Active NPI
Chie Mitsui, LMHC
- Mental Health Counselor
- Boston, MA
National Provider Identifier
1073110128
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- Practice address
- 100 Cambridge St FL 14
Boston, MA 02114-2509 - Phone
- (646) 941-7645
- NPI assigned
- Oct 1, 2020
- 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | Primary |
Addresses
Primary practice location
100 Cambridge St FL 14
Boston, MA 02114-2509
Mailing address
100 Cambridge St FL 14
Boston, MA 02114-2509
Other names 1
- Mimi Mitsui
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)
- Not enrolled
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1601510400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1772236800000",
"number": "1073110128",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "100 CAMBRIDGE ST FL 14",
"city": "BOSTON",
"state": "MA",
"postal_code": "021142509"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "100 CAMBRIDGE ST FL 14",
"city": "BOSTON",
"state": "MA",
"postal_code": "021142509",
"telephone_number": "646-941-7645"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MITSUI",
"first_name": "CHIE",
"credential": "LMHC",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2020-10-01",
"last_updated": "2026-02-28",
"certification_date": "2026-02-28",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"first_name": "MIMI",
"last_name": "MITSUI",
"credential": "LMHC",
"code": "5",
"type": "Other Name"
}
]
}
Other providers in Boston, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.