NPPES file of Aug 9, 2026

Joseph A. De Leon, MD

Internal Medicine Physician · Wynnewood, PA

Joseph A. De Leon, MD is an internal medicine physician with a practice address in Wynnewood, Pennsylvania, and NPI 1821380551, issued on May 13, 2011. Check the license (Pennsylvania MD443525, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1821380551
Name
Joseph A. De Leon
Credential
MD
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
MD443525 PA
15869 NV
Self-reported in NPPES; status is on the state search
Practice location
300 E Lancaster Ave, Wynnewood, PA 19096
Phone
(610) 642-2002
Enumerated
May 13, 2011
Record last updated
Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(610) 642-7607
Medicare enrollment
Enrolled (PECOS I20180927002329); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →

Also registered at 300 E Lancaster Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

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  4. Sara Deichman, LCSWClinical Social Worker1770718199
  5. Ann Eichen, PH.D.Clinical Psychologist1104045558
  6. Tracey Ellenbogen, MSW,LCSWClinical Social Worker1134261357

Verify Joseph A. De Leon in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
    Search for license MD443525    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Pennsylvania license search

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21% fewer Medicare Part D claims than the average internal medicine physician in 2024

2,523 Medicare Part D claims for 419 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. Joseph De Leon2,523
  2. Specialty average3,176

Most prescribed

  1. Calcitriol351 claims
  2. Amlodipine Besylate231 claims
  3. Furosemide204 claims
  4. Terazosin Hcl204 claims
  5. Losartan Potassium176 claims
  6. Sevelamer Carbonate110 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.

Industry payments in 2024: $23.27

1 payment: food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Joseph De Leon$23.27
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Permanente Medical Group IncSacramento, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Joseph A. De Leon among 7,300 internal medicine physician records in Pennsylvania

Joseph A. De Leon, MD 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 2011, is newer than 52% of them.

  • NPI issued2011 · 52% of these records are older, 45% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 58% of these records are
  • Graduated2005 · median 2008 among the 4,208 with a school on file
  • Record last updated2021 · 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

  1. M Susan Burke, MDWynnewood, PA 190961083694442
  2. David Cohen, MDWynnewood, PA 190961215908645
  3. Donald Corey, MDWynnewood, PA 190961245201706
  4. Daniel Lazowick, DOWynnewood, PA 190961063483527
  5. William Miller, M.D.Wynnewood, PA 190961801850060
  6. James Morris, MDWynnewood, PA 190961912979923
  7. John Nansteel, MDWynnewood, PA 190961558333583
  8. Colleen O'Connor, MDWynnewood, PA 190961922087154

Common questions

What is Joseph A. De Leon, MD's NPI number?

Joseph A. De Leon, MD's National Provider Identifier (NPI) is 1821380551, issued on May 13, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Joseph A. De Leon, MD located?

The NPPES record lists a practice address at 300 E Lancaster Ave, Wynnewood, PA, 19096. Phone: (610) 642-2002. Providers update this record themselves, so call before visiting.

How can I verify Joseph A. De Leon, MD's license?

NPPES lists Pennsylvania license number MD443525, 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 Joseph A. De Leon, MD prescribe under Medicare Part D?

In 2024, Joseph A. De Leon, MD had 2,523 Medicare Part D claims for 419 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.