Active NPI
Mary Michaelle Hennessey-Peirce, LCSW
- Addiction (Substance Use Disorder) Counselor
- Mesa, AZ
National Provider Identifier
1437237484
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Addiction (Substance Use Disorder) Counselor
- License
- 0579
- Practice address
- 7254 E Southern Ave
Suite #123
Mesa, AZ 85209 - Phone
- (602) 617-6595
- NPI assigned
- Nov 1, 2006
- Reactivated
- Nov 12, 2010
- Last updated
- Sep 11, 2025
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Addiction (Substance Use Disorder) Counselor | 101YA0400X | 0579 | AZ | Primary |
| Clinical Social Worker | 1041C0700X | 10373 | AZ |
Addresses
Primary practice location
7254 E Southern Ave
Suite #123
Mesa, AZ 85209
Mailing address
975 E Scott Ave
Gilbert, AZ 85234
Phone (480) 558-1065
Other names 1
- Miss Mary Michaelle Hennessey
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 10373 | AZ | MD | Clinical Social Worker |
| 0579 | AZ | MD | Foot Surgery Podiatrist |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Adult Mental Health Clinic/Center
- Mesa, AZ
- NPI 1386957645
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1162339200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1437237484",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "975 E SCOTT AVE",
"city": "GILBERT",
"state": "AZ",
"postal_code": "85234",
"telephone_number": "480-558-1065"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "7254 E SOUTHERN AVE",
"address_2": "SUITE #123",
"city": "MESA",
"state": "AZ",
"postal_code": "85209",
"telephone_number": "602-617-6595"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HENNESSEY-PEIRCE",
"first_name": "MARY",
"middle_name": "MICHAELLE",
"name_prefix": "Mrs.",
"credential": "LCSW",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2006-11-01",
"last_updated": "2025-09-11",
"deactivation_date": "2010-09-30",
"reactivation_date": "2010-11-12",
"status": "A"
},
"taxonomies": [
{
"code": "101YA0400X",
"taxonomy_group": "",
"desc": "Counselor, Addiction (Substance Use Disorder)",
"state": "AZ",
"license": "0579",
"primary": true
},
{
"code": "1041C0700X",
"taxonomy_group": "",
"desc": "Social Worker, Clinical",
"state": "AZ",
"license": "10373",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"first_name": "MARY",
"last_name": "HENNESSEY",
"middle_name": "MICHAELLE",
"prefix": "MISS",
"credential": "LCSW",
"code": "1",
"type": "Former Name"
}
]
}Other providers in Mesa, AZ
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.