Jason Cassidy Herfindahl, MD
Emergency Medicine Physician · Medford, OR
Jason Cassidy Herfindahl, MD is an emergency medicine physician with a practice address in Medford, Oregon, and NPI 1144886433, issued on May 13, 2019. Check the license (Oregon MD220039, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jason Cassidy Herfindahl
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD220039 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2825 E Barnett RD, Medford, OR 97504
- Phone
- (541) 880-8460
- Enumerated
- May 13, 2019
- Record last updated
- Aug 26, 2024
- 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 Jason Cassidy Herfindahl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD220039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% more Medicare Part D claims than the average emergency medicine physician in 2024
241 Medicare Part D claims for 172 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 20 claims were for opioids.
Most prescribed
- Cephalexin27 claims
- Naproxen24 claims
- Dexamethasone21 claims
- Azithromycin19 claims
- Hydrocodone-Acetaminophen17 claims
- Albuterol Sulfate Hfa11 claims
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.
Jason Cassidy Herfindahl among 1,079 emergency medicine physician records in Oregon
Jason Cassidy Herfindahl, MD 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 2019, is newer than 87% of them.
- NPI issued2019 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2024 · 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 Jason Cassidy Herfindahl, MD's NPI number?
Jason Cassidy Herfindahl, MD's National Provider Identifier (NPI) is 1144886433, issued on May 13, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Jason Cassidy Herfindahl, MD located?
The NPPES record lists a practice address at 2825 E Barnett RD, Medford, OR, 97504. Phone: (541) 880-8460. Providers update this record themselves, so call before visiting.
How can I verify Jason Cassidy Herfindahl, MD's license?
NPPES lists Oregon license number MD220039, 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 Jason Cassidy Herfindahl, MD prescribe under Medicare Part D?
In 2024, Jason Cassidy Herfindahl, MD had 241 Medicare Part D claims for 172 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.