Active NPI
Mary Elizabeth Neill, D.D.S., M.S.
- Periodontics
- Washington, DC
National Provider Identifier
1326045790
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Periodontics
- License
- DEN1000086
- Practice address
- 2311 M St NW
Ste 500
Washington, DC 20037-1495 - Phone
- (202) 296-3360
- NPI assigned
- Jun 30, 2005
- 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 |
|---|---|---|---|---|
| Periodontics | 1223P0300X | DEN1000086 | DC | Primary |
Addresses
Primary practice location
2311 M St NW
Ste 500
Washington, DC 20037-1495
Mailing address
1701 Woodlore Rd
Annapolis, MD 21401-6569
Phone (301) 233-1297
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
- Credentials
- Master of Science
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| DEN1000086 | DC | MD | Periodontist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1120089600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1326045790",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1701 WOODLORE RD",
"city": "ANNAPOLIS",
"state": "MD",
"postal_code": "214016569",
"telephone_number": "301-233-1297"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2311 M ST NW",
"address_2": "STE 500",
"city": "WASHINGTON",
"state": "DC",
"postal_code": "200371495",
"telephone_number": "202-296-3360"
}
],
"practiceLocations": [],
"basic": {
"last_name": "NEILL",
"first_name": "MARY",
"middle_name": "ELIZABETH",
"name_prefix": "Dr.",
"credential": "D.D.S., M.S.",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2005-06-30",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "1223P0300X",
"taxonomy_group": "",
"desc": "Dentist, Periodontics",
"state": "DC",
"license": "DEN1000086",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Washington, DC
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.