John Millichap, M.D.
John Millichap, M.D. is a Neurology with Special Qualifications in Child Neurology Physician in Chicago, IL, registered under NPI 1225211600. 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
The practice address on file is 1 E ERIE ST STE 525-4066, Chicago, IL 60611. 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 |
|---|---|---|
| 036118282 | IL | Neurology with Special Qualifications in… primary |
| 2024-00978 | NC | Neurology with Special Qualifications in… |
| 01086832A | IN | Neurology with Special Qualifications in… |
| 036118282 | IL | Clinical Neurophysiology Physician |
Licences are recorded in 3 states: IL, NC, IN. 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
- 4688827009
Enrolled in Medicare 16 times, across 16 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Illinois | I20130116000187 | Practitioner - Neurology |
| Nebraska | I20211220000888 | Practitioner - Neurology |
| Colorado | I20211228000505 | Practitioner - Neurology |
| Montana | I20220107002250 | Practitioner - Neurology |
| Iowa | I20220120000894 | Practitioner - Neurology |
| Georgia | I20220125001368 | Practitioner - Neurology |
| Indiana | I20220202001888 | Practitioner - Neurology |
| Pennsylvania | I20220208000326 | Practitioner - Neurology |
| North Dakota | I20220210002447 | Practitioner - Neurology |
| California | I20220216000974 | Practitioner - Neurology |
| Washington | I20221224000076 | Practitioner - Neurology |
| Oklahoma | I20230613002070 | Practitioner - Neurology |
| Missouri | I20230818003363 | Practitioner - Neurology |
| Tennessee | I20241015000481 | Practitioner - Neurology |
| North Carolina | I20241108002164 | Practitioner - Neurology |
| South Dakota | I20250821003183 | Practitioner - Neurology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Neurology. There are 16 separate enrolment records across 16 states (IL, NE, CO, MT, IA, GA, IN, PA, ND, CA, WA, OK, MO, TN, NC, SD). 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 3 states
This provider holds licences in 3 states: Illinois, Indiana and North Carolina. The practice address on file is in Chicago, IL, but a licence in another state usually means they see patients there too — either at a second location or 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
- 036118282
- Specialty
- Neurology with Special Qualifications…
- Licence
- 01086832A
- Specialty
- Neurology with Special Qualifications…
- Licence
- 2024-00978
- Specialty
- Neurology with Special Qualifications…
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 Neurology with Special Qualifications in Child Neurology covers
A Child Neurologist specializes in neurology with special skills in diagnosis and treatment of neurologic disorders of the neonatal period, infancy, early childhood, and adolescence. NUCC Health Care Provider Taxonomy, code 2084N0402X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2084N0402X | Neurology with Special Qualifications in Child Neurology Physician Neurology with Special Qualifications in Child Neurology | 036118282 | IL | primary |
| 2084N0402X | Neurology with Special Qualifications in Child Neurology Physician Neurology with Special Qualifications in Child Neurology | 2024-00978 | NC | |
| 2084N0402X | Neurology with Special Qualifications in Child Neurology Physician Neurology with Special Qualifications in Child Neurology | 01086832A | IN | |
| 2084N0600X | Clinical Neurophysiology Physician Clinical Neurophysiology | 036118282 | IL |
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 | 1225211600 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 9, 2007 |
| Last updated | Jul 23, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
1 E ERIE ST STE 525-4066 Chicago, IL 60611 (833) 530-3034 Fax (833) 464-3529 |
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 | 2 | 2 | 5 | 2 | 1 | 1 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 4 | 5 | 4 | 1 | 2 | 6 | 0 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.