Aaron Spencer Perez, DO
Emergency Medicine Physician · Medford, OR
Aaron Spencer Perez, DO is an emergency medicine physician with a practice address in Medford, Oregon, and NPI 1710621990, issued on Apr 25, 2022. Check the license (Oregon DO224480, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Aaron Spencer Perez
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- DO224480 OR
BP10080036 TX
V0837 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2825 E Barnett RD, Medford, OR 97504
- Phone
- (541) 789-7000
- Enumerated
- Apr 25, 2022
- Record last updated
- Jun 13, 2025
- Medicare enrollment
- Enrolled (PECOS I20250714000080); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,079 in Oregon → Look up another NPI →
Also registered at 2825 E Barnett RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Aaron Spencer Perez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO224480Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average emergency medicine physician in 2024
33 Medicare Part D claims for 25 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- AsanteMedford, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Spencer Perez among 1,079 emergency medicine physician records in Oregon
Aaron Spencer Perez, DO is one of 1,079 emergency medicine physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 97% of them.
- NPI issued2022 · 97% of these records are older, 1% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2022 · median 2013 among the 557 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 emergency medicine physician records list a practice address in Medford
They are 54 of the 4,542 NPPES records with a practice address in Medford, and 1,079 emergency medicine physician records in Oregon.
All 1,079 in Oregon → Every provider in Medford → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kenneth Brown, M.D.Medford, OR 975041457570178
- Joshua Cott, MDMedford, OR 975041629051669
- Ronald Crowell, MDMedford, OR 975041689705220
- Robert Evans, MDMedford, OR 975041730134404
- Eileen Killackey-Bobek, MDMedford, OR 975041710016811
- Gary Marks, DOMedford, OR 975041861569212
- Mona McArdle, M.D.Medford, OR 975041972656395
- Julie Phillips, MDMedford, OR 975041316074446
Common questions
What is Aaron Spencer Perez, DO's NPI number?
Aaron Spencer Perez, DO's National Provider Identifier (NPI) is 1710621990, issued on Apr 25, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Spencer Perez, DO located?
The NPPES record lists a practice address at 2825 E Barnett RD, Medford, OR, 97504. Phone: (541) 789-7000. Providers update this record themselves, so call before visiting.
How can I verify Aaron Spencer Perez, DO's license?
NPPES lists Oregon license number DO224480, 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.
How much does Aaron Spencer Perez, DO prescribe under Medicare Part D?
In 2024, Aaron Spencer Perez, DO had 33 Medicare Part D claims for 25 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.
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.