Constantine Yiachos, M.D.
Gastroenterology Physician · Staten Island, NY
Constantine Yiachos, M.D. is a gastroenterology physician with a practice address in Staten Island, New York, and NPI 1063588127, issued on Nov 28, 2006. Check the license (New York 172409, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Constantine Yiachos
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 172409 NY
Self-reported in NPPES; status is on the state search - Practice location
- 129 Slosson Ave, Staten Island, NY 10314
- Phone
- (718) 720-5928
- Enumerated
- Nov 28, 2006
- Record last updated
- Nov 16, 2023
- Fax
- (718) 720-6706
- Medicare enrollment
- Enrolled (PECOS I20081015000408); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 1985
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Also registered at 129 Slosson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Kalman, M.D.Specialist1881767879
- Lawrence Wine, MDAnesthesiology Physician1114925013
Verify Constantine Yiachos 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 172409Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,792 Medicare Part D claims for 530 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Famotidine549 claims
- Omeprazole318 claims
- Pantoprazole Sodium258 claims
- Dicyclomine Hcl116 claims
- Ursodiol57 claims
- Sucralfate44 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: $309.01
11 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Icahn School OF Medicine AT Mount SinaiStaten Island, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Constantine Yiachos among 1,797 gastroenterology physician records in New York
Constantine Yiachos, M.D. is one of 1,797 gastroenterology physician records with a practice address in New York. 88% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 44% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1985 · median 1999 among the 1,378 with a school on file
- Record last updated2023 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in New York
There are 1,797 gastroenterology physician records in New York.
All 1,797 in New York → Every provider in Staten Island → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Wallen Chan, M.D.Staten Island, NY 103141043287857
- Richard Fazio, M.D.Staten Island, NY 103141285601419
- Elias Purow, M.D.Staten Island, NY 103141306934807
- Vahe Shahnazarian, M.D.Staten Island, NY 103141265770085
- Jeffrey Shaps, MDStaten Island, NY 103141467566497
- Magda Daoud, M.D.Staten Island, NY 103121992051635
- Sherif Farag, MDStaten Island, NY 103121861467250
- Sunil Patel, M.D.Staten Island, NY 103121588721658
Common questions
What is Constantine Yiachos, M.D.'s NPI number?
Constantine Yiachos, M.D.'s National Provider Identifier (NPI) is 1063588127, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Constantine Yiachos, M.D. located?
The NPPES record lists a practice address at 129 Slosson Ave, Staten Island, NY, 10314. Phone: (718) 720-5928. Providers update this record themselves, so call before visiting.
How can I verify Constantine Yiachos, M.D.'s license?
NPPES lists New York license number 172409, 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 Constantine Yiachos, M.D. prescribe under Medicare Part D?
In 2024, Constantine Yiachos, M.D. had 1,792 Medicare Part D claims for 530 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.