Ahmet Atik, MD
Ahmet Atik, MD is a Neurological Surgery Physician in Chicago, IL, registered under NPI 1003339185. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Chicago, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 0.27 mi away at Medical Campus Parking Garage B. There is EV charging 0.24 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 513 ft away, served by 59th Street & Drexel. If you arrive early, there is a coffee shop 0.27 mi away.
Getting here and what is nearby
EV charging ChargePoint 287 ft ~2 min
Parking Parking/Materials Management 289 ft ~2 min
5835 South Cottage Grove Avenue, Chicago 60637
Restaurant Panera Bread 360 ft ~2 min
Transit Cottage Grove & 59th Street 479 ft ~2 min
Transit Cottage Grove & 59th Street 504 ft ~2 min
Transit 59th Street & Drexel 513 ft ~2 min
Restaurant Panera Bread 824 ft ~4 min
5721 South Maryland Avenue, Chicago 60637
Mo-Fr 07:00-18:00
Coffee French Press Coffee 918 ft ~4 min
970 East 58th Street, Chicago 60637
mo-fr 08:00-20:00 sa-su 09:00-18:00
Restaurant Burrito Beach 0.21 mi ~5 min
Coffee Grounds of Being 0.24 mi ~5 min
1025 East 58th Street, Chicago 60637
EV charging ChargePoint 0.24 mi ~5 min
Parking Campus South Parking 0.24 mi ~5 min
Coffee Harper Cafe 0.27 mi ~6 min
Parking Medical Campus Parking Garage B 0.27 mi ~6 min
5656 South Maryland Avenue, Chicago 60637
Convenience Midway Market 0.30 mi ~6 min
Grocery Jewel-Osco 0.30 mi ~6 min
6014 South Cottage Grove Avenue, Chicago 60637
Mo-Su 06:00-22:00
Convenience Maroon Market 0.39 mi ~8 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| MD475216 | PA | Neurological Surgery Physician primary |
| 35.137605 | OH | Neurological Surgery Physician |
| MD475216 | PA | General Practice Physician |
Licences are recorded in 2 states: PA, OH. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Neurology
- PAC ID
- 7416382155
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Ohio | I20200127001642 | Practitioner - Neurology |
| Pennsylvania | I20211101000482 | Practitioner - Family Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 2 separate enrolment records across 2 states (OH, PA). 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.
Licensed in 2 states
This provider holds licences in 2 states: Ohio and Pennsylvania. Multi-state licensure often means the provider works near a state border, covers more than one office, or delivers care by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Neurological Surgery covers
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution. NUCC Health Care Provider Taxonomy, code 207T00000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207T00000X | Neurological Surgery Physician | MD475216 | PA | primary |
| 207T00000X | Neurological Surgery Physician | 35.137605 | OH | |
| 208D00000X | General Practice Physician | MD475216 | PA |
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 | 1003339185 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 20, 2017 |
| Last updated | Aug 27, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | MD |
| Practice address |
5841 S MARYLAND AVE Chicago, IL 60637 (177) 370-2123 |
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 | 0 | 0 | 3 | 3 | 3 | 9 | 1 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 3 | 9 | 1 | 7 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
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.