Ellen Marie Diefenderfer, PA-C
Physician Assistant · Columbus, OH
Ellen Marie Diefenderfer, PA-C is a physician assistant with a practice address in Columbus, Ohio, and NPI 1073909289, issued on Apr 14, 2015. Check the license (Ohio 50.004326RX, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellen Marie Diefenderfer
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 50.004326RX OH
Self-reported in NPPES; status is on the state search - Practice location
- 300 W 10TH Ave FL 2, Columbus, OH 43210
- Phone
- (614) 293-9059
- Enumerated
- Apr 14, 2015
- Record last updated
- May 19, 2026
- Fax
- (614) 293-0201
- Medicare enrollment
- Enrolled (PECOS I20150804005048); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 5,325 in Ohio → Look up another NPI →
Also registered at 300 W 10TH Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ellen Marie Diefenderfer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 50.004326RXCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average physician assistant in 2024
63 Medicare Part D claims for 39 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Gabapentin14 claims
- Oxycodone Hcl14 claims
- Tramadol Hcl11 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.
The MIPS final score for 2023 (Medicare payment program): 95.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,961.55
13 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Osu Surgery, LLCColumbus, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Marie Diefenderfer among 5,325 physician assistant records in Ohio
Ellen Marie Diefenderfer, PA-C is one of 5,325 physician assistant records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 33% of them.
- NPI issued2015 · 33% of these records are older, 63% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2014 · median 2019 among the 3,621 with a school on file
- Record last updated2026 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
726 physician assistant records list a practice address in Columbus
They are 726 of the 36,491 NPPES records with a practice address in Columbus, and 5,325 physician assistant records in Ohio.
All 5,325 in Ohio → Every provider in Columbus → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Megan Adelman, PA-CColumbus, OH 432101437355492
- Michelle Angelis, PA-CColumbus, OH 432101205952603
- Marsha Bendle, MS, PA-CColumbus, OH 432101407975535
- Amy Brokken, PA-CColumbus, OH 432101861471773
- Ajwad Farah, PA-CColumbus, OH 432101982668075
- Kerfala Fofana, PA-CColumbus, OH 432101508072331
- Jessica Hann, PA-CColumbus, OH 432101144238254
- Michelle Moyer, P.A.-C.Columbus, OH 432101740203074
Common questions
What is Ellen Marie Diefenderfer, PA-C's NPI number?
Ellen Marie Diefenderfer, PA-C's National Provider Identifier (NPI) is 1073909289, issued on Apr 14, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Marie Diefenderfer, PA-C located?
The NPPES record lists a practice address at 300 W 10TH Ave FL 2, Columbus, OH, 43210. Phone: (614) 293-9059. Providers update this record themselves, so call before visiting.
How can I verify Ellen Marie Diefenderfer, PA-C's license?
NPPES lists Ohio license number 50.004326RX, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does Ellen Marie Diefenderfer, PA-C prescribe under Medicare Part D?
In 2024, Ellen Marie Diefenderfer, PA-C had 63 Medicare Part D claims for 39 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Ellen Marie Diefenderfer, PA-C's MIPS final score?
The 2023 MIPS final score is 95.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.