Roy W. Warren, DO
Family Medicine Physician · Johnstown, PA
Roy W. Warren, DO is a family medicine physician with a practice address in Johnstown, Pennsylvania, and NPI 1962495390, issued on Aug 31, 2005. Check the license (Pennsylvania OS002899L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Roy W. Warren
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OS002899L PA
Self-reported in NPPES; status is on the state search - Practice location
- 318 Goucher St, Johnstown, PA 15905
- Phone
- (814) 288-4488
- Enumerated
- Aug 31, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (814) 288-4485
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Verify Roy W. Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS002899LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average family medicine physician in 2024
338 Medicare Part D claims for 15 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium39 claims
- Lactulose29 claims
- Scopolamine25 claims
- Atorvastatin Calcium24 claims
- Baclofen22 claims
- Mupirocin16 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.
Roy W. Warren among 7,483 family medicine physician records in Pennsylvania
Roy W. Warren, DO is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% 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, 88% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
86 family medicine physician records list a practice address in Johnstown
They are 86 of the 1,724 NPPES records with a practice address in Johnstown, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Johnstown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Dennis Glover, M.D.Johnstown, PA 159051578562344
- Lynn Johnston, MDJohnstown, PA 159051114922564
- Richard Kastelic, MDJohnstown, PA 159051548265986
- David Lawless, MDJohnstown, PA 159051194786681
- Mark Malicki, MDJohnstown, PA 159051083619209
- Jessica Masser, D.O.Johnstown, PA 159051386842839
- James McKendree, MDJohnstown, PA 159051992700504
- Yasmin Siddiqi, MDJohnstown, PA 159051639296387
Common questions
What is Roy W. Warren, DO's NPI number?
Roy W. Warren, DO's National Provider Identifier (NPI) is 1962495390, issued on Aug 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Roy W. Warren, DO located?
The NPPES record lists a practice address at 318 Goucher St, Johnstown, PA, 15905. Phone: (814) 288-4488. Providers update this record themselves, so call before visiting.
How can I verify Roy W. Warren, DO's license?
NPPES lists Pennsylvania license number OS002899L, 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 Roy W. Warren, DO prescribe under Medicare Part D?
In 2024, Roy W. Warren, DO had 338 Medicare Part D claims for 15 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.