Mary D. Davis, D.O.
Emergency Medicine Physician · Butler, PA
Mary D. Davis, D.O. is an emergency medicine physician with a practice address in Butler, Pennsylvania, and NPI 1285658286, issued on Jul 26, 2006. Check the license (Pennsylvania OS012969, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mary D. Davis
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- OS012969 PA
Self-reported in NPPES; status is on the state search - Practice location
- 911 E Brady St, Butler, PA 16001
- Phone
- (724) 284-4550
- Enumerated
- Jul 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (724) 281-4032
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 911 E Brady St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Adams, M.D.Emergency Medicine Physician1346264348
- Surbhi AgarwalFamily Medicine Physician1093955320
- Geoffrey Mann, M.D.Emergency Medicine Physician1306860390
- Robert McNerney, DOInternal Medicine Physician1184630881
- William Michalak, M.D.Anatomic Pathology & Clinical Pathology Physician1063475648
- James MinshullEmergency Medicine Physician1902827843
Verify Mary D. Davis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS012969Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average emergency medicine physician in 2024
28 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Mary D. Davis among 3,911 emergency medicine physician records in Pennsylvania
Mary D. Davis, D.O. is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 69% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2007 · 51% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Pennsylvania
There are 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in Butler → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Richard Adams, M.D.Butler, PA 160011346264348
- Andrew Lee, M.D.Butler, PA 160011295053700
- Geoffrey Mann, M.D.Butler, PA 160011306860390
- James MinshullButler, PA 160011902827843
- Christine Patton, M.D.Butler, PA 160011235106931
- Gregory Pletz, MDButler, PA 160011285707257
- Reginald Reginella, D.O.Butler, PA 160011205881901
- Alyssa Rice, D.O.Butler, PA 160011497042592
Common questions
What is Mary D. Davis, D.O.'s NPI number?
Mary D. Davis, D.O.'s National Provider Identifier (NPI) is 1285658286, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary D. Davis, D.O. located?
The NPPES record lists a practice address at 911 E Brady St, Butler, PA, 16001. Phone: (724) 284-4550. Providers update this record themselves, so call before visiting.
How can I verify Mary D. Davis, D.O.'s license?
NPPES lists Pennsylvania license number OS012969, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary D. Davis, D.O. prescribe under Medicare Part D?
In 2024, Mary D. Davis, D.O. had 28 Medicare Part D claims; 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.