NPPES file of Aug 9, 2026

Tammy Mai, D.O.

Anesthesiology Physician · Portland, OR

Tammy Mai, D.O. is an anesthesiology physician with a practice address in Portland, Oregon, and NPI 1275821902, issued on Jul 15, 2011. Check the license (Oregon DO173813, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275821902
Name
Tammy Mai
Credential
D.O.
Primary taxonomy
Anesthesiology Physician 207L00000X
License numbers
DO173813 OR
2011015606 MO
Self-reported in NPPES; status is on the state search
Practice location
707 SW Washington St, Portland, OR 97205
Phone
(503) 299-9906
Enumerated
Jul 15, 2011
Record last updated
Dec 8, 2025
Fax
(503) 225-9002
Medicaid ID
500693239 OR
Medicare enrollment
Enrolled (PECOS I20151029001785); accepts Medicare assignment
Medical or professional school
University Of North Texas Hsc, College Of Osteopathic Med, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest anesthesiology physician records → All 969 in Oregon → Look up another NPI →

Also registered at 707 SW Washington St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Matthew Abrahams, M.D.Anesthesiology Physician1467667428
  2. Mark Adams, M.D.Anesthesiology Physician1700044484
  3. Brent Andersen, MDAnesthesiology Physician1013981216
  4. Shea Anderson, MDAnesthesiology Physician1902073604
  5. Methapan Arunakul, MDAnesthesiology Physician1578756789
  6. Anunai Asthana, M.D.Anesthesiology Physician1871785014

Verify Tammy Mai in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license DO173813    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 3 group practices

  1. Good Samaritan Hospital CorvallisCorvallis, OR
  2. Oregon Anesthesiology Group PCPortland, OR
  3. Salem HealthSalem, OR

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tammy Mai among 969 anesthesiology physician records in Oregon

Tammy Mai, D.O. is one of 969 anesthesiology physician records with a practice address in Oregon. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 67% of them.

  • NPI issued2011 · 67% of these records are older, 30% newer
  • In a Medicare fileYes · 68% of these records are
  • In the CMS Doctors and Clinicians fileYes · 65% of these records are
  • Graduated2010 · median 2009 among the 627 with a school on file
  • Record last updated2025 · 64% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

578 anesthesiology physician records list a practice address in Portland

They are 578 of the 42,088 NPPES records with a practice address in Portland, and 969 anesthesiology physician records in Oregon.

All 969 in Oregon → Every provider in Portland → Anesthesiology Physician nationwide →

The 8 anesthesiology physician records with the nearest ZIP codes

  1. Brent Andersen, MDPortland, OR 972051013981216
  2. Ying-Hao Au, DOPortland, OR 972051225002439
  3. Neil Jeffery Axel, MDPortland, OR 972051194799304
  4. Michael Berry, MDPortland, OR 972051578537577
  5. Elizabeth Billerbeck, MDPortland, OR 972051538133749
  6. Bruce Bolton, MDPortland, OR 972051053385260
  7. Thomas Box, MDPortland, OR 972051861466088
  8. Matthew Buckon, MDPortland, OR 972051013981232

Common questions

What is Tammy Mai, D.O.'s NPI number?

Tammy Mai, D.O.'s National Provider Identifier (NPI) is 1275821902, issued on Jul 15, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Tammy Mai, D.O. located?

The NPPES record lists a practice address at 707 SW Washington St, Portland, OR, 97205. Phone: (503) 299-9906. Providers update this record themselves, so call before visiting.

How can I verify Tammy Mai, D.O.'s license?

NPPES lists Oregon license number DO173813, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.