Thomas M. Koroscil, MD
Endocrinology, Diabetes & Metabolism Physician · Dayton, OH
Thomas M. Koroscil, MD is an endocrinology, diabetes & metabolism physician with a practice address in Dayton, Ohio, and NPI 1811953680, issued on Apr 21, 2006. Check the license (Ohio 35083507, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Thomas M. Koroscil
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 35083507 OH
Self-reported in NPPES; status is on the state search - Practice location
- 1222 S Patterson Blvd, Dayton, OH 45402
- Phone
- (937) 223-5350
- Enumerated
- Apr 21, 2006
- Record last updated
- Mar 13, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (937) 224-3112
- Medicaid ID
- 2492333 OH
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 352 in Ohio → Look up another NPI →
Also registered at 1222 S Patterson Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas M. Koroscil in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35083507Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,410 Medicare Part D claims for 296 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Levothyroxine Sodium463 claims
- Methimazole110 claims
- Synthroid73 claims
- Hydrocortisone62 claims
- Alendronate Sodium44 claims
- Calcitriol43 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 77 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Thomas M. Koroscil among 352 endocrinology, diabetes & metabolism physician records in Ohio
Thomas M. Koroscil, MD is one of 352 endocrinology, diabetes & metabolism physician records with a practice address in Ohio. 83% 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, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2014 · 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 207RE0101X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Ohio
There are 352 endocrinology, diabetes & metabolism physician records in Ohio.
All 352 in Ohio → Every provider in Dayton → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Ankur Gupta, MDDayton, OH 454021639367162
- Maher Al-Samkari, DODayton, OH 454091477746071
- Heidi Buckingham, MDOakwood, OH 454091295722635
- Rodney Stone, MDDayton, OH 454091649386764
- Susan Galbraith, MDDayton, OH 454291770565335
- Deepak Sarwal, M.D.Dayton, OH 454291235159559
- Trisha Zeidan, MDDayton, OH 454291679695985
- Richard Davis, MDBeavercreek, OH 454311093920514
Common questions
What is Thomas M. Koroscil, MD's NPI number?
Thomas M. Koroscil, MD's National Provider Identifier (NPI) is 1811953680, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas M. Koroscil, MD located?
The NPPES record lists a practice address at 1222 S Patterson Blvd, Dayton, OH, 45402. Phone: (937) 223-5350. Providers update this record themselves, so call before visiting.
How can I verify Thomas M. Koroscil, MD's license?
NPPES lists Ohio license number 35083507, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas M. Koroscil, MD prescribe under Medicare Part D?
In 2024, Thomas M. Koroscil, MD had 1,410 Medicare Part D claims for 296 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Thomas M. Koroscil, MD's MIPS final score?
The 2023 MIPS final score is 77 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.