MRS. MARY GUION BROCK FNP
NPI 1851773865
Nurse Practitioner - Family in West Hartford, CT
About Mrs. Mary Guion Brock Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MARY GUION BROCK FNP (NPI 1851773865) is an individual family provider in West Hartford, Connecticut, licensed in Connecticut (8190) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS.
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 (PECOS)
Mrs. Mary Guion Brock Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Brock reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Wethersfield, CT 06109
- Reassigned Medicare billing, Connecticut enrollment
- 747 clinicians in this Medicare group
Avon, CT 06001
- Reassigned Medicare billing, Connecticut enrollment
- 182 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06110 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 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST HARTFORD, CT 06110
WEST HARTFORD, CT 06110
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 Brock's NPI number?
The NPI number for Mary Brock is 1851773865. It was assigned to this individual provider in the NPPES registry on June 25, 2015.
Where is Mary Brock located?
Mary Brock practices at 445 S Main St, West Hartford, CT 06110. The listed phone number is (860) 696-2200.
What is Mary Brock's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Brock enrolled in Medicare?
Yes. Mary Brock is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Brock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Brock reassigns Medicare benefits to 2 organizations: Hartford Healthcare Medical Group, Inc (Wethersfield, CT) and Hartford Healthcare Urgent Care Centers, LLC (Avon, CT). 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 Mary Brock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Brock accept?
Health plans from Anthem Blue Cross and Blue Shield list Mary Brock 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 Mary Brock was last updated on September 19, 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.
# Mrs. Mary Guion Brock, FNP · NPI 1851773865
Family physician in West Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since June 25, 2015.
## Identity
- **NPI:** 1851773865 (Entity type: Individual)
- **Enumerated:** June 25, 2015
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 8190 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 445 S MAIN ST, West Hartford, CT 06110-1646
- **Phone:** (860) 696-2200 · **Fax:** (860) 561-0001
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Hartford Healthcare Medical Group, Inc (NPI 1043561301, Wethersfield, CT); Hartford Healthcare Urgent Care Centers, LLC (NPI 1093239683, Avon, CT) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 19, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1851773865) · Data from the CMS NPPES public registry.