Active NPI
Catherine Day
- Psychologist
- Frederick, MD
National Provider Identifier
1699636720
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychologist
- License
- A01225
- Practice address
- 10 N Jefferson St Ste 203
Frederick, MD 21701-4865 - Phone
- (202) 750-1028
- NPI assigned
- Nov 19, 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Psychologist | 103T00000X | A01225 | MD | Primary |
Addresses
Primary practice location
10 N Jefferson St Ste 203
Frederick, MD 21701-4865
Mailing address
6010 Executive Blvd Unit 303
Rockville, MD 20852-3809
Phone (202) 750-1028
Other practice location 1
6010 Executive Blvd Unit 303
Rockville, MD 20852-3809
Phone (202) 750-1028 ext. 106
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 |
|---|---|---|---|
| A01225 | MD | MD | Psychologist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1763510400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1779408000000",
"number": "1699636720",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "6010 EXECUTIVE BLVD UNIT 303",
"city": "ROCKVILLE",
"state": "MD",
"postal_code": "208523809",
"telephone_number": "202-750-1028"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "10 N JEFFERSON ST STE 203",
"city": "FREDERICK",
"state": "MD",
"postal_code": "217014865",
"telephone_number": "202-750-1028"
}
],
"practiceLocations": [
{
"address_1": "6010 Executive Blvd Unit 303",
"address_purpose": "LOCATION",
"city": "Rockville",
"state": "MD",
"postal_code": "208523809",
"country_code": "US",
"telephone_number": "202-750-1028 x106",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "DAY",
"first_name": "CATHERINE",
"name_prefix": "Dr.",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2025-11-19",
"last_updated": "2026-05-22",
"certification_date": "2026-05-22",
"status": "A"
},
"taxonomies": [
{
"code": "103T00000X",
"taxonomy_group": "",
"desc": "Psychologist",
"state": "MD",
"license": "A01225",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Frederick, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 22, 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.