MARY ANN HARMON APRN
NPI 1477044824
Nurse Practitioner in North Haven, CT
About Mary Ann Harmon Aprn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY ANN HARMON APRN (NPI 1477044824) is an individual nurse practitioner in North Haven, Connecticut, licensed in Connecticut (7265) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 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
Mary Ann Harmon Aprn 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 Reassignment
Medicare enrollment records show Mary Ann Harmon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hamden, CT 06514
- Reassigned Medicare billing, Connecticut enrollment
- 3,728 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
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 06473 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 9
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 Mary Ann Harmon's NPI number?
The NPI number for Mary Ann Harmon is 1477044824. It was assigned to this individual provider in the NPPES registry on May 22, 2018.
Where is Mary Ann Harmon located?
Mary Ann Harmon practices at 31 Broadway, North Haven, CT 06473. The listed phone number is (203) 234-7460.
What is Mary Ann Harmon's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Mary Ann Harmon enrolled in Medicare?
Yes. Mary Ann Harmon 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 organization bills Medicare for Mary Ann Harmon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ann Harmon reassigns Medicare benefits to Yale University (Hamden, CT). The 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 Mary Ann Harmon'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 Mary Ann Harmon was last updated on May 22, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Mary Ann Harmon, APRN · NPI 1477044824
Nurse Practitioner physician in North Haven, Connecticut. Individual provider, active in the CMS NPPES registry since May 22, 2018.
## Identity
- **NPI:** 1477044824 (Entity type: Individual)
- **Enumerated:** May 22, 2018
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 7265 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 31 BROADWAY, North Haven, CT 06473-2304
- **Phone:** (203) 234-7460 · **Fax:** (203) 239-3047
## 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:** Yale University (NPI 1134391824, Hamden, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** May 22, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1477044824) · Data from the CMS NPPES public registry.