Active NPI
Mark Edward Tilyou, M.D.
- Legal Medicine
- Altoona, PA
National Provider Identifier
1164420717
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Legal Medicine
- License
- MD023252
- Practice address
- 222 Chestnut Ave
Altoona, PA 16601-4928 - Phone
- (814) 946-8046
- Fax
- (814) 946-3693
- NPI assigned
- Jul 8, 2005
- 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Legal Medicine | 173000000X | MD023252 | PA | Primary |
Addresses
Primary practice location
222 Chestnut Ave
Altoona, PA 16601-4928
Mailing address
222 Chestnut Ave
Altoona, PA 16601-4928
Phone (814) 946-8046
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1009212900001 | Medicaid | PA |
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| MD023252 | PA | MD | Legal Medicine |
| 14902 | LA | MD | Pharmacist |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Windber Hospital, Inc. | Past | Accepting new patients |
Interoperability endpoints
- mtilyou@directaddress.net
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 and National Provider Directory roles.
-
- General Acute Care Hospital
- Windber, PA
- NPI 1275620536
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1120780800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1164420717",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "222 CHESTNUT AVE",
"city": "ALTOONA",
"state": "PA",
"postal_code": "166014928",
"telephone_number": "814-946-8046",
"fax_number": "814-946-3693"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "222 CHESTNUT AVE",
"city": "ALTOONA",
"state": "PA",
"postal_code": "166014928",
"telephone_number": "814-946-8046",
"fax_number": "814-946-3693"
}
],
"practiceLocations": [],
"basic": {
"last_name": "TILYOU",
"first_name": "MARK",
"middle_name": "EDWARD",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-07-08",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "173000000X",
"taxonomy_group": "",
"desc": "Legal Medicine",
"state": "PA",
"license": "MD023252",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "1009212900001",
"state": "PA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Altoona, PA
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.