Active NPI
Ryan Geisert
- Anesthesiology Physician
- Naperville, IL
National Provider Identifier
1154901205
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anesthesiology Physician
- License
- 036176430
- Practice address
- 801 S Washington St
Naperville, IL 60540-7499 - Phone
- (630) 527-3000
- NPI assigned
- Apr 13, 2021
- Sex
- Male
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Anesthesiology Physician | 207L00000X | 036176430 | IL | Primary |
Addresses
Primary practice location
801 S Washington St
Naperville, IL 60540-7499
Mailing address
1035 W Van Buren St Apt 1601
Chicago, IL 60607-0101
Phone (402) 617-1430
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
- 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
- Anesthesiology
- Education
- Other, 2021
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
801 S Washington St
Naperville, IL 60540-7430
Phone (630) 527-3000
Hospital & facility affiliations
- Edward Hospital
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 036176430 | IL | MD | Anesthesiology Physician |
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.
-
- Anesthesiology Physician
- Naperville, IL
- NPI 1457309817
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Naperville, IL
- NPI 1427069632
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1618272000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1773360000000",
"number": "1154901205",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1035 W VAN BUREN ST APT 1601",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606070101",
"telephone_number": "402-617-1430"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "801 S WASHINGTON ST",
"city": "NAPERVILLE",
"state": "IL",
"postal_code": "605407499",
"telephone_number": "630-527-3000"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GEISERT",
"first_name": "RYAN",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2021-04-13",
"last_updated": "2026-03-13",
"certification_date": "2026-03-13",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "193400000X SINGLE SPECIALTY GROUP",
"desc": "Anesthesiology",
"state": "IL",
"license": "036176430",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Naperville, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 13, 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.