Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Tammy Mai, DO

Individual provider Anesthesiology Physician · NPI 1275821902

Tammy Mai, DO practises Anesthesiology in Portland, Oregon. Graduated from University of North Texas Hsc, College of Osteopathic Med in 2010, 16 years ago. Practices with Oregon Anesthesiology Group PC, a 233-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri and Oregon.

Years since qualifying
16
Trained at
University of North Texas Hsc, College of Osteopathic Med
Licensed in
MO, OR
In the registry since
2011
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

707 SW Washington St Ste 700
Portland, OR 97205-3536
Phone: (503) 299-9906
Fax: (503) 225-9002
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3600 Nw Samaritan Dr, Corvallis, OR 97330-5472 — (541) 768-5111

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence DO173813 (OR)
Anesthesiology Physician Taxonomy 207L00000X · Licence 2011015606 (MO)

Record details

NPI number1275821902
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedJuly 15, 2011
Last updated in NPPESDecember 8, 2025
Certification dateDecember 8, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF NORTH TEXAS HSC, COLLEGE OF OSTEOPATHIC MED
Graduated 2010 (16 years in practice)
Group practice Oregon Anesthesiology Group Pc — 233 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients87
Services billed 171 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Oregon Anesthesiology Group PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 233 clinicians in the practice; 12 are shown here.

Other providers in Portland