PATRICK W. O'BRIEN PA-C
NPI 1134577141
Physician Assistant - Surgical in Springfield, MA
About Patrick W. O'brien Pa-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PATRICK W. O'BRIEN PA-C (NPI 1134577141) is an individual surgical provider in Springfield, Massachusetts and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Ctr, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Patrick W. O'brien Pa-c 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Ctr
Acute Care Hospitals · Springfield, MAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Patrick O'brien's NPI number?
The NPI number for Patrick O'brien is 1134577141. It was assigned to this individual provider in the NPPES registry on May 31, 2016.
Where is Patrick O'brien located?
Patrick O'brien practices at 271 Carew St, Springfield, MA 01104. The listed phone number is (413) 748-7353.
What is Patrick O'brien's specialty?
The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.
Is Patrick O'brien enrolled in Medicare?
Yes. Patrick 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.
What insurance does Patrick O'brien accept?
Health plans from Anthem Blue Cross and Blue Shield list Patrick O'brien 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 Patrick O'brien affiliated with any hospitals?
According to CMS data, Patrick O'brien is affiliated with Mercy Medical Ctr.
When was this NPI record last updated?
The NPPES record for Patrick O'brien was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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.
# Patrick W. O'brien, PA-C · NPI 1134577141
Surgical physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since May 31, 2016.
## Identity
- **NPI:** 1134577141 (Entity type: Individual)
- **Enumerated:** May 31, 2016
- **Primary specialty:** Physician Assistant - Surgical · taxonomy 363AS0400X
- **Sole proprietor:** No
## Practice location
- **Address:** 271 CAREW ST, Springfield, MA 01104-2377
- **Phone:** (413) 748-7353
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** July 31, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1134577141) · Data from the CMS NPPES public registry.