Grossweiner & Blaszak, P.C.
Grossweiner & Blaszak, P.C. is a healthcare organization registered as Dermatology Physician in Naperville, IL, holding Type 2 (organization) NPI 1194789990 since 2006. The authorized official on file is Laura Heimburger, Business Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1194789990 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Grossweiner & Blaszak, P.C. |
| Practice address | 1220 HOBSON RD STE 116, Naperville, IL, 60540 |
| Phone | 6303556660 |
| Fax | 6305272856 |
| Enumeration date | 2006-04-17 |
| Last updated in NPPES | 2022-07-18 |
Authorized official
| Name | Laura Heimburger |
|---|---|
| Title | Business Manager |
| Phone | 6303556660 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207N00000X | Dermatology Physician | Primary | — | — |
Copy-ready billing details
Provider: Grossweiner & Blaszak, P.C. NPI: 1194789990 Taxonomy: 207N00000X (Dermatology Physician) Address: 1220 HOBSON RD STE 116, Naperville, IL, 60540
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1245294008 | Wayne Blaszak | Individual | Dermatology Physician | Naperville, IL |
| 1437114907 | James Grossweiner | Individual | Dermatology Physician | Naperville, IL |
Verify this record
Cross-check NPI 1194789990 against the authoritative CMS record: view Grossweiner & Blaszak, P.C. on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What is the NPI number for Grossweiner & Blaszak, P.C.?
Who is the authorized official for Grossweiner & Blaszak, P.C.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-07-18.