Joshua Owczarczak
Internal Medicine Physician · Buffalo, NY
Joshua Owczarczak is an internal medicine physician with a practice address in Buffalo, New York, and NPI 1245818939, issued on Apr 1, 2021. Check the license (New York 333560, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Joshua Owczarczak
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 333560 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Main St FL 4, Buffalo, NY 14203
- Phone
- (716) 550-8361
- Enumerated
- Apr 1, 2021
- Record last updated
- Nov 10, 2025
- Fax
- (716) 323-0585
- Medicare enrollment
- Enrolled (PECOS I20250825001384); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 1001 Main St FL 4
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joshua Owczarczak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 333560Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
248 Medicare Part D claims for 47 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Atorvastatin Calcium26 claims
- Jardiance22 claims
- Albuterol Sulfate Hfa19 claims
- Carvedilol13 claims
- Hydrochlorothiazide13 claims
- Citalopram Hbr12 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.
2 hospitals and group practices
- Kaleida HealthBuffalo, NY · Acute Care Hospitals3 of 5 stars
- UB Family Medicine IncBuffalo, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Joshua Owczarczak among 12,067 internal medicine physician records in New York
Joshua Owczarczak is one of 12,067 internal medicine physician records with a practice address in New York. 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 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2002 among the 7,221 with a school on file
- Record last updated2025 · 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 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
293 internal medicine physician records list a practice address in Buffalo
They are 293 of the 13,287 NPPES records with a practice address in Buffalo, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Buffalo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Richard Charles, M.D.Buffalo, NY 142031588629216
- Donald Miller, MDBuffalo, NY 142031225096282
- Matthew O Brien, MDBuffalo, NY 142031972551430
Common questions
What is Joshua Owczarczak's NPI number?
Joshua Owczarczak's National Provider Identifier (NPI) is 1245818939, issued on Apr 1, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Owczarczak located?
The NPPES record lists a practice address at 1001 Main St FL 4, Buffalo, NY, 14203. Phone: (716) 550-8361. Providers update this record themselves, so call before visiting.
How can I verify Joshua Owczarczak's license?
NPPES lists New York license number 333560, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joshua Owczarczak prescribe under Medicare Part D?
In 2024, Joshua Owczarczak had 248 Medicare Part D claims for 47 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.