Aaron Pfeifer, MD
Emergency Medicine Physician · Hays, KS
Aaron Pfeifer, MD is an emergency medicine physician with a practice address in Hays, Kansas, and NPI 1275912651, issued on May 19, 2015. Check the license (Kansas 0440949, as entered in NPPES) on the Kansas State Board of Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Aaron Pfeifer
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 0440949 KS
4301107428 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2220 Canterbury Dr, Hays, KS 67601
- Phone
- (785) 623-5555
- Enumerated
- May 19, 2015
- Record last updated
- Jun 14, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (785) 623-5518
- Medicare enrollment
- Enrolled (PECOS I20180619002411); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 2015
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 459 in Kansas → Look up another NPI →
Also registered at 2220 Canterbury Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Aaron Pfeifer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKansas State Board of Healing Arts
Search for license 0440949Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average emergency medicine physician in 2024
270 Medicare Part D claims for 204 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Ondansetron Odt35 claims
- Ciprofloxacin Hcl32 claims
- Levofloxacin19 claims
- Amoxicillin-Clavulanate Potass16 claims
- Doxycycline Monohydrate16 claims
- Nitrofurantoin Mono-Macro14 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): 85.7 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).
Bills Medicare through one group practice
- Hays Medical Center IncHays, KS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Pfeifer among 459 emergency medicine physician records in Kansas
Aaron Pfeifer, MD is one of 459 emergency medicine physician records with a practice address in Kansas. 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 2015, is newer than 67% of them.
- NPI issued2015 · 67% of these records are older, 31% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2015 · median 2011 among the 270 with a school on file
- Record last updated2018 · 49% 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 Kansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 emergency medicine physician records list a practice address in Hays
They are 10 of the 683 NPPES records with a practice address in Hays, and 459 emergency medicine physician records in Kansas.
All 459 in Kansas → Every provider in Hays → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jane Daugherty-Luck, DOHays, KS 676011003880725
- Marshall Eidenberg, D.O.Hays, KS 676011558352559
- John Jeter, MDHays, KS 676011609043660
- Solomon Kuah, M.D.Hays, KS 676011730383019
- Katie McWilliams, D.O.Hays, KS 676011568753820
- Derek Peckham, DOHays, KS 676011386374163
- Nathan Smith, M.D.Hays, KS 676011437413531
- Stephen Terrill, M.D.Hays, KS 676011922074533
Common questions
What is Aaron Pfeifer, MD's NPI number?
Aaron Pfeifer, MD's National Provider Identifier (NPI) is 1275912651, issued on May 19, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Pfeifer, MD located?
The NPPES record lists a practice address at 2220 Canterbury Dr, Hays, KS, 67601. Phone: (785) 623-5555. Providers update this record themselves, so call before visiting.
How can I verify Aaron Pfeifer, MD's license?
NPPES lists Kansas license number 0440949, as entered by the provider. Search the Kansas State Board of Healing Arts at https://www.ksbha.ks.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Aaron Pfeifer, MD prescribe under Medicare Part D?
In 2024, Aaron Pfeifer, MD had 270 Medicare Part D claims for 204 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Aaron Pfeifer, MD's MIPS final score?
The 2023 MIPS final score is 85.7 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.