TAMMY MAI D.O.
NPI 1275821902
Anesthesiology in Portland, OR
About Tammy Mai D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY MAI D.O. (NPI 1275821902) is an individual anesthesiology provider in Portland, Oregon, licensed in Oregon (DO173813) and active in the NPI registry since July 2011. She is enrolled in Medicare PECOS, is affiliated with Good Samaritan Regional Medical Center, and maintains a secondary practice location in Corvallis.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Tammy Mai D.o. 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
6Medicare enrollment records show Tammy Mai reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97205
- Reassigned Medicare billing, Oregon enrollment
- 271 clinicians in this Medicare group
Vancouver, WA 98664
- Reassigned Medicare billing, Oregon and Washington enrollments
- 108 clinicians in this Medicare group
Woodburn, OR 97071
- Reassigned Medicare billing, Oregon enrollment
- 625 clinicians in this Medicare group
Albany, OR 97321
- Reassigned Medicare billing, Oregon enrollment
- 522 clinicians in this Medicare group
Richland, WA 99352
- Reassigned Medicare billing, Washington enrollment
- 172 clinicians in this Medicare group
Everett, WA 98201
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Providence Wa Anesthesia Services, PC
- 171 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 5
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Good Samaritan Regional Medical Center
Acute Care Hospitals · Corvallis, ORLegacy Good Samaritan Medical Center
Acute Care Hospitals · Portland, ORSalem Hospital
Acute Care Hospitals · Salem, OROther 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 Tammy Mai's NPI number?
The NPI number for Tammy Mai is 1275821902. It was assigned to this individual provider in the NPPES registry on July 15, 2011.
Where is Tammy Mai located?
Tammy Mai practices at 707 SW Washington St Suite 700, Portland, OR 97205. The listed phone number is (503) 299-9906.
What is Tammy Mai's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Tammy Mai enrolled in Medicare?
Yes. Tammy Mai 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 Tammy Mai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Mai reassigns Medicare benefits to 6 organizations: Oregon Anesthesiology Group PC (Portland, OR), Columbia Anesthesia Group P S (Vancouver, WA), Salem Health (Woodburn, OR), Good Samaritan Hospital Corvallis (Albany, OR), Premier Anesthesia Of Richland A Division Of Premier Anesthesia, LLC (Richland, WA) and 1 more organization, listed in the Medicare section above. 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 Tammy Mai's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Tammy Mai affiliated with any hospitals?
According to CMS data, Tammy Mai is affiliated with Good Samaritan Regional Medical Center, Legacy Good Samaritan Medical Center and Salem Hospital.
When was this NPI record last updated?
The NPPES record for Tammy Mai was last updated on December 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.
# Tammy Mai, D.O. · NPI 1275821902
Anesthesiology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since July 15, 2011.
## Identity
- **NPI:** 1275821902 (Entity type: Individual)
- **Enumerated:** July 15, 2011
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** DO173813 (Oregon)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 707 SW WASHINGTON ST, SUITE 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:** 6 organizations under Medicare reassignment (form CMS-855R): Oregon Anesthesiology Group PC (NPI 1477527786, Portland, OR); Columbia Anesthesia Group P S (NPI 1861448235, Vancouver, WA); Salem Health (NPI 1578112066, Woodburn, OR); Good Samaritan Hospital Corvallis (NPI 1063779205, Albany, OR); Premier Anesthesia Of Richland A Division Of Premier Anesthesia, LLC (NPI 1013940253, Richland, WA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of North Texas Hsc, College Of Osteopathic Med, class of 2010
## Record status
- **NPPES last updated:** December 8, 2025
- **Other identifiers:** Medicaid 500693239 (OR)
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Source: [NPI Profile](https://npiprofile.com/npi/1275821902) · Data from the CMS NPPES public registry.