DR. JOHN ARISTOTLE DAMIANOS MD
NPI 1265061444
Internal Medicine - Gastroenterology in Cleveland, OH
About Dr. John Aristotle Damianos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN ARISTOTLE DAMIANOS MD (NPI 1265061444) is an individual gastroenterology provider in Cleveland, Ohio, licensed in Ohio (35.156116) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Aristotle Damianos Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Damianos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cleveland, OH 44195
- Reassigned Medicare billing, Ohio enrollment
- 7,608 clinicians in this Medicare group
Rochester, MN 55905
- Reassigned Medicare billing, Minnesota enrollment
- 6,534 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic Hospital Rochester
Acute Care Hospitals · Rochester, MNCleveland Clinic
Acute Care Hospitals · Cleveland, OHMayo Clinic Health System-Franciscan Medical Center Inc
Acute Care Hospitals · La Crosse, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 44195 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CLEVELAND, OH 44195
CLEVELAND, OH 44195
CLEVELAND, OH 44195
CLEVELAND, OH 44195
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Damianos's NPI number?
The NPI number for John Damianos is 1265061444. It was assigned to this individual provider in the NPPES registry on April 8, 2020.
Where is John Damianos located?
John Damianos practices at 9500 Euclid Ave, Cleveland, OH 44195. The listed phone number is (216) 444-2200.
What is John Damianos's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is John Damianos enrolled in Medicare?
Yes. John Damianos is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Damianos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Damianos reassigns Medicare benefits to 2 organizations: The Cleveland Clinic Foundation (Cleveland, OH) and Mayo Clinic (Rochester, MN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Damianos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Damianos accept?
Health plans from Anthem Blue Cross and Blue Shield and Oscar Insurance Corporation of Ohio list John Damianos as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Damianos affiliated with any hospitals?
According to CMS data, John Damianos is affiliated with Mayo Clinic Hospital Rochester, Cleveland Clinic and Mayo Clinic Health System-Franciscan Medical Center Inc.
When was this NPI record last updated?
The NPPES record for John Damianos was last updated on July 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Aristotle Damianos, MD · NPI 1265061444
Gastroenterology physician in Cleveland, Ohio. Individual provider, active in the CMS NPPES registry since April 8, 2020.
## Identity
- **NPI:** 1265061444 (Entity type: Individual)
- **Enumerated:** April 8, 2020
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 35.156116 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 9500 EUCLID AVE, Cleveland, OH 44195-0001
- **Phone:** (216) 444-2200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): The Cleveland Clinic Foundation (NPI 1679525919, Cleveland, OH); Mayo Clinic (NPI 1114343860, Rochester, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Geisel School Of Medicine At Dartmouth, class of 2020
## Record status
- **NPPES last updated:** July 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1265061444) · Data from the CMS NPPES public registry.