Active NPI
Michael James O'Day, D.O.
- Family Medicine Physician
- Saint Louis, MO
National Provider Identifier
1376500140
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Family Medicine Physician
- License
- 35048
- Practice address
- 915 N Grand Blvd
Saint Louis, MO 63106-1621 - Phone
- (314) 652-4100
- Fax
- (314) 289-7612
- NPI assigned
- Apr 27, 2006
- 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 |
|---|---|---|---|---|
| Family Medicine Physician | 207Q00000X | 35048 | MO | Primary |
Addresses
Primary practice location
915 N Grand Blvd
Saint Louis, MO 63106-1621
Mailing address
719 Briarfarm LN
Kirkwood, MO 63122-2215
Phone (314) 652-4100
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
- Doctor of Osteopathy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 35048 | MO | MD | Family Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Ozarks Medical Center | Family Medicine | 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 and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1146096000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1376500140",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "719 BRIARFARM LN",
"city": "KIRKWOOD",
"state": "MO",
"postal_code": "631222215",
"telephone_number": "314-652-4100",
"fax_number": "314-289-7612"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "915 N GRAND BLVD",
"city": "SAINT LOUIS",
"state": "MO",
"postal_code": "631061621",
"telephone_number": "314-652-4100",
"fax_number": "314-289-7612"
}
],
"practiceLocations": [],
"basic": {
"last_name": "O'DAY",
"first_name": "MICHAEL",
"middle_name": "JAMES",
"name_prefix": "Dr.",
"credential": "D.O.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-04-27",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207Q00000X",
"taxonomy_group": "",
"desc": "Family Medicine",
"state": "MO",
"license": "35048",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Saint Louis, MO
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.