Jenelle Mallios Gialousakis, O.D.
NPI 1700190535 · Optometrist · Downers Grove, IL
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jenelle Mallios Gialousakis, O.D. is a Optometrist provider in Downers Grove, IL (NPI 1700190535).
Provider details
- NPI number
- 1700190535
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 046011190 (IL)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-08-04
- Last updated
- 2018-11-16
Frequently asked questions
- What is Jenelle Mallios Gialousakis's NPI number?
- Jenelle Mallios Gialousakis's National Provider Identifier (NPI) is 1700190535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jenelle Mallios Gialousakis's specialty?
- Jenelle Mallios Gialousakis is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Jenelle Mallios Gialousakis located?
- Jenelle Mallios Gialousakis's practice location on file with NPPES is 3450 Lacey Rd, Downers Grove, IL 60515-5430.
- What is Jenelle Mallios Gialousakis's phone number?
- The practice phone number listed in the NPPES registry for Jenelle Mallios Gialousakis is (630) 743-4500.
- Does Jenelle Mallios Gialousakis accept Medicare?
- Jenelle Mallios Gialousakis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jenelle Mallios Gialousakis's NPI active?
- Yes — Jenelle Mallios Gialousakis's NPI (1700190535) is active in the NPPES registry as of the last update on 2018-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.