William Cihak, MD
Internal Medicine Physician · Olean, NY
William Cihak, MD is an internal medicine physician with a practice address in Olean, New York, and NPI 1386643781, issued on Jul 18, 2005. Check the license (New York 216007, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- William Cihak
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 216007 NY
Self-reported in NPPES; status is on the state search - Practice location
- 535 Main St, Olean, NY 14760
- Phone
- (716) 372-0141
- Enumerated
- Jul 18, 2005
- Entity
- Type 1 · individual
Also registered at 535 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Balacki, M.D.Gastroenterology Physician1578562179
- Neha Bansal, M.D.Endocrinology, Diabetes & Metabolism Physician1003152174
- Phyllis Bessey, NPNurse Practitioner1023003399
- Kelly Blackmon, NPAdult Health Nurse Practitioner1346471851
Verify William Cihak 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 216007Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
7.2 times the Medicare Part D claims of the average internal medicine physician in 2024
19,939 Medicare Part D claims for 1,174 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 616 claims were for opioids.
Most prescribed
- Levothyroxine Sodium1,037 claims
- Atorvastatin Calcium1,005 claims
- Amlodipine Besylate799 claims
- Lisinopril777 claims
- Metoprolol Succinate568 claims
- Rosuvastatin Calcium528 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: $515.16
27 payments, mostly food and beverage; the largest payer was GlaxoSmithKline, LLC.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
One hospital or facility affiliation
- Olean Medical Practice PLLCEllicottville, NY
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
14 internal medicine physician records list a Olean practice address
They are 14 of the 675 NPPES records with a Olean practice address, and 13,725 internal medicine physician records in New York.
All 14 in Olean → All 13,725 in New York → Every provider in Olean →
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
- Justin Aaron, MDNew York, NY1619243912
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Theophine Abakporo, M.D.Brooklyn, NY1972564813
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Charles Abate, MDOssining, NY1720180003
- Vyachislav Abayev, M.D.Brooklyn, NY1437394574
Common questions
What is William Cihak, MD's NPI number?
William Cihak, MD's National Provider Identifier (NPI) is 1386643781, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Cihak, MD located?
The NPPES record lists a practice address at 535 Main St, Olean, NY, 14760. Phone: (716) 372-0141. Providers update this record themselves, so call before visiting.
How can I verify William Cihak, MD's license?
NPPES lists New York license number 216007, 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 Cihak, MD prescribe under Medicare Part D?
In 2024, William Cihak, MD had 19,939 Medicare Part D claims for 1,174 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.