SEAN M. O'HARA MD
NPI 1023429370
Emergency Medicine in Boston, MA
About Sean M. O'hara Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SEAN M. O'HARA MD (NPI 1023429370) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (290969) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS, is affiliated with Lawrence General Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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
Sean M. O'hara 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
8Medicare enrollment records show Sean O'hara reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 994 clinicians in this Medicare group
Lawrence, MA 01841
- Reassigned Medicare billing, Massachusetts enrollment
- 305 clinicians in this Medicare group
Lawrence, MA 01841
- Reassigned Medicare billing, Massachusetts enrollment
- 258 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 206 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,338 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,439 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.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lawrence General Hospital
Acute Care Hospitals · Lawrence, MANorth Shore Medical Center -
Acute Care Hospitals · Salem, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Sean O'hara's NPI number?
The NPI number for Sean O'hara is 1023429370. It was assigned to this individual provider in the NPPES registry on May 8, 2014.
Where is Sean O'hara located?
Sean O'hara practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-3936.
What is Sean O'hara's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Sean O'hara enrolled in Medicare?
Yes. Sean O'hara 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 Sean O'hara's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sean O'hara reassigns Medicare benefits to 8 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, MA), Community Medical Associates, Inc. (Lawrence, MA), Lawrence General Hospital (Lawrence, MA) and 3 more organizations, listed in the Medicare section above. 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 Sean O'hara's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sean O'hara accept?
Health plans from Blue Cross and Blue Shield of Texas and Taro Health list Sean O'hara 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 Sean O'hara affiliated with any hospitals?
According to CMS data, Sean O'hara is affiliated with Lawrence General Hospital, North Shore Medical Center - and Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Sean O'hara was last updated on August 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Sean M. O'hara, MD · NPI 1023429370
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 8, 2014.
## Identity
- **NPI:** 1023429370 (Entity type: Individual)
- **Enumerated:** May 8, 2014
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 290969 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2696
- **Phone:** (617) 726-3936
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Mass General Brigham Medical Group Northern Massachusetts Inc (NPI 1588606123, Salem, MA); Community Medical Associates, Inc. (NPI 1144544040, Lawrence, MA); Lawrence General Hospital (NPI 1477790152, Lawrence, MA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Temple University School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** August 26, 2024
- **Other identifiers:** Medicaid 110186639A (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1023429370) · Data from the CMS NPPES public registry.