Active NPI
Mary Helen Davis, MD
- Psychiatry Physician
- Lancaster, PA
National Provider Identifier
1346261831
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- MD054851L
- Practice address
- 822 Marietta Ave
Suite 31
Lancaster, PA 17603-3239 - Phone
- (717) 392-7062
- Fax
- (717) 392-5495
- NPI assigned
- Jul 21, 2006
- Last updated
- Sep 11, 2025
- Sex
- Female
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Psychiatry Physician | 2084P0800X | MD054851L | PA | Primary |
| Child & Adolescent Psychiatry Physician | 2084P0804X | MD054851L | PA |
Addresses
Primary practice location
822 Marietta Ave
Suite 31
Lancaster, PA 17603-3239
Mailing address
822 Marietta Ave
Suite 31
Lancaster, PA 17603-3239
Phone (717) 392-7062
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in PA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20160302002091 | PA | Order and Referring Only - Psychiatry | 9032415955 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Community Services Group, Inc. | Past | Accepting new patients |
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.
-
- Community/Behavioral Health Agency
- Mountville, PA
- NPI 1265426084
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1153440000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1346261831",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "822 MARIETTA AVE",
"address_2": "SUITE 31",
"city": "LANCASTER",
"state": "PA",
"postal_code": "176033239",
"telephone_number": "717-392-7062",
"fax_number": "717-392-5495"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "822 MARIETTA AVE",
"address_2": "SUITE 31",
"city": "LANCASTER",
"state": "PA",
"postal_code": "176033239",
"telephone_number": "717-392-7062",
"fax_number": "717-392-5495"
}
],
"practiceLocations": [],
"basic": {
"last_name": "DAVIS",
"first_name": "MARY",
"middle_name": "HELEN",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2006-07-21",
"last_updated": "2025-09-11",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "PA",
"license": "MD054851L",
"primary": true
},
{
"code": "2084P0804X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
"state": "PA",
"license": "MD054851L",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Lancaster, PA
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.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.