DR. JAMES FRANCIS SULLIVAN M.D.
NPI 1780679472
Internal Medicine in Mystic, CT
About Dr. James Francis Sullivan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES FRANCIS SULLIVAN M.D. (NPI 1780679472) is an individual internal medicine provider in Mystic, Connecticut, licensed in Connecticut (017250) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS and is a graduate of Yale University School Of Medicine (1973).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
Dr. James Francis 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
2Medicare enrollment records show James Sullivan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, MA 01151
- Reassigned Medicare billing, Connecticut enrollment
- Medicare enrollment name: Ipc Hospitalists Of New England PC
- 88 clinicians in this Medicare group
Baton Rouge, LA 70816
- Reassigned Medicare billing, Connecticut and Rhode Island enrollments
- 127 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06355 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.
Reported Quality Measures
Other Providers at the Same Location NPPES 7
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 James Sullivan's NPI number?
The NPI number for James Sullivan is 1780679472. It was assigned to this individual provider in the NPPES registry on September 19, 2005.
Where is James Sullivan located?
James Sullivan practices at 200 Sandy Hollow Rd, Mystic, CT 06355. The listed phone number is (860) 572-8911.
What is James Sullivan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is James Sullivan enrolled in Medicare?
Yes. James 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 James Sullivan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Sullivan reassigns Medicare benefits to 2 organizations: Ipc Hospitalists Of New England, P.C. (Springfield, MA) and Hospital Medicine Associates LLC (Baton Rouge, LA). 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 James Sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for James Sullivan was last updated on December 22, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Dr. James Francis Sullivan, M.D. · NPI 1780679472
Internal Medicine physician in Mystic, Connecticut. Individual provider, active in the CMS NPPES registry since September 19, 2005.
## Identity
- **NPI:** 1780679472 (Entity type: Individual)
- **Enumerated:** September 19, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 017250 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 SANDY HOLLOW RD, Mystic, CT 06355-1720
- **Phone:** (860) 572-8911 · **Fax:** (860) 572-7758
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Ipc Hospitalists Of New England, P.C. (NPI 1659555266, Springfield, MA); Hospital Medicine Associates LLC (NPI 1093758781, Baton Rouge, LA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 1973
## Record status
- **NPPES last updated:** December 22, 2009
- **Other identifiers:** Medicare UPIN D33504 (CT); Medicare PIN 490000057 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1780679472) · Data from the CMS NPPES public registry.