NPPES file of Aug 9, 2026

Mary Youssef- Isaac, DDS

General Practice Dentistry · Woodlyn, PA

Mary Youssef- Isaac, DDS is a general practice dentistry with a practice address in Woodlyn, Pennsylvania, and NPI 1326604489, issued on May 14, 2019. Check the license (Pennsylvania DS042633, as entered in NPPES) with the Pennsylvania board that licenses this profession; 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
1326604489
Name
Mary Youssef- Isaac
Credential
DDS
Primary taxonomy
General Practice Dentistry 1223G0001X
License numbers
DS042633 PA
D14177 MN
Self-reported in NPPES; status is on the state search
Practice location
550 Fairview RD, Woodlyn, PA 19094
Phone
(610) 833-2660
Enumerated
May 14, 2019
Record last updated
Feb 8, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest general practice dentistry records → All 4,612 in Pennsylvania → Look up another NPI →

Verify Mary Youssef- Isaac in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
    Search for license DS042633    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
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64% fewer Medicare Part D claims than the average general practice dentistry in 2024

30 Medicare Part D claims for 27 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Mary Youssef- Isaac30
  2. Specialty average83

Most prescribed

  1. Amoxicillin21 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.

Mary Youssef- Isaac among 4,612 general practice dentistry records in Pennsylvania

Mary Youssef- Isaac, DDS is one of 4,612 general practice dentistry records with a practice address in Pennsylvania. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 84% of them.

  • NPI issued2019 · 84% of these records are older, 14% newer
  • In a Medicare fileYes · 63% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2022 · 76% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

2 general practice dentistry records list a practice address in Woodlyn

They are 2 of the 32 NPPES records with a practice address in Woodlyn, and 4,612 general practice dentistry records in Pennsylvania.

All 4,612 in Pennsylvania → Every provider in Woodlyn → General Practice Dentistry nationwide →

The 8 general practice dentistry records with the nearest ZIP codes

  1. Russell Young, D.D.S.Woodlyn, PA 190941003977331
  2. Victoria Galenas, DMDWyncote, PA 190951538848189
  3. Rock Shadduck, DMDWyncote, PA 190951124642392
  4. Domenic Baglivo, D.M.D.Wynnewood, PA 190961952413569
  5. Steven Danzig, D.D.S.Wynnewood, PA 190961487628319
  6. Thomas Definnis, D.M.D., P.C.Wynnewood, PA 190961770612624
  7. Nancy Dipietro, D.D.S.Wynnewood, PA 190961437123163
  8. William Snider, D.M.D.Wynnewood, PA 190961497917785

Common questions

What is Mary Youssef- Isaac, DDS's NPI number?

Mary Youssef- Isaac, DDS's National Provider Identifier (NPI) is 1326604489, issued on May 14, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Mary Youssef- Isaac, DDS located?

The NPPES record lists a practice address at 550 Fairview RD, Woodlyn, PA, 19094. Phone: (610) 833-2660. Providers update this record themselves, so call before visiting.

How can I verify Mary Youssef- Isaac, DDS's license?

NPPES lists Pennsylvania license number DS042633, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.

How much does Mary Youssef- Isaac, DDS prescribe under Medicare Part D?

In 2024, Mary Youssef- Isaac, DDS had 30 Medicare Part D claims for 27 beneficiaries; the average among general practice dentistry prescribers was 83. 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.