Todd Guynn, M.D.
Todd Guynn, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Chicago, IL, registered under NPI 1578559068.
Getting there
The practice address on file is 3000 N HALSTED ST, Chicago, IL 60657. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 036-084979 | IL | Thoracic Surgery (Cardiothoracic Vascular… primary |
This provider holds licence 036-084979 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Cardiac Surgery
- PAC ID
- 3476443458
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Illinois | I20040316000524 | Practitioner - Cardiac Surgery |
| Wisconsin | I20230623002211 | Practitioner - Thoracic Surgery |
| Iowa | I20240319000606 | Practitioner - Thoracic Surgery |
Medicare enrolment is recorded as approved under the provider type Practitioner - Cardiac Surgery. There are 3 separate enrolment records across 3 states (IL, WI, IA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Thoracic Surgery (Cardiothoracic Vascular Surgery) covers
A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty. NUCC Health Care Provider Taxonomy, code 208G00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1578559068 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 21, 2005 |
| Last updated | Feb 14, 2020 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
3000 N HALSTED ST Chicago, IL 60657 (630) 324-7920 |
| Mailing address |
2650 WARRENVILLE RD STE 280 Downers Grove, IL 60515 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 5 | 7 | 8 | 5 | 5 | 9 | 0 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 5 | 8 | 1 | 5 | 9 | 0 | 3 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.