MR. RYAN J SULLIVAN M.D.
NPI 1477873412
Emergency Medicine in Weymouth, MA
About Mr. Ryan J Sullivan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. RYAN J SULLIVAN M.D. (NPI 1477873412) is an individual emergency medicine provider in Weymouth, Massachusetts, licensed in Massachusetts (254184) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with South Shore Hospital, and is a graduate of Tufts University School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses
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
Mr. Ryan J Sullivan M.d. 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
6Medicare enrollment records show Ryan Sullivan reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Weymouth, MA 02190
- Reassigned Medicare billing, Massachusetts enrollment
- 671 clinicians in this Medicare group
Brockton, MA 02302
- Reassigned Medicare billing, Massachusetts enrollment
- 81 clinicians in this Medicare group
Ayer, MA 01432
- Reassigned Medicare billing, Massachusetts enrollment
- 290 clinicians in this Medicare group
Littleton, NH 03561
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1265536718 (New Hampshire)
- 126 clinicians in this Medicare group
Berlin, NH 03570
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1679526644 (New Hampshire)
- 128 clinicians in this Medicare group
Colebrook, NH 03576
- Reassigned Medicare billing, New Hampshire enrollment
- 63 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 3
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
South Shore Hospital
Acute Care Hospitals · South Weymouth, MAUpper Connecticut Valley Hospital
Critical Access Hospitals · Colebrook, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02190 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SOUTH WEYMOUTH, MA 02190
SOUTH WEYMOUTH, MA 02190
SOUTH WEYMOUTH, MA 02190
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 Sullivan's NPI number?
The NPI number for Ryan Sullivan is 1477873412. It was assigned to this individual provider in the NPPES registry on June 1, 2010.
Where is Ryan Sullivan located?
Ryan Sullivan practices at 55 Fogg Road, Weymouth, MA 02190. The listed phone number is (781) 624-8000.
What is Ryan Sullivan's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Ryan Sullivan enrolled in Medicare?
Yes. Ryan Sullivan 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 Sullivan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Sullivan reassigns Medicare benefits to 6 organizations: Coastal Medical Associates (Weymouth, MA), Brockton Hospital, Inc. (Brockton, MA), Steward Emergency Physicians, Inc (Ayer, MA), Weeks Medical Center (Littleton, NH), Androscoggin Valley Hospital, Inc. (Berlin, NH) and 1 more organization, 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 Ryan Sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ryan Sullivan accept?
Health plans from Taro Health list Ryan Sullivan 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 Ryan Sullivan affiliated with any hospitals?
According to CMS data, Ryan Sullivan is affiliated with South Shore Hospital and Upper Connecticut Valley Hospital.
When was this NPI record last updated?
The NPPES record for Ryan Sullivan was last updated on June 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mr. Ryan J Sullivan, M.D. · NPI 1477873412
Emergency Medicine physician in Weymouth, Massachusetts. Individual provider, active in the CMS NPPES registry since June 1, 2010.
## Identity
- **NPI:** 1477873412 (Entity type: Individual)
- **Enumerated:** June 1, 2010
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 254184 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FOGG ROAD, Weymouth, MA 02190
- **Phone:** (781) 624-8000 · **Fax:** (781) 878-6750
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Coastal Medical Associates (NPI 1932175684, Weymouth, MA); Brockton Hospital, Inc. (NPI 1063431286, Brockton, MA); Steward Emergency Physicians, Inc (NPI 1780971275, Ayer, MA); Weeks Medical Center (NPI 1578155560, Littleton, NH); Androscoggin Valley Hospital, Inc. (NPI 1386680593, Berlin, NH); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** June 18, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1477873412) · Data from the CMS NPPES public registry.