MARK I JACOBS MD
NPI 1487638409
Internal Medicine - Cardiovascular Disease in Willimantic, CT
About Mark I Jacobs Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK I JACOBS MD (NPI 1487638409) is an individual cardiovascular disease provider in Willimantic, Connecticut, licensed in New Hampshire (9159) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Biddeford, and is a graduate of University Of Connecticut School Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Mark I Jacobs 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
3Medicare enrollment records show Mark Jacobs reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 1,921 clinicians in this Medicare group
Hyannis, MA 02601
- Reassigned Medicare billing, Massachusetts enrollment
- 423 clinicians in this Medicare group
Dover, NH 03820
- Reassigned Medicare billing, New Hampshire enrollment
- 559 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 11
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 06226 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 4
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 Mark Jacobs's NPI number?
The NPI number for Mark Jacobs is 1487638409. It was assigned to this individual provider in the NPPES registry on December 2, 2005.
Where is Mark Jacobs located?
Mark Jacobs practices at 5 Founders St Ste 102, Willimantic, CT 06226. The listed phone number is (860) 456-2898.
What is Mark Jacobs's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Mark Jacobs enrolled in Medicare?
Yes. Mark Jacobs 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 Mark Jacobs's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Jacobs reassigns Medicare benefits to 3 organizations: Hartford Healthcare Medical Group Specialists, PLLC (Hartford, CT), Medical Affiliates Of Cape Cod, Inc. (Hyannis, MA) and Wentworth Douglass Physician Corporation (Dover, NH). 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 Mark Jacobs's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Jacobs accept?
Health plans from Taro Health list Mark Jacobs 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.
When was this NPI record last updated?
The NPPES record for Mark Jacobs was last updated on August 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mark I Jacobs, MD · NPI 1487638409
Cardiovascular Disease physician in Willimantic, Connecticut. Individual provider, active in the CMS NPPES registry since December 2, 2005.
## Identity
- **NPI:** 1487638409 (Entity type: Individual)
- **Enumerated:** December 2, 2005
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 9159 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 5 FOUNDERS ST STE 102, Willimantic, CT 06226-2050
- **Phone:** (860) 456-2898
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Hartford Healthcare Medical Group Specialists, PLLC (NPI 1023584216, Hartford, CT); Medical Affiliates Of Cape Cod, Inc. (NPI 1770534927, Hyannis, MA); Wentworth Douglass Physician Corporation (NPI 1336751825, Dover, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 1981
## Record status
- **NPPES last updated:** August 1, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1487638409) · Data from the CMS NPPES public registry.