RYAN ALEXANDER O'CONNOR MD
NPI 1477119949
Internal Medicine in Cheektowaga, NY
About Ryan Alexander O'connor Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RYAN ALEXANDER O'CONNOR MD (NPI 1477119949) is an individual internal medicine provider in Cheektowaga, New York, licensed in New York (314095) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, is affiliated with Kaleida Health, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
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
Ryan Alexander O'connor 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
5Medicare enrollment records show Ryan O'connor reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cheektowaga, NY 14225
- Reassigned Medicare billing, New York enrollment
- 515 clinicians in this Medicare group
Buffalo, NY 14220
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Mercy Hospital Of Buffalo
- 499 clinicians in this Medicare group
Williamsville, NY 14221
- Reassigned Medicare billing, New York enrollment
- 332 clinicians in this Medicare group
Kenmore, NY 14217
- Reassigned Medicare billing, New York enrollment
- 271 clinicians in this Medicare group
Lewiston, NY 14092
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Mount St. Marys Hospital Of Niagara Falls
- 289 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Kaleida Health
Acute Care Hospitals · Buffalo, NYSisters Of Charity Hospital
Acute Care Hospitals · Buffalo, NYKenmore Mercy Hospital
Acute Care Hospitals · Kenmore, NYMount St. Mary's Hospital & Health Center
Acute Care Hospitals · Lewiston, NYMercy Hospital Of Buffalo
Acute Care Hospitals · Buffalo, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14227 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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHEEKTOWAGA, NY 14227
CHEEKTOWAGA, NY 14227
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 Ryan O'connor's NPI number?
The NPI number for Ryan O'connor is 1477119949. It was assigned to this individual provider in the NPPES registry on May 10, 2019.
Where is Ryan O'connor located?
Ryan O'connor practices at 3091 William St, Cheektowaga, NY 14227. The listed phone number is (716) 822-3098.
What is Ryan O'connor's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ryan O'connor enrolled in Medicare?
Yes. Ryan O'connor 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 Ryan O'connor's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan O'connor reassigns Medicare benefits to 5 organizations: Sisters Of Charity Hospital Of Buffalo New York (Cheektowaga, NY), Chs Neuroscience Group (Buffalo, NY), Trinity Medical Wny PC (Williamsville, NY), Kenmore Mercy Hospital (Kenmore, NY) and Mount St. Mary's Hospital Of Niagara Falls (Lewiston, NY). 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 Ryan O'connor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ryan O'connor affiliated with any hospitals?
According to CMS data, Ryan O'connor is affiliated with Kaleida Health, Sisters Of Charity Hospital, Kenmore Mercy Hospital, Mount St. Mary's Hospital & Health Center and Mercy Hospital Of Buffalo.
When was this NPI record last updated?
The NPPES record for Ryan O'connor was last updated on August 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Ryan Alexander O'connor, MD · NPI 1477119949
Internal Medicine physician in Cheektowaga, New York. Individual provider, active in the CMS NPPES registry since May 10, 2019.
## Identity
- **NPI:** 1477119949 (Entity type: Individual)
- **Enumerated:** May 10, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 314095 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 3091 WILLIAM ST, Cheektowaga, NY 14227-1919
- **Phone:** (716) 822-3098
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Sisters Of Charity Hospital Of Buffalo New York (NPI 1043455199, Cheektowaga, NY); Chs Neuroscience Group (NPI 1972883304, Buffalo, NY); Trinity Medical Wny PC (NPI 1144878893, Williamsville, NY); Kenmore Mercy Hospital (NPI 1770598104, Kenmore, NY); Mount St. Mary's Hospital Of Niagara Falls (NPI 1043394745, Lewiston, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** August 13, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1477119949) · Data from the CMS NPPES public registry.