Ronald J. Werrin, MD
Internal Medicine Physician · Bala Cynwyd, PA
Ronald J. Werrin, MD is an internal medicine physician with a practice address in Bala Cynwyd, Pennsylvania, and NPI 1245299254, issued on Mar 20, 2006. Check the license (Pennsylvania MD021473E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Ronald J. Werrin
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD021473E PA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Bala Plaza, Bala Cynwyd, PA 19004
- Phone
- (610) 668-9999
- Enumerated
- Mar 20, 2006
- Record last updated
- Oct 25, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (610) 668-7188
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 2 Bala Plaza
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Verify Ronald J. Werrin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD021473ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
24 Medicare Part D claims, against an average of 3,176 among the 108,855 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.
Ronald J. Werrin among 7,300 internal medicine physician records in Pennsylvania
Ronald J. Werrin, 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 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 fileNo · 58% of these records are
- Record last updated2012 · 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).
20 internal medicine physician records list a practice address in Bala Cynwyd
They are 20 of the 794 NPPES records with a practice address in Bala Cynwyd, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Bala Cynwyd → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Bado, D.O.Bala Cynwyd, PA 190041801908173
- Ronald Barg, MDBala Cynwyd, PA 190041518932557
- Frances Bryan, MDBala Cynwyd, PA 190041205845385
- Janine Kyrillos, M.D.Bala Cynwyd, PA 190041467487595
- Renee McDonough, MDBala Cynwyd, PA 190041669452439
- Celeste Mruk, MDBala Cynwood, PA 190041700812401
- Charles Orellana, MDBala Cynwyd, PA 190041396775425
- Daniel Parish, MDBala Cynwyd, PA 190041063608693
Common questions
What is Ronald J. Werrin, MD's NPI number?
Ronald J. Werrin, MD's National Provider Identifier (NPI) is 1245299254, issued on Mar 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Werrin, MD located?
The NPPES record lists a practice address at 2 Bala Plaza, Bala Cynwyd, PA, 19004. Phone: (610) 668-9999. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Werrin, MD's license?
NPPES lists Pennsylvania license number MD021473E, 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 Ronald J. Werrin, MD prescribe under Medicare Part D?
In 2024, Ronald J. Werrin, MD had 24 Medicare Part D claims; 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.