, MDPortland, OR1316972300
- Casey Seideman, MDPortland, OR1942439005
- Steven SkoogPortland, OR1104896786
- Richard Steinberg, M.D.Clackamas, OR1972686418
Common questions
What is Patrick S. O'Hollaren, MD's NPI number?
Patrick S. O'Hollaren, MD's National Provider Identifier (NPI) is 1891782868, issued on Oct 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Patrick S. O'Hollaren, MD located?
The NPPES record lists a practice address at 9427 SW Barnes RD Ste 395, Portland, OR, 97225. Phone: (503) 216-6050. Providers update this record themselves, so call before visiting.
How can I verify Patrick S. O'Hollaren, MD's license?
NPPES lists Oregon license number MD18712, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.