Joanna Sawyer Mazer, PAC
Physician Assistant · Coatesville, PA
Joanna Sawyer Mazer, PAC is a physician assistant with a practice address in Coatesville, Pennsylvania, and NPI 1821276908, issued on Jan 31, 2008. Check the license (Pennsylvania MA050871, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joanna Sawyer Mazer
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- MA050871 PA
Self-reported in NPPES; status is on the state search - Practice location
- 201 Reeceville RD, Coatesville, PA 19320
- Phone
- (610) 383-8434
- Enumerated
- Jan 31, 2008
- Record last updated
- Sep 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090921000521); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 8,020 in Pennsylvania → Look up another NPI →
Also registered at 201 Reeceville RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carolyn Brown, PA-CPhysician Assistant1306972203
- Karen Brown, CRNPAcute Care Nurse Practitioner1275878654
- Sunila Byreddy, MDInternal Medicine Physician1275594541
- Shannin Dabrow, R.N.Registered Nurse1770762999
- Nichola Dibattista, PA-CPhysician Assistant1396755690
- Kathryn Frankel, M.D.Emergency Medicine Physician1023407616
Verify Joanna Sawyer Mazer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license MA050871Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Jefferson University PhysiciansPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joanna Sawyer Mazer among 8,020 physician assistant records in Pennsylvania
Joanna Sawyer Mazer, PAC is one of 8,020 physician assistant records with a practice address in Pennsylvania. 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 2008, is newer than 20% of them.
- NPI issued2008 · 20% of these records are older, 77% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2001 · median 2018 among the 5,313 with a school on file
- Record last updated2009 · 42% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 physician assistant records list a practice address in Coatesville
They are 10 of the 648 NPPES records with a practice address in Coatesville, and 8,020 physician assistant records in Pennsylvania.
All 8,020 in Pennsylvania → Every provider in Coatesville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Helen Book, PA-CCoatesville, PA 193201528177607
- Carolyn Brown, PA-CCoatesville, PA 193201306972203
- Nichola Dibattista, PA-CCoatesville, PA 193201396755690
- Joseph Heng, DC, MS, PA-CCoatesville, PA 193201033269402
- Caitlin KratzerCoatesville, PA 193201104563840
- Pamela Parker, PA-CCoatesville, PA 193201023027638
- Peter Sands, PA-CCoatesville, PA 193201245249168
- Aimee Simmons, PACoatesville, PA 193201699899419
Common questions
What is Joanna Sawyer Mazer, PAC's NPI number?
Joanna Sawyer Mazer, PAC's National Provider Identifier (NPI) is 1821276908, issued on Jan 31, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Sawyer Mazer, PAC located?
The NPPES record lists a practice address at 201 Reeceville RD, Coatesville, PA, 19320. Phone: (610) 383-8434. Providers update this record themselves, so call before visiting.
How can I verify Joanna Sawyer Mazer, PAC's license?
NPPES lists Pennsylvania license number MA050871, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity 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.