Merry Gindorf, O.D.
Merry Gindorf, O.D. is a provider specialising in Optometrist in North Riverside, IL, registered under NPI 1962625145. This provider registers 7 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 8847 W CERMAK RD, North Riverside, IL 60546. 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 |
|---|---|---|
| 046-007563 | IL | Optometrist primary |
| 046-007563 | IL | Corneal and Contact Management Optometrist |
| 046-007563 | IL | Vision Therapy Optometrist |
| 046-007563 | IL | Sports Vision Optometrist |
| 046-007563 | IL | Occupational Vision Optometrist |
| 046-007563 | IL | Low Vision Rehabilitation Optometrist |
| 046-007563 | IL | Pediatric Optometrist |
This provider holds licence 046-007563 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 Optometrist covers
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system. NUCC Health Care Provider Taxonomy, code 152W00000X
All registered taxonomy codes
This provider registers 7 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 152W00000X | Optometrist | 046-007563 | IL | primary |
| 152WC0802X | Corneal and Contact Management Optometrist Corneal and Contact Management | 046-007563 | IL | |
| 152WV0400X | Vision Therapy Optometrist Vision Therapy | 046-007563 | IL | |
| 152WS0006X | Sports Vision Optometrist Sports Vision | 046-007563 | IL | |
| 152WX0102X | Occupational Vision Optometrist Occupational Vision | 046-007563 | IL | |
| 152WL0500X | Low Vision Rehabilitation Optometrist Low Vision Rehabilitation | 046-007563 | IL | |
| 152WP0200X | Pediatric Optometrist Pediatrics | 046-007563 | 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 | 1962625145 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 10, 2007 |
| Last updated | Sep 18, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | O.D. |
| Practice address |
8847 W CERMAK RD North Riverside, IL 60546 (708) 442-4700 Fax (708) 442-4703 |
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 | 9 | 6 | 2 | 6 | 2 | 5 | 1 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 3 | 2 | 3 | 2 | 1 | 1 | 8 |
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.