MS. SHANNON MARIE O'BRIEN ANP
NPI 1750798625
Nurse Practitioner - Adult Health in Buffalo, NY
About Ms. Shannon Marie O'brien Anp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. SHANNON MARIE O'BRIEN ANP (NPI 1750798625) is an individual adult health provider in Buffalo, New York, licensed in New York (F306915-1) and active in the NPI registry since July 2014. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Of Buffalo, and is a graduate of Other (2014).
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
Ms. Shannon Marie O'brien Anp 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 Shannon O'brien reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Buffalo, NY 14220
- Reassigned Medicare billing, New York enrollment
- 499 clinicians in this Medicare group
Cheektowaga, NY 14225
- Reassigned Medicare billing, New York enrollment
- 515 clinicians in this Medicare group
Kenmore, NY 14217
- Reassigned Medicare billing, New York enrollment
- 271 clinicians in this Medicare group
East Amherst, NY 14051
- Reassigned Medicare billing, New York enrollment
- 7 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital Of Buffalo
Acute Care Hospitals · Buffalo, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14220 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.
BUFFALO, NY 14220
BUFFALO, NY 14220
BUFFALO, NY 14220
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 Shannon O'brien's NPI number?
The NPI number for Shannon O'brien is 1750798625. It was assigned to this individual provider in the NPPES registry on July 12, 2014.
Where is Shannon O'brien located?
Shannon O'brien practices at 515 Abbott Rd, Buffalo, NY 14220. The listed phone number is (716) 828-2478.
What is Shannon O'brien's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Shannon O'brien enrolled in Medicare?
Yes. Shannon O'brien 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 Shannon O'brien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Shannon O'brien reassigns Medicare benefits to 5 organizations: Mercy Hospital Of Buffalo (Buffalo, NY), Sisters Of Charity Hospital Of Buffalo New York (Cheektowaga, NY), Kenmore Mercy Hospital (Kenmore, NY), Buffalo Breathe Now Medical PC (East Amherst, 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 Shannon O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Shannon O'brien affiliated with any hospitals?
According to CMS data, Shannon O'brien is affiliated with Mercy Hospital Of Buffalo.
When was this NPI record last updated?
The NPPES record for Shannon O'brien was last updated on July 12, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.
# Ms. Shannon Marie O'brien, ANP · NPI 1750798625
Adult Health physician in Buffalo, New York. Individual provider, active in the CMS NPPES registry since July 12, 2014.
## Identity
- **NPI:** 1750798625 (Entity type: Individual)
- **Enumerated:** July 12, 2014
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** F306915-1 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 515 ABBOTT RD, Buffalo, NY 14220-1700
- **Phone:** (716) 828-2478
## 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): Mercy Hospital Of Buffalo (NPI 1659310605, Buffalo, NY); Sisters Of Charity Hospital Of Buffalo New York (NPI 1043455199, Cheektowaga, NY); Kenmore Mercy Hospital (NPI 1770598104, Kenmore, NY); Buffalo Breathe Now Medical PC (NPI 1285464479, East Amherst, 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 2014
## Record status
- **NPPES last updated:** July 12, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1750798625) · Data from the CMS NPPES public registry.