William Gerardi, M.D.
William Gerardi, M.D. is an Internal Medicine Physician in Chicago, IL, registered under NPI 1003025891. 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 Aug 30, 2026. Parking is available about 0.38 mi away. There is EV charging 0.34 mi from the office (EVgo) — useful if you are driving in from out of town. The nearest transit stop is 383 ft away, served by Lake Shore Drive & Waveland. A pharmacy sits 0.33 mi from the entrance (Osco Drug), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.25 mi away.
Getting here and what is nearby
Transit Lake Shore Drive & Grace 301 ft ~2 min
Transit Lake Shore Drive & Grace 320 ft ~2 min
Transit Lake Shore Drive & Waveland 383 ft ~2 min
Restaurant Two Wheel Tacos 518 ft ~2 min
Convenience The New York Market 800 ft ~4 min
693 West Waveland Avenue, Chicago 60613
Mo-Sa 08:00-22:00
Coffee Clock Tower Cafe 848 ft ~4 min
Parking Waveland Parking Lot 942 ft ~4 min
Convenience 3550 Convenience Store 0.22 mi ~5 min
3550 North Lake Shore Drive, Chicago 60657
Coffee Pancake Cafe 0.25 mi ~5 min
3805 North Broadway, Chicago 60613
Mo-Th 08:00-15:00; Fr-Su 08:00-15:00
Coffee Coffee Tree & Tea Leaves 0.25 mi ~6 min
3752 North Broadway, Chicago 60613
Mo-Fr 10:00-17:00; Sa 09:00-17:00; Su 11:00-16:00
Convenience 7-Eleven 0.25 mi ~6 min
Restaurant Subway 0.25 mi ~5 min
Restaurant Wingstop 0.26 mi ~6 min
Hotel Majestic Inn 0.27 mi ~6 min
Pharmacy Walgreens 0.28 mi ~6 min
Grocery Jewel-Osco 0.32 mi ~7 min
EV charging Volta Charging Station 0.33 mi ~7 min
Pharmacy Osco Drug 0.33 mi ~7 min
EV charging EVgo 0.34 mi ~7 min
Parking 0.34 mi ~7 min
Mo-Su 06:00-23:00
Grocery Whole Foods Market 0.34 mi ~7 min
3640 North Halsted Street, Chicago 60613
Mo-Su 08:00-21:00
Gas station BP 0.38 mi ~8 min
841 West Irving Park Road, Chicago 60613
Parking 0.38 mi ~8 min
808 West Addison Street, Chicago 60613
Gas station Shell 0.40 mi ~8 min
801 West Addison Street, Chicago 60657
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 |
|---|---|---|
| A42730 | CA | Internal Medicine Physician |
| ME75755 | FL | Internal Medicine Physician primary |
Licences are recorded in 2 states: CA, FL. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 2 states
This provider holds licences in 2 states: California and Florida. 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 Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | A42730 | CA | |
| 207R00000X | Internal Medicine Physician | ME75755 | FL | primary |
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 | 1003025891 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 21, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | M.D. |
| Practice address |
3730 N LAKE SHORE DR APARTMENT 2A Chicago, IL 60613 (773) 244-3060 |
| Mailing address |
3730 N LAKE SHORE DRIVE APARTMENT 2A Chicago, IL 60613 |
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 | 2 | 5 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 2 | 1 | 8 | 9 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.