Mary L. Keirsey, CRNP
Adult Health Nurse Practitioner · West Chester, PA
Mary L. Keirsey, CRNP is an adult health nurse practitioner with a practice address in West Chester, Pennsylvania, and NPI 1518132687, issued on Apr 29, 2008. Check the license (Pennsylvania SP009800, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary L. Keirsey
- Credential
- CRNP
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- SP009800 PA
Self-reported in NPPES; status is on the state search - Practice location
- 701 E Marshall St, West Chester, PA 19380
- Phone
- (610) 431-5000
- Enumerated
- Apr 29, 2008
- Record last updated
- Jul 21, 2022
- Medicare enrollment
- Enrolled (PECOS I20080703000362); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,368 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.
- Douglas Ader, DO, PA-CEmergency Medicine Physician1235486838
- Katherine Ansel, PA-CPhysician Assistant1417847062
- Nicholas Archer, PA-CSurgical Physician Assistant1114171774
- Thierry Arnoult, ACNPAcute Care Nurse Practitioner1114383403
- Chloe AustinCase Management Registered Nurse1508713660
- Muhammet Ayanoglu, MDPediatrics Physician1699295428
Verify Mary L. Keirsey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license SP009800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 86.8 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
- Clinical Care Associates OF The University OF Pennsylvania Health.West Chester, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary L. Keirsey among 1,368 adult health nurse practitioner records in Pennsylvania
Mary L. Keirsey, CRNP is one of 1,368 adult health nurse practitioner records with a practice address in Pennsylvania. 68% 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 33% of them.
- NPI issued2008 · 33% of these records are older, 60% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2007 · median 2012 among the 678 with a school on file
- Record last updated2022 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Health Nurse Practitioner providers in Pennsylvania
There are 1,368 adult health nurse practitioner records in Pennsylvania.
All 1,368 in Pennsylvania → Every provider in West Chester → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Joanne Boyk, CRNPWest Chester, PA 193801134335391
- January Chaffee-Pasquantonio, CRNPWest Chester, PA 193801447383484
- Jennifer Coates, CRNPWest Chester, PA 193801366521593
- Lani Farrell, CRNPWest Chester, PA 193801558533992
- Susan Gray, CRNPWest Chester, PA 193801053558577
- Megan Kabatt, NPWest Chester, PA 193801285888743
- Jane O'Neill, CRNPWest Chester, PA 193801225287436
- Cheryl Schlamb, CRNPWest Chester, PA 193801538386024
Common questions
What is Mary L. Keirsey, CRNP's NPI number?
Mary L. Keirsey, CRNP's National Provider Identifier (NPI) is 1518132687, issued on Apr 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mary L. Keirsey, CRNP located?
The NPPES record lists a practice address at 701 E Marshall St, West Chester, PA, 19380. Phone: (610) 431-5000. Providers update this record themselves, so call before visiting.
How can I verify Mary L. Keirsey, CRNP's license?
NPPES lists Pennsylvania license number SP009800, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
What is Mary L. Keirsey, CRNP's MIPS final score?
The 2023 MIPS final score is 86.8 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.