Active NPI
Zachary Nan
- Internal Medicine Physician
- Chicago, IL
National Provider Identifier
1598523755
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- 125.085699
- Practice address
- 5841 S. Maryland Ave.
M/C 7082
Chicago, IL 60637-1443 - Phone
- (774) 702-6840
- NPI assigned
- Mar 11, 2024
- 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 |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | 125.085699 | IL | Primary |
Addresses
Primary practice location
5841 S. Maryland Ave.
M/C 7082
Chicago, IL 60637-1443
Mailing address
180 Harvester Dr Ste 110
Burr Ridge, IL 60527-6686
Phone (733) 702-1150
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
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20250708001992 | IL | Order and Referring Only - Internal Medicine | 0840704375 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 125.085699 | IL | MD | Internal Medicine Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1710115200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1747008000000",
"number": "1598523755",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "180 HARVESTER DR STE 110",
"city": "BURR RIDGE",
"state": "IL",
"postal_code": "605276686",
"telephone_number": "733-702-1150"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5841 S. MARYLAND AVE.",
"address_2": "M/C 7082",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606371443",
"telephone_number": "774-702-6840"
}
],
"practiceLocations": [],
"basic": {
"last_name": "NAN",
"first_name": "ZACHARY",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2024-03-11",
"last_updated": "2025-05-12",
"certification_date": "2025-05-12",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "IL",
"license": "125.085699",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Chicago, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 12, 2025; 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.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.