Rosamund Slack Lehmann, M.D.
Emergency Medicine Physician · West Chester, PA
Rosamund Slack Lehmann, M.D. is an emergency medicine physician with a practice address in West Chester, Pennsylvania, and NPI 1508157058, issued on May 2, 2011. Check the license (Pennsylvania MD452795, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Rosamund Slack Lehmann
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD452795 PA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Westtown RD, West Chester, PA 19382
- Phone
- (202) 412-1303
- Enumerated
- May 2, 2011
- Record last updated
- Aug 14, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20141001000005); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2011
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 975 Westtown RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judene Wint-Martin, DNP, CRNPPediatric Nurse Practitioner1831393511
Verify Rosamund Slack Lehmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD452795Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average emergency medicine physician in 2024
54 Medicare Part D claims for 38 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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): 81.5 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
- 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).
Rosamund Slack Lehmann among 3,911 emergency medicine physician records in Pennsylvania
Rosamund Slack Lehmann, M.D. 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 2011, is newer than 49% of them.
- NPI issued2011 · 49% of these records are older, 48% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2011 · median 2013 among the 2,231 with a school on file
- Record last updated2014 · 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
- John Contino, MDWest Chester, PA 193821407803349
- Catherine Pelletier-Dattu, MDWest Chester, PA 193821942299623
- Francis Speidel, M.D.West Chester, PA 193821093939142
- Franklin Kelton, MDWest Chester, PA 193811295741429
- Veda Maany, M.D.West Chester, PA 193831306045612
- Richard Stiles, DOWest Chester, PA 193811437262672
- Douglas Ader, DO, PA-CWest Chester, PA 193801235486838
- Davis Clark, DOWest Chester, PA 193801992741318
Common questions
What is Rosamund Slack Lehmann, M.D.'s NPI number?
Rosamund Slack Lehmann, M.D.'s National Provider Identifier (NPI) is 1508157058, issued on May 2, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Rosamund Slack Lehmann, M.D. located?
The NPPES record lists a practice address at 975 Westtown RD, West Chester, PA, 19382. Phone: (202) 412-1303. Providers update this record themselves, so call before visiting.
How can I verify Rosamund Slack Lehmann, M.D.'s license?
NPPES lists Pennsylvania license number MD452795, 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 Rosamund Slack Lehmann, M.D. prescribe under Medicare Part D?
In 2024, Rosamund Slack Lehmann, M.D. had 54 Medicare Part D claims for 38 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Rosamund Slack Lehmann, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.5 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.