Alison Joy Leff, DO
Internal Medicine Physician · Wynnewood, PA
Alison Joy Leff, DO is an internal medicine physician with a practice address in Wynnewood, Pennsylvania, and NPI 1568499473, issued on Jun 27, 2006. Check the license (Pennsylvania OS013095, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Alison Joy Leff
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS013095 PA
Self-reported in NPPES; status is on the state search - Practice location
- 300 E Lancaster Ave Ste 400, Wynnewood, PA 19096
- Phone
- (610) 642-2002
- Enumerated
- Jun 27, 2006
- Record last updated
- Jan 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (610) 642-7607
- Medicare enrollment
- Enrolled (PECOS I20040712000177); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2000
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Verify Alison Joy Leff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS013095Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.9 times the Medicare Part D claims of the average internal medicine physician in 2024
15,638 Medicare Part D claims for 415 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 123 claims were for opioids.
Most prescribed
- Atorvastatin Calcium831 claims
- Eliquis667 claims
- Gabapentin560 claims
- Amlodipine Besylate485 claims
- Furosemide381 claims
- Trazodone Hcl353 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.
Bills Medicare through 2 group practices
- Alignmed Medical Group PCBoothwyn, PA
- Bryn Mawr Medical Specialists AssociationBryn Mawr, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alison Joy Leff among 7,300 internal medicine physician records in Pennsylvania
Alison Joy Leff, DO is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2000 · median 2008 among the 4,208 with a school on file
- Record last updated2018 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
150 internal medicine physician records list a practice address in Wynnewood
They are 150 of the 1,246 NPPES records with a practice address in Wynnewood, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Wynnewood → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- M Susan Burke, MDWynnewood, PA 190961083694442
- David Cohen, MDWynnewood, PA 190961215908645
- Donald Corey, MDWynnewood, PA 190961245201706
- Daniel Lazowick, DOWynnewood, PA 190961063483527
- William Miller, M.D.Wynnewood, PA 190961801850060
- James Morris, MDWynnewood, PA 190961912979923
- John Nansteel, MDWynnewood, PA 190961558333583
- Colleen O'Connor, MDWynnewood, PA 190961922087154
Common questions
What is Alison Joy Leff, DO's NPI number?
Alison Joy Leff, DO's National Provider Identifier (NPI) is 1568499473, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alison Joy Leff, DO located?
The NPPES record lists a practice address at 300 E Lancaster Ave Ste 400, Wynnewood, PA, 19096. Phone: (610) 642-2002. Providers update this record themselves, so call before visiting.
How can I verify Alison Joy Leff, DO's license?
NPPES lists Pennsylvania license number OS013095, 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 Alison Joy Leff, DO prescribe under Medicare Part D?
In 2024, Alison Joy Leff, DO had 15,638 Medicare Part D claims for 415 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.