William J. Kornrich, MD
Internal Medicine Physician · Riverhead, NY
William J. Kornrich, MD is an internal medicine physician with a practice address in Riverhead, New York, and NPI 1144332198, issued on Aug 31, 2006. Check the license (New York 182977, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- William J. Kornrich
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 182977 NY
Self-reported in NPPES; status is on the state search - Practice location
- 887 Old Country RD, Riverhead, NY 11901
- Phone
- (631) 727-6122
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (631) 727-2672
- Medicaid ID
- 01265916 NY
- Medicare enrollment
- Enrolled (PECOS I20110831000280); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 887 Old Country RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Abrams, LCSWClinical Social Worker1457431173
- Kathleen Brown, A-NPAdult Health Nurse Practitioner1689910929
- Veronica Cea, M.S. CCC/SLPSpeech-Language Pathologist1578511259
- Elizabeth Doroski, D.D.S.General Practice Dentistry1043440027
- Gregory Doroski, DMDGeneral Practice Dentistry1407911845
- Joseph Duva, MDGastroenterology Physician1992817977
Verify William J. Kornrich 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 182977Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average internal medicine physician in 2024
7,270 Medicare Part D claims for 847 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.
Most prescribed
- Atorvastatin Calcium379 claims
- Levothyroxine Sodium323 claims
- Amlodipine Besylate294 claims
- Losartan Potassium284 claims
- Omeprazole239 claims
- Rosuvastatin Calcium227 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): 84.5 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).
Industry payments in 2024: $50.58
2 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, 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 one group practice
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
16 internal medicine physician records list a practice address in Riverhead
They are 16 of the 982 NPPES records with a practice address in Riverhead, and 12,067 internal medicine physician records in New York.
All 16 in Riverhead → All 12,067 in New York → Every provider in Riverhead →
Other internal medicine physician records in New York
- Deborah Aanonsen, D.O.Staten Island, NY1952395717
- Nivedita Aanur, M.D.New York, NY1982833471
- Jay Aaron, MDGreat Neck, NY1245332956
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Zurab Abayev, M.D.Brooklyn, NY1841283058
- Ehab Abaza, MDNew York, NY1114507555
- Vaidarshi Abbagoni, MDNew York, NY1871237495
- Muhammad AbbasRichmond Hill, NY1053996587
Common questions
What is William J. Kornrich, MD's NPI number?
William J. Kornrich, MD's National Provider Identifier (NPI) is 1144332198, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Kornrich, MD located?
The NPPES record lists a practice address at 887 Old Country RD, Riverhead, NY, 11901. Phone: (631) 727-6122. Providers update this record themselves, so call before visiting.
How can I verify William J. Kornrich, MD's license?
NPPES lists New York license number 182977, 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 William J. Kornrich, MD prescribe under Medicare Part D?
In 2024, William J. Kornrich, MD had 7,270 Medicare Part D claims for 847 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William J. Kornrich, MD's MIPS final score?
The 2023 MIPS final score is 84.5 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.