Active NPI
Matthew Mackos, CRNA
- Certified Registered Nurse Anesthetist
- Concord, MA
National Provider Identifier
1912838327
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Certified Registered Nurse Anesthetist
- License
- RN2325630
- Practice address
- 133 Old Road to 9 Acre Cor
Concord, MA 01742-4159 - Phone
- (978) 369-1400
- NPI assigned
- May 26, 2026
- Sex
- Male
- 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 |
|---|---|---|---|---|
| Certified Registered Nurse Anesthetist | 367500000X | RN2325630 | MA | Primary |
| Registered Nurse | 163W00000X | RN2325630 | MA |
Addresses
Primary practice location
133 Old Road to 9 Acre Cor
Concord, MA 01742-4159
Mailing address
6 Powdermill Rd Apt 6332
Acton, MA 01720-5972
Phone (978) 319-3543
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
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| RN2325630 | MA | MD | Registered Nurse |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1779753600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1781568000000",
"number": "1912838327",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "6 POWDERMILL RD APT 6332",
"city": "ACTON",
"state": "MA",
"postal_code": "017205972",
"telephone_number": "978-319-3543"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "133 OLD ROAD TO 9 ACRE COR",
"city": "CONCORD",
"state": "MA",
"postal_code": "017424159",
"telephone_number": "978-369-1400"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MACKOS",
"first_name": "MATTHEW",
"credential": "CRNA",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2026-05-26",
"last_updated": "2026-06-16",
"certification_date": "2026-06-16",
"status": "A"
},
"taxonomies": [
{
"code": "367500000X",
"taxonomy_group": "",
"desc": "Nurse Anesthetist, Certified Registered",
"state": "MA",
"license": "RN2325630",
"primary": true
},
{
"code": "163W00000X",
"taxonomy_group": "",
"desc": "Registered Nurse",
"state": "MA",
"license": "RN2325630",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Concord, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 16, 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.