DR. NATHAN A BAY MD
NPI 1982647855
Anesthesiology in Portland, OR
About Dr. Nathan A Bay Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHAN A BAY MD (NPI 1982647855) is an individual anesthesiology provider in Portland, Oregon, licensed in Oregon (MD26592) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Chicago College Of Medicine And Surgery (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Dr. Nathan A Bay 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 Reassignment
Medicare enrollment records show Nathan Bay reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Portland, OR 97209
- Reassigned Medicare billing, Oregon and Washington enrollments
- Also billed through NPI 1184786527 (Washington)
- 3,207 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Nathan Bay's NPI number?
The NPI number for Nathan Bay is 1982647855. It was assigned to this individual provider in the NPPES registry on June 14, 2006.
Where is Nathan Bay located?
Nathan Bay practices at 707 SW Washington St Ste 700, Portland, OR 97205. The listed phone number is (503) 299-9906.
What is Nathan Bay's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Nathan Bay enrolled in Medicare?
Yes. Nathan Bay 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 organization bills Medicare for Nathan Bay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Bay reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Northwest (Portland, OR). The 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 Nathan Bay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Nathan Bay was last updated on September 9, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Nathan A Bay, MD · NPI 1982647855
Anesthesiology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since June 14, 2006.
## Identity
- **NPI:** 1982647855 (Entity type: Individual)
- **Enumerated:** June 14, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** MD26592 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 707 SW WASHINGTON ST, STE 700, Portland, OR 97205-3536
- **Phone:** (503) 299-9906 · **Fax:** (503) 225-9002
## 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:** Kaiser Foundation Health Plan Of The Northwest (NPI 1649722034, Portland, OR), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Chicago College Of Medicine And Surgery, class of 2002
## Record status
- **NPPES last updated:** September 9, 2013
- **Other identifiers:** Medicaid 8457731 (WA); Medicare UPIN I54903; Medicare PIN 134820 (OR); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1982647855) · Data from the CMS NPPES public registry.