DENNIS A. CHUCK M.D. INC.
NPI 1225263312
Ophthalmology in Pomona, CA

Q: What is Dennis A. Chuck M.D. Inc.'s NPI number?

The NPI number for Dennis A. Chuck M.D. Inc. is 1225263312. It was assigned to this organization in the NPPES registry on May 19, 2009.

Q: What is Dennis A. Chuck M.D. Inc.'s specialty?

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

Active since May 19, 2009

1774 ALAMEDA ST, POMONA, CA 91768(909) 622-1188(909) 623-4768 Get Directions Write a Review

NPPES record last updated: May 19, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dennis A. Chuck M.d. Inc. NPPES

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

DENNIS A. CHUCK M.D. INC. (NPI 1225263312) is a healthcare organization registered as an ophthalmology in Pomona, California and active in the NPI registry since May 2009. The organization lists Carmelinda Villa, Medical Biller, as its authorized official.

NPPES Registry Identity

NPI1225263312

Entity TypeOrganization

Primary Taxonomy207W00000X

Legal Business NameDENNIS A. CHUCK M.D. INC.

Location Address1774 ALAMEDA STPomona, CA 91768-1727

Mailing Address1774 Alameda StPomona, CA 91768-1727 · (909) 622-1188 · Fax (909) 623-4768

Phone(909) 622-1188

Fax(909) 623-4768

Organization SubpartNo

Authorized OfficialCarmelinda VillaMedical Biller · (909) 622-1188

Enumeration DateMay 19, 2009

✔ NPI 1225263312 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

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.

1774 ALAMEDA ST, Pomona, CA 91768

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dennis A. Chuck M.d. Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date

StateCaliforniaEnrollment IDO20090723000745Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027

Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Dennis A. Chuck M.D. Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Dennis Chuck, MD

Ophthalmology

NPI 1033183413

1774 ALAMEDA ST
Pomona, CA 91768

(909) 622-1188

✔ PECOS✔ Accepts MedicareSame address

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

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 Dennis A. Chuck M.D. Inc.'s NPI number?

The NPI number for Dennis A. Chuck M.D. Inc. is 1225263312. It was assigned to this organization in the NPPES registry on May 19, 2009.

Where is Dennis A. Chuck M.D. Inc. located?

Dennis A. Chuck M.D. Inc. is located at 1774 Alameda St, Pomona, CA 91768. The listed phone number is (909) 622-1188.

What is Dennis A. Chuck M.D. Inc.'s specialty?

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

Is Dennis A. Chuck M.D. Inc. enrolled in Medicare?

Yes. Dennis A. Chuck M.D. Inc. is registered in the Medicare PECOS enrollment system.

When is Dennis A. Chuck M.D. Inc.'s Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Dennis A. Chuck M.D. Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Ophthalmology) reassigns their Medicare billing to Dennis A. Chuck M.D. Inc.. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Dennis A. Chuck M.D. Inc. was last updated on May 19, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.