WILLIAM B. OLEY MD
NPI 1801994413
Family Medicine in Red Lodge, MT
About William B. Oley Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM B. OLEY MD (NPI 1801994413) is an individual family medicine provider in Red Lodge, Montana, licensed in Montana (10308) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Beartooth Billings Clinic, and is a graduate of Ohio State University College Of Medicine (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
William B. Oley 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
2Medicare enrollment records show William Oley reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Red Lodge, MT 59068
- Reassigned Medicare billing, Montana enrollment
- Also billed through NPI 1336119338 (Montana)
- 85 clinicians in this Medicare group
Homer, AK 99603
- Reassigned Medicare billing, Alaska enrollment
- 82 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beartooth Billings Clinic
Critical Access Hospitals · Red Lodge, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59068 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 William Oley's NPI number?
The NPI number for William Oley is 1801994413. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is William Oley located?
William Oley practices at 10 S Oakes, Red Lodge, MT 59068. The listed phone number is (406) 446-2412.
What is William Oley's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is William Oley enrolled in Medicare?
Yes. William Oley 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 William Oley's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Oley reassigns Medicare benefits to 2 organizations: Memorial Hospital Association (Red Lodge, MT) and South Peninsula Hospital, Inc (Homer, AK). 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 William Oley's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Oley accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list William Oley 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 William Oley affiliated with any hospitals?
According to CMS data, William Oley is affiliated with Beartooth Billings Clinic.
When was this NPI record last updated?
The NPPES record for William Oley was last updated on February 27, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# William B. Oley, MD · NPI 1801994413
Family Medicine physician in Red Lodge, Montana. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1801994413 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 10308 (Montana)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 S OAKES, Red Lodge, MT 59068
- **Phone:** (406) 446-2412
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Memorial Hospital Association (NPI 1184785099, Red Lodge, MT); South Peninsula Hospital, Inc (NPI 1093968372, Homer, AK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2000
## Record status
- **NPPES last updated:** February 27, 2008
- **Other identifiers:** Medicare UPIN H55631 (MT); Other 0062628 (MT); Medicare PIN 1153260005 (MT); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1801994413) · Data from the CMS NPPES public registry.