John R. Walsh, DO
Internal Medicine Physician · West Chester, PA
John R. Walsh, DO is an internal medicine physician with a practice address in West Chester, Pennsylvania, and NPI 1649271180, issued on Aug 9, 2005. Check the license (Pennsylvania OS006953L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John R. Walsh
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS006953L PA
Self-reported in NPPES; status is on the state search - Practice location
- 210 Willowbrook LN, West Chester, PA 19382
- Phone
- (610) 696-8900
- Enumerated
- Aug 9, 2005
- Record last updated
- Jan 31, 2025
- Fax
- (610) 696-3890
- Medicaid ID
- 1294915 PA
- Medicare enrollment
- Enrolled (PECOS I20060123000569); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1988
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 210 Willowbrook LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Bailey, CRNPAdult Health Nurse Practitioner1912252685
- Samira Dabiri Zanjani, M.D.Neurology Physician1487911764
- Donna Fitzgerald, CRNPFamily Nurse Practitioner1851849152
- Ronald Fronduti, MDInternal Medicine Physician1568494847
- Mark Lasorda, DOInternal Medicine Physician1871913954
- Kenya Lindsay, CRNPAdult Health Nurse Practitioner1790211282
Verify John R. Walsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS006953LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average internal medicine physician in 2024
10,991 Medicare Part D claims for 964 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 315 claims were for opioids.
Most prescribed
- Atorvastatin Calcium699 claims
- Amlodipine Besylate612 claims
- Levothyroxine Sodium424 claims
- Metoprolol Succinate353 claims
- Omeprazole320 claims
- Losartan Potassium264 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: $40.95
2 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Clinical Care Associates OF The University OF Pennsylvania Health.West Chester, PA
- Novacare Outpatient Rehabilitation East, Inc.Collegeville, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John R. Walsh among 7,300 internal medicine physician records in Pennsylvania
John R. Walsh, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1988 · median 2008 among the 4,208 with a school on file
- Record last updated2025 · 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).
57 internal medicine physician records list a practice address in West Chester
They are 57 of the 2,831 NPPES records with a practice address in West Chester, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in West Chester → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anne Bowen, M.D.West Chester, PA 193821619967635
- Thomas Burgoon, M.D.West Chester, PA 193821184941452
- Ronald Fronduti, MDWest Chester, PA 193821568494847
- Sonia Ignatius, MDWest Chester, PA 193821710269683
- Lisa Johnson, M.D.West Chester, PA 193821740279843
- Shabih Khan, MDWest Chester, PA 193821578571063
- Mark Lasorda, DOWest Chester, PA 193821871913954
- Rama Mandapati, MDWest Chester, PA 193821710178074
Common questions
What is John R. Walsh, DO's NPI number?
John R. Walsh, DO's National Provider Identifier (NPI) is 1649271180, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John R. Walsh, DO located?
The NPPES record lists a practice address at 210 Willowbrook LN, West Chester, PA, 19382. Phone: (610) 696-8900. Providers update this record themselves, so call before visiting.
How can I verify John R. Walsh, DO's license?
NPPES lists Pennsylvania license number OS006953L, 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 John R. Walsh, DO prescribe under Medicare Part D?
In 2024, John R. Walsh, DO had 10,991 Medicare Part D claims for 964 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.