Gregory C. Maliszewski, OD
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2025
- Practice address
- 23600 El Toro Rd, Lake Forest, CA 92630
- Practice phone
- Call (800) 571-5202
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
National Vision, Inc.
Lake Forest, California
Find Gregory Maliszewski's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Gregory C. Maliszewski is an optometrist in Lake Forest, California
Gregory Maliszewski practices at National Vision, Inc. in Lake Forest, California.
Gregory Maliszewski's NPI, 1063301836, was assigned on June 28, 2025. Gregory Maliszewski holds Illinois license 046.011974.
- NPI
- 1063301836NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183111875
- NPI enumeration date
- June 28, 2025
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (800) 571-5202
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 27
- Medical school graduation
- 2025
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory C. Maliszewski practices at National Vision, Inc. in Lake Forest, California
Gregory Maliszewski's primary practice is National Vision, Inc., at 23600 El Toro Rd, Lake Forest, CA 92630 in Orange County. The practice phone is (800) 571-5202.
- National Vision, Inc.23600 El Toro Rd, Lake Forest, CA 92630 · Orange CountyPhone(800) 571-5202
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Gregory C. Maliszewski is affiliated with 2 sites of care and 1 medical group
Gregory Maliszewski's primary practice is National Vision, Inc. in Lake Forest, California. Dmand AI also links Gregory Maliszewski to 1 physician office and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Gregory C. Maliszewski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Maliszewski practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| National Vision, Inc. | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory C. Maliszewski is one of 7,206 optometrists in California
Optometrist is Gregory Maliszewski's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Gregory Maliszewski is licensed in Illinois.
Specialties and state licenses
- Optometrist, IllinoisPrimary
Optometrists near Gregory Maliszewski
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Gregory C. Maliszewski's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Gregory Maliszewski's median patient age at 37, with 60% women.
Gregory Maliszewski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
How Gregory C. Maliszewski takes part in Medicare
Gregory Maliszewski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Gregory C. Maliszewski's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Gregory C. Maliszewski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory C. Maliszewski's NPI number?
Gregory C. Maliszewski's NPI number is 1063301836. It was assigned on June 28, 2025, and it is active in the NPI Registry.
What does Gregory C. Maliszewski specialize in?
Gregory C. Maliszewski is an optometrist in Lake Forest, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Gregory C. Maliszewski practice?
Gregory Maliszewski practices at 23600 El Toro Rd, Lake Forest, CA 92630. Gregory Maliszewski's primary practice is National Vision, Inc. in Lake Forest, California. Dmand AI also links Gregory Maliszewski to 1 physician office and 1 medical group.
What is Gregory C. Maliszewski's office phone number?
The practice phone on file for Gregory Maliszewski is (800) 571-5202.
What is Gregory C. Maliszewski's medical license number?
Gregory Maliszewski holds Illinois license 046.011974.
Does Gregory C. Maliszewski accept Medicare?
Yes. CMS lists Gregory Maliszewski as accepting Medicare assignment.
How long has Gregory C. Maliszewski been practicing?
Gregory Maliszewski graduated from medical school in 2025, 1 years ago.
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