Douglas Ader, DO, PA-C
Emergency Medicine Physician · West Chester, PA
Douglas Ader, DO, PA-C is an emergency medicine physician with a practice address in West Chester, Pennsylvania, and NPI 1235486838, issued on Aug 14, 2012. Check the license (Pennsylvania OS021842, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Douglas Ader
- Credential
- DO, PA-C
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- OS021842 PA
CE-0007077 DE
25MP00289600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 701 E Marshall St, West Chester, PA 19380
- Phone
- (610) 431-5151
- Enumerated
- Aug 14, 2012
- Record last updated
- Jul 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20220708003679); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2019
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 701 E Marshall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Thierry Arnoult, ACNPAcute Care Nurse Practitioner1114383403
- Chloe AustinCase Management Registered Nurse1508713660
- Muhammet Ayanoglu, MDPediatrics Physician1699295428
- Christopher Aylsworth, PA-CSurgical Physician Assistant1861455982
Verify Douglas Ader in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS021842Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average emergency medicine physician in 2024
124 Medicare Part D claims for 98 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Cephalexin17 claims
- Cefpodoxime Proxetil13 claims
- Prednisone12 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 practice group's MIPS final score for 2023 (Medicare payment program): 87 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Emergency Care Specialists PCWest Chester, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Ader among 3,911 emergency medicine physician records in Pennsylvania
Douglas Ader, DO, PA-C 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 2012, is newer than 52% of them.
- NPI issued2012 · 52% of these records are older, 45% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2019 · median 2013 among the 2,231 with a school on file
- Record last updated2022 · 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 West Chester → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Davis Clark, DOWest Chester, PA 193801992741318
- Tamara Donatelli, D.O.West Chester, PA 193801518278753
- Ricardo Gelman, MDWest Chester, PA 193801417963638
- Diana Kane, MDWest Chester, PA 193801679580955
- Catherine Lubwama, MDWest Chester, PA 193801518070754
- Matthew McMullan, M.D.West Chester, PA 193801356705792
- Michael Mihalakis, MDWest Chester, PA 193801740250554
- Justin Roe, M.D.West Chester, PA 193801538393079
Common questions
What is Douglas Ader, DO, PA-C's NPI number?
Douglas Ader, DO, PA-C's National Provider Identifier (NPI) is 1235486838, issued on Aug 14, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Ader, DO, PA-C located?
The NPPES record lists a practice address at 701 E Marshall St, West Chester, PA, 19380. Phone: (610) 431-5151. Providers update this record themselves, so call before visiting.
How can I verify Douglas Ader, DO, PA-C's license?
NPPES lists Pennsylvania license number OS021842, 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 Douglas Ader, DO, PA-C prescribe under Medicare Part D?
In 2024, Douglas Ader, DO, PA-C had 124 Medicare Part D claims for 98 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Douglas Ader, DO, PA-C's MIPS final score?
The 2023 MIPS final score is 87 of 100, reported for the practice group. 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.