What is Isabel Gay's NPI number?

Isabel Gay's National Provider Identifier (NPI) is 1518117548, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Isabel Gay's specialty?

Isabel Gay is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).

Where is Isabel Gay located?

Isabel Gay's practice location on file with NPPES is 2800 College Ave, Alton, IL 62002-4742.

What is Isabel Gay's phone number?

The practice phone number listed in the NPPES registry for Isabel Gay is (618) 474-7397.

Does Isabel Gay accept Medicare?

Isabel Gay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Isabel Gay's NPI active?

Yes — Isabel Gay's NPI (1518117548) is active in the NPPES registry as of the last update on 2023-10-12.

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Isabel Gay, DDS, MS

NPI 1518117548 · Periodontics · Alton, IL

Isabel Gay, DDS, MS is a Periodontics provider in Alton, IL (NPI 1518117548).

Provider details

NPI number: 1518117548
Entity type: Individual
Primary specialty: PeriodonticsDental Providers
Credential: DDS, MS
Sex: Female
Sole proprietor: Yes
License: 136000266 (IL)

Practice location

2800 College Ave

Alton, IL 62002-4742

Phone: (618) 474-7397

Fax: (618) 474-7124

Street-level locationGet directions

More IL providers

Mailing address

2800 College Ave

Alton, IL 62002-4742

Specialties & taxonomies

PeriodonticsPrimary1223P0300XLicense 136000266 (IL)
Dental Providers

Enrolled with Medicare as Practitioner - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(87/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
18 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.

Enumerated: 2008-09-26
Last updated: 2023-10-12
Certified: 2023-10-12

Frequently asked questions

What is Isabel Gay's NPI number?: Isabel Gay's National Provider Identifier (NPI) is 1518117548, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Isabel Gay's specialty?: Isabel Gay is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).
Where is Isabel Gay located?: Isabel Gay's practice location on file with NPPES is 2800 College Ave, Alton, IL 62002-4742.
What is Isabel Gay's phone number?: The practice phone number listed in the NPPES registry for Isabel Gay is (618) 474-7397.
Does Isabel Gay accept Medicare?: Isabel Gay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Isabel Gay's NPI active?: Yes — Isabel Gay's NPI (1518117548) is active in the NPPES registry as of the last update on 2023-10-12.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions