Active NPI
Madison Messmer, DO
- Emergency Medicine Physician
- Dayton, OH
National Provider Identifier
1164125571
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Emergency Medicine Physician
- License
- DO228745
- Practice address
- 405 W Grand Ave
Dayton, OH 45405-7538 - Phone
- (937) 723-3248
- NPI assigned
- Mar 24, 2023
- 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 |
|---|---|---|---|---|
| Emergency Medicine Physician | 207P00000X | DO228745 | OR | Primary |
Addresses
Primary practice location
405 W Grand Ave
Dayton, OH 45405-7538
Mailing address
405 W Grand Ave
Dayton, OH 45405-7538
Phone (937) 723-3248
Other practice location 1
342 Fairview St
Silverton, OR 97381-1917
Phone (503) 873-1500
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in OR
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Emergency Medicine
- Education
- New York Medical College, 2022
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
1919 NW Lovejoy St
Portland, OR 97209-1503
2850 NW 31St Ave
Portland, OR 97210-1720
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Osteopathy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| DO228745 | OR | MD | Emergency Medicine Physician |
Organizations & group practices 2
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.
-
- Emergency Medicine Physician
- Portland, OR
- NPI 1215983200
-
- General Acute Care Hospital
- Silverton, OR
- NPI 1669424354
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1679616000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1778025600000",
"number": "1164125571",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "405 W GRAND AVE",
"city": "DAYTON",
"state": "OH",
"postal_code": "454057538",
"telephone_number": "937-723-3248"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "405 W GRAND AVE",
"city": "DAYTON",
"state": "OH",
"postal_code": "454057538",
"telephone_number": "937-723-3248"
}
],
"practiceLocations": [
{
"address_1": "342 Fairview St",
"address_purpose": "LOCATION",
"city": "Silverton",
"state": "OR",
"postal_code": "973811917",
"country_code": "US",
"telephone_number": "503-873-1500",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "MESSMER",
"first_name": "MADISON",
"credential": "DO",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2023-03-24",
"last_updated": "2026-05-06",
"certification_date": "2026-05-06",
"status": "A"
},
"taxonomies": [
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "OR",
"license": "DO228745",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Dayton, OH
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 6, 2026; 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.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.