Active NPI
Luis R Gerstenmaier, M.D.
- Endocrinology, Diabetes & Metabolism Physician
- Toledo, OH
National Provider Identifier
1528064029
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Endocrinology, Diabetes & Metabolism Physician
- License
- 35036136
- Practice address
- 3140 W Central Ave
Toledo, OH 43606-2920 - Phone
- (419) 537-5111
- Fax
- (419) 537-5131
- NPI assigned
- Jun 21, 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 |
|---|---|---|---|---|
| Endocrinology, Diabetes & Metabolism Physician | 207RE0101X | 35036136 | OH | Primary |
Addresses
Primary practice location
3140 W Central Ave
Toledo, OH 43606-2920
Mailing address
3140 W Central Ave
Toledo, OH 43606-2920
Phone (419) 537-5111
Other identifiers 4
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0234295 | Medicaid | OH | |
| 00071 | Other | OH | PARAMOUNT |
| 000000203476 | Other | OH | ANTHEM |
| 4002420 | Other | OH | AETNA |
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 Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 35036136 | OH | MD | Endocrinology, Diabetes & Metabolism Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Lima Memorial Joint Operating Company | 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.
-
- General Acute Care Hospital
- Lima, OH
- NPI 1336144732
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1119312000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1528064029",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3140 W CENTRAL AVE",
"city": "TOLEDO",
"state": "OH",
"postal_code": "436062920",
"telephone_number": "419-537-5111",
"fax_number": "419-537-5131"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3140 W CENTRAL AVE",
"city": "TOLEDO",
"state": "OH",
"postal_code": "436062920",
"telephone_number": "419-537-5111",
"fax_number": "419-537-5131"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GERSTENMAIER",
"first_name": "LUIS",
"middle_name": "R",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-06-21",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207RE0101X",
"taxonomy_group": "",
"desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
"state": "OH",
"license": "35036136",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "0234295",
"state": "OH"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "PARAMOUNT",
"identifier": "00071",
"state": "OH"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "ANTHEM",
"identifier": "000000203476",
"state": "OH"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "AETNA",
"identifier": "4002420",
"state": "OH"
}
],
"endpoints": [],
"other_names": []
}Other providers in Toledo, OH
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.