JOHN D OHOLLERAN MD
NPI 1912007220
Surgery in Oregon City, OR
About John D Oholleran Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN D OHOLLERAN MD (NPI 1912007220) is an individual surgery provider in Oregon City, Oregon, licensed in Oregon (MD215189) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Providence Willamette Falls Medical Center, and is a graduate of University Of Nebraska College Of Medicine (1987).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John D Oholleran Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show John Oholleran reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oregon City, OR 97045
- Reassigned Medicare billing, Oregon enrollment
- 1,501 clinicians in this Medicare group
Oregon City, OR 97045
- Reassigned Medicare billing, Oregon enrollment
- 206 clinicians in this Medicare group
Milwaukie, OR 97222
- Reassigned Medicare billing, Oregon enrollment
- 229 clinicians in this Medicare group
San Carlos, CA 94070
- Reassigned Medicare billing, California enrollment
- 393 clinicians in this Medicare group
Kingsley, IA 51028
- Reassigned Medicare billing, Iowa enrollment
- 1,506 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Providence Willamette Falls Medical Center
Acute Care Hospitals · Oregon City, ORProvidence Milwaukie Hospital
Acute Care Hospitals · Milwaukie, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97045 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OREGON CITY, OR 97045
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Oholleran's NPI number?
The NPI number for John Oholleran is 1912007220. It was assigned to this individual provider in the NPPES registry on September 25, 2006.
Where is John Oholleran located?
John Oholleran practices at 1510 Division St Ste 210, Oregon City, OR 97045. The listed phone number is (503) 723-6525.
What is John Oholleran's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is John Oholleran enrolled in Medicare?
Yes. John Oholleran is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Oholleran's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Oholleran reassigns Medicare benefits to 5 organizations: Providence Health & Services - Oregon (Oregon City, OR), Providence Health & Services - Oregon (Oregon City, OR), Providence Health & Services Oregon (Milwaukie, OR), Sutter Bay Medical Foundation (San Carlos, CA) and Iowa Physicians Clinic Medical Foundation (Kingsley, IA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Oholleran's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Oholleran accept?
Health plans from Providence Health Plan list John Oholleran as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Oholleran affiliated with any hospitals?
According to CMS data, John Oholleran is affiliated with Providence Willamette Falls Medical Center and Providence Milwaukie Hospital.
When was this NPI record last updated?
The NPPES record for John Oholleran was last updated on February 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John D Oholleran, MD · NPI 1912007220
Surgery physician in Oregon City, Oregon. Individual provider, active in the CMS NPPES registry since September 25, 2006.
## Identity
- **NPI:** 1912007220 (Entity type: Individual)
- **Enumerated:** September 25, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** MD215189 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 1510 DIVISION ST STE 210, Oregon City, OR 97045-1599
- **Phone:** (503) 723-6525
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services - Oregon (NPI 1346533585, Oregon City, OR); Providence Health & Services - Oregon (NPI 1003368911, Oregon City, OR); Providence Health & Services Oregon (NPI 1366536963, Milwaukie, OR); Sutter Bay Medical Foundation (NPI 1164840088, San Carlos, CA); Iowa Physicians Clinic Medical Foundation (NPI 1659263523, Kingsley, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Nebraska College Of Medicine, class of 1987
## Record status
- **NPPES last updated:** February 2, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1912007220) · Data from the CMS NPPES public registry.