Ryan Michael Mascio, D.O.
Pediatrics Physician · Bryn Mawr, PA
Ryan Michael Mascio, D.O. is a pediatrics physician with a practice address in Bryn Mawr, Pennsylvania, and NPI 1134380074, issued on Jun 23, 2008. Check the license (Pennsylvania OS019565, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ryan Michael Mascio
- Credential
- D.O.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- OS019565 PA
0102202563 VA
Self-reported in NPPES; status is on the state search - Practice location
- 663 W Lancaster Ave, Bryn Mawr, PA 19010
- Phone
- (610) 658-0999
- Enumerated
- Jun 23, 2008
- Record last updated
- Mar 20, 2023
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,382 in Pennsylvania → Look up another NPI →
Also registered at 663 W Lancaster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Saya Bery, MDPediatrics Physician1558948851
- Christina Rice, CPNPPrimary Care Nurse Practitioner1336745710
- Spiridon Vonortas, MD, MPHPediatrics Physician1720738248
Verify Ryan Michael Mascio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS019565Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ryan Michael Mascio among 3,382 pediatrics physician records in Pennsylvania
Ryan Michael Mascio, D.O. is one of 3,382 pediatrics physician records with a practice address in Pennsylvania. 25% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2008, is newer than 48% of them.
- NPI issued2008 · 48% of these records are older, 47% newer
- In a Medicare fileNo · 25% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 pediatrics physician records list a practice address in Bryn Mawr
They are 22 of the 1,496 NPPES records with a practice address in Bryn Mawr, and 3,382 pediatrics physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,382 in Pennsylvania → Every provider in Bryn Mawr → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Theodore Clair, MDBryn Mawr, PA 190101487693107
- Alison Cook, D.O.Bryn Mawr, PA 190101336286988
- James Coplan, MDBryn Mawr, PA 190101619095916
- Hazel Guinto, MDBryn Mawr, PA 190101821180704
- Lisa Heller, MDBryn Mawr, PA 190101245267145
- Sarah Kim, MDBryn Mawr, PA 190101750575346
- Linda Klinow, MDBryn Mawr, PA 190101750312203
- Bettina Lesser, MDBryn Mawr, PA 190101306921481
Common questions
What is Ryan Michael Mascio, D.O.'s NPI number?
Ryan Michael Mascio, D.O.'s National Provider Identifier (NPI) is 1134380074, issued on Jun 23, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Michael Mascio, D.O. located?
The NPPES record lists a practice address at 663 W Lancaster Ave, Bryn Mawr, PA, 19010. Phone: (610) 658-0999. Providers update this record themselves, so call before visiting.
How can I verify Ryan Michael Mascio, D.O.'s license?
NPPES lists Pennsylvania license number OS019565, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.