John Knoerzer, LCSW
John Knoerzer, LCSW is a provider specialising in Clinical Social Worker in Chicago, IL, registered under NPI 1003052580. 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 2, 2026. Parking is available about 841 ft away. The nearest transit stop is 743 ft away, served by Montrose & Springfield. A pharmacy sits 0.44 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.46 mi away.
Getting here and what is nearby
Parking 615 ft ~3 min
Transit Montrose & Springfield 685 ft ~3 min
Restaurant Wingstop 672 ft ~3 min
Transit Pulaski & Sunnyside 725 ft ~3 min
Transit Montrose & Springfield 743 ft ~3 min
Parking 762 ft ~3 min
Restaurant Subway 735 ft ~3 min
4445 North Pulaski Road, Chicago 60625
Restaurant Taqueria La Fogata 741 ft ~3 min
3930 West Montrose Avenue, Chicago 60625
Parking 841 ft ~4 min
Convenience 7-Eleven 890 ft ~4 min
4401 North Pulaski Road, Chicago 60625
Mo-Su 07:00-23:00
Convenience Citgo 978 ft ~4 min
4605-4615 North Pulaski Road, Chicago 60625
Gas station Citgo 995 ft ~4 min
4601-4603 North Pulaski Road, Chicago 60625
Convenience BP Shop 0.20 mi ~4 min
4359 North Pulaski Road, Chicago 60625
Gas station BP 0.20 mi ~4 min
4359 North Pulaski Road, Chicago 60641
Pharmacy Walgreens 0.44 mi ~9 min
Coffee Starbucks 0.46 mi ~10 min
Grocery Tony's Fresh Market 0.50 mi ~11 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 |
|---|---|---|
| 149012887 | IL | Clinical Social Worker primary |
This provider holds licence 149012887 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Clinical covers
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances. NUCC Health Care Provider Taxonomy, code 1041C0700X
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 | 1003052580 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 5, 2009 |
| Last updated | Apr 11, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | LCSW |
| Practice address |
3850 W SUNNYSIDE AVE #304 Chicago, IL 60625 (773) 234-1517 |
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 | 0 | 5 | 2 | 5 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 4 | 5 | 7 |
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.