JENNIFER MATHISEN MAHER NP
NPI 1396009643
Nurse Practitioner - Acute Care in Winchester, MA
About Jennifer Mathisen Maher Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JENNIFER MATHISEN MAHER NP (NPI 1396009643) is an individual acute care provider in Winchester, Massachusetts, licensed in Massachusetts (234115) and active in the NPI registry since July 2012. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (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
Jennifer Mathisen Maher Np 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 Jennifer Maher reassigns Medicare billing to 2 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
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01890 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Jennifer Maher's NPI number?
The NPI number for Jennifer Maher is 1396009643. It was assigned to this individual provider in the NPPES registry on July 2, 2012.
Where is Jennifer Maher located?
Jennifer Maher practices at 165 High St, Winchester, MA 01890. The listed phone number is (617) 448-1966.
What is Jennifer Maher's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Jennifer Maher enrolled in Medicare?
Yes. Jennifer Maher 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 Jennifer Maher's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Maher reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, MA). 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 Jennifer Maher's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jennifer Maher accept?
Health plans from Taro Health list Jennifer Maher 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 Jennifer Maher affiliated with any hospitals?
According to CMS data, Jennifer Maher is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Jennifer Maher was last updated on April 28, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Jennifer Mathisen Maher, NP · NPI 1396009643
Acute Care physician in Winchester, Massachusetts. Individual provider, active in the CMS NPPES registry since July 2, 2012.
## Identity
- **NPI:** 1396009643 (Entity type: Individual)
- **Enumerated:** July 2, 2012
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 234115 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 165 HIGH ST, Winchester, MA 01890-3336
- **Phone:** (617) 448-1966
## 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): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** April 28, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1396009643) · Data from the CMS NPPES public registry.