CATHERINE CORINA VIOLET GERONTIS M.D.
NPI 1477553253
Ophthalmology in Commack, NY

Q: What is Catherine Gerontis's NPI number?

The NPI number for Catherine Gerontis is 1477553253. It was assigned to this individual provider in the NPPES registry on July 22, 2005. The provider is also known as C Corina Gerontis M.D..

Q: What is Catherine Gerontis's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Active since July 22, 2005PECOS Enrolled

58 VANDERBILT MOTOR PKWY STE 300, COMMACK, NY 11725(631) 439-5440 Get Directions Write a Review

NPPES record last updated: April 20, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Catherine Corina Violet Gerontis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CATHERINE CORINA VIOLET GERONTIS M.D. (NPI 1477553253) is an individual ophthalmology provider in Commack, New York, licensed in New York (188154) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS and maintains a secondary practice location in Commack.

NPPES Registry Identity

NPI1477553253

Entity TypeIndividualFemale

Primary Taxonomy207W00000X

Provider Legal NameCATHERINE CORINA VIOLET GERONTISCredential: M.D.

Location Address58 VANDERBILT MOTOR PKWY STE 300Commack, NY 11725-5724

Mailing AddressPo Box 595Commack, NY 11725-0595 · (631) 439-0946 · Fax (631) 439-5447

Phone(631) 439-5440

Sole ProprietorYes

Enumeration DateJuly 22, 2005

Last NPPES UpdateApril 20, 2020

NPPES CertifiedApril 20, 2020

✔ NPI 1477553253 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in NY · 188154

Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Also ListedOphthalmology · Pediatric Ophthalmology and Strabismus SpecialistTaxonomy 207WX0110X · License 188154 (NY)

58 VANDERBILT MOTOR PKWY STE 300, Commack, NY 11725

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Other Names 1

Professional Name (2)C Corina Gerontis M.d.

Secondary Practice Location 1

Location 1353 Veterans Memorial HwyCommack, NY 11725-4200 · Phone (631) 439-0946 · Fax (631) 439-5447

Other Identifiers 18

Other113547507Island Group

Other188154A27Healthfirst Chp

Other2C8244Health Net

Other0401751Ghi

Other31160PHip Health Care Partners

Other112658697Jj New/usi

Other27626Anthem

Other113547507Great West

Other2436110Aetna

Other8209571002Cigna Hmo

Other112658697First Health

Other113547507Cigna Ppo

Other31160PHip

Other48Z811Blue Cross/child

Other188154A27Healthfirst

Other113547507Beech Tree

Other113547507Empire

OtherGC8154Atlantis

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Catherine Corina Violet Gerontis M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Catherine Gerontis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Chs Physician Partners, P.C

11 mi

Family Medicine

213 MONTAUK HWY
West Sayville, NY 11796

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Chs Physician Partners PC
944 clinicians in this Medicare group

NPI 1679823512 (631) 563-6205

North Shore-Lij Medical PC

23 mi

Urology

1010 NORTHERN BLVD STE 110
Great Neck, NY 11021

Reassigned Medicare billing, New York enrollment
9,353 clinicians in this Medicare group

NPI 1053688572 (516) 321-7400

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11725 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Catherine Gerontis's NPI number?

The NPI number for Catherine Gerontis is 1477553253. It was assigned to this individual provider in the NPPES registry on July 22, 2005. The provider is also known as C Corina Gerontis M.D..

Where is Catherine Gerontis located?

Catherine Gerontis practices at 58 Vanderbilt Motor Pkwy Ste 300, Commack, NY 11725. The listed phone number is (631) 439-5440.

What is Catherine Gerontis's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Catherine Gerontis enrolled in Medicare?

Yes. Catherine Gerontis is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Catherine Gerontis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Gerontis reassigns Medicare benefits to 2 organizations: Chs Physician Partners, P.C (West Sayville, NY) and North Shore-Lij Medical PC (Great Neck, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Catherine Gerontis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Catherine Gerontis was last updated on April 20, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.