Dr. Constantine Yiachos, MD
- Medicare services, 2024
- 761
- Medicare patients, 2024
- 572
- Part D claims, 2024
- 1,792
- Hospital affiliations
- 2
- Industry payments
- $7,694
- Practice address
- 1441 South Ave, Staten Island, NY 10314
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mount Sinai Staten Island Cancer - HOPD
Acute Care Hospital outpatient department · Staten Island, New York
Find Dr. Yiachos' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Constantine Yiachos is a gastroenterologist in Staten Island, New York
Dr. Yiachos practices at Mount Sinai Staten Island Cancer - HOPD in Staten Island, New York.
Dr. Yiachos' NPI, 1063588127, was assigned on November 28, 2006. Dr. Yiachos graduated from State University of New York Downstate Medical Center in 1985. Dr. Yiachos holds New York license 172409.
- NPI
- 1063588127NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264500354
- NPI enumeration date
- November 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Constantine Yiachos practices at Mount Sinai Staten Island Cancer - HOPD in Staten Island, New York
Dr. Yiachos' primary practice is Mount Sinai Staten Island Cancer - HOPD, at 1441 South Ave, Staten Island, NY 10314.
- Mount Sinai Staten Island Cancer - HOPD1441 South Ave, Staten Island, NY 10314
Source: Dmand AI Affiliation Data
Dr. Constantine Yiachos is affiliated with 4 sites of care and 2 medical groups
Dr. Yiachos' primary practice is Mount Sinai Staten Island Cancer - HOPD in Staten Island, New York. Dr. Yiachos is also affiliated with Staten Island University Hospital. The medical group on file is Amboy Medical Practice PC. Dmand AI also links Dr. Yiachos to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account. Dr. Yiachos' employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Constantine Yiachos' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yiachos practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Sinai Staten Island Cancer - HOPD | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Constantine Yiachos is one of 1,583 gastroenterologists in New York
Gastroenterology is Dr. Yiachos' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Yiachos is licensed in New York.
Specialties and state licenses
- Gastroenterology, New YorkPrimary
Gastroenterologists near Dr. Yiachos
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Constantine Yiachos billed Medicare for 761 services in 2024
CMS data shows 761 Medicare services from Dr. Yiachos across 10 procedure codes in 2024, for 572 Medicare patients. Medicare paid $93,412 for them.
Dr. Yiachos' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7292024: 59818%
- Surgery
- 2023: 2472024: 16334%
Where Dr. Yiachos' Medicare services took place, 2024
- In an office69091%
- In a facility719%
Dr. Yiachos compared with the New York median for gastroenterologists, 2024
- Dr. Yiachos
- New York median
- Medicare services
- 761vs 42181% above
- Medicare patients
- 572vs 2362.4 times
- Part D claims
- 1,632vs 3824.3 times
Medians across 1,551 gastroenterologists in New York with Dmand AI profiles that report each measure.
Dr. Yiachos' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Yiachos and other gastroenterologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Constantine Yiachos treated 572 Medicare patients in 2024, average age 72
CMS counts 572 Medicare patients who saw Dr. Yiachos in 2024. The largest group is 65 to 74, with 331 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 0.92, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Yiachos' median patient age at 65, with 51% women.
Dr. Yiachos' Medicare patients by age, 2024
Dr. Yiachos' Medicare patients by sex, 2024
- Women32356%
- Men24944%
Chronic conditions among Dr. Yiachos' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes52%
- Arthritis48%
- Ischemic heart disease32%
- Anxiety24%
- Cancer19%
- Chronic kidney disease16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Yiachos' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women51%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Constantine Yiachos wrote 1,792 Medicare Part D claims in 2024
In 2024, Dr. Yiachos wrote 1,792 Medicare Part D claims for 530 patients. 93% of them were for generic drugs. CMS names the drug for 1,632 of them, across 17 drugs with 11 or more claims each, at $93,329 in total drug cost. In 2023, CMS named 1,496 claims across 20 drugs.
Dr. Yiachos' Part D claims by kind of drug, 2024
- Generic1,665 claims93%
- Brand-name127 claims7%
Dr. Yiachos' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Yiachos' Part D claims, 2024
- Antibiotics4%72 of 1,792 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,4962024: 1,6329%
Drugs named by CMS: 17 in 2024, 20 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Constantine Yiachos ranks in the 89th percentile for colonoscopy in Medicare
Dr. Yiachos accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 153 procedures of colonoscopy by Dr. Yiachos, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Yiachos ranks in Medicare procedure volume
- Colonoscopy
- 89th percentile153 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 63rd percentile49 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Constantine Yiachos received $7,694 in industry payments from 2016 to 2025
CMS Open Payments shows 391 general payments to Dr. Yiachos from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Valeant Pharmaceuticals International paid the most, $1,066. It also lists 11 research payments totaling $1,587 in 2024, naming 1 clinical trial.
General payments to Dr. Yiachos by program year, 2016 to 2025
General payments to Dr. Yiachos by kind, 2016 to 2025
- Food and beverage$7,30995%
- Gifts$3855%
Companies that paid Dr. Yiachos the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Constantine Yiachos graduated from State University of New York Downstate Medical Center
Dr. Yiachos graduated from State University of New York Downstate Medical Center in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Constantine Yiachos's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Constantine Yiachos
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Constantine Yiachos' NPI number?
Dr. Constantine Yiachos' NPI number is 1063588127. It was assigned on November 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Constantine Yiachos?
Dr. Constantine Yiachos is a gastroenterologist in Staten Island, New York. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Constantine Yiachos practice?
Dr. Yiachos practices at 1441 South Ave, Staten Island, NY 10314. Dr. Yiachos' primary practice is Mount Sinai Staten Island Cancer - HOPD in Staten Island, New York. Dmand AI also links Dr. Yiachos to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Constantine Yiachos' medical license number?
Dr. Yiachos holds New York license 172409.
Which hospitals is Dr. Constantine Yiachos affiliated with?
Dr. Yiachos is affiliated with Staten Island University Hospital. Dmand AI links Dr. Yiachos to 1 more hospital.
What medical group is Dr. Constantine Yiachos part of?
Dr. Yiachos is linked to Amboy Medical Practice PC. Dmand AI links Dr. Yiachos to 1 more medical group.
Does Dr. Constantine Yiachos accept Medicare?
Yes. CMS data shows Dr. Yiachos billed Medicare for 761 services in 2024, and Dr. Yiachos accepts Medicare assignment.
How many Medicare patients does Dr. Constantine Yiachos see?
CMS counts 572 Medicare patients who saw Dr. Yiachos in 2024, with an average age of 72.
What services does Dr. Constantine Yiachos bill to Medicare?
In 2024, Dr. Yiachos' most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, new patient (99203).
Where did Dr. Constantine Yiachos go to medical school?
Dr. Yiachos graduated from State University of New York Downstate Medical Center in 1985.
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What drugs does Dr. Constantine Yiachos prescribe most?
In 2024 Medicare Part D data, Dr. Yiachos' most prescribed drugs by claims were Famotidine, Omeprazole and Pantoprazole Sodium.
Has Dr. Constantine Yiachos received payments from drug or device companies?
CMS Open Payments shows $7,694 in general payments to Dr. Yiachos from 27 companies from 2016 to 2025. The largest total came from Valeant Pharmaceuticals International.
How long has Dr. Constantine Yiachos been practicing?
Dr. Yiachos graduated from medical school in 1985, 41 years ago.
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