CORIUM DIAGNOSTICS
NPI 1568691079
Pathology - Dermatopathology in Norwalk, CT

Q: What is Gary A. Letts, M.D. LLC's NPI number?

The NPI number for Gary A. Letts, M.D. LLC is 1568691079. It was assigned to this organization in the NPPES registry on July 6, 2009. The provider is doing business as Corium Diagnostics.

Q: What is Gary A. Letts, M.D. LLC's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Dermatopathology, with taxonomy code 207ZD0900X.

Active since July 06, 2009CLIA 07D1082246 · Accreditation

148 EAST AVE STE 2D, NORWALK, CT 06851(203) 348-7546(203) 348-7547 Get Directions Write a Review

NPPES record last updated: August 11, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Corium Diagnostics NPPES

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

CORIUM DIAGNOSTICS (NPI 1568691079) is a healthcare organization registered as a dermatopathology in Norwalk, Connecticut and active in the NPI registry since July 2009. The organization holds an CLIA Accreditation certificate valid through April 12, 2028 and lists Gary A Letts, President And Medical Director, as its authorized official.

NPPES Registry Identity

NPI1568691079

Entity TypeOrganization

Primary Taxonomy207ZD0900X

Legal Business NameGARY A. LETTS, M.D. LLC

Location Address148 EAST AVE STE 2DNorwalk, CT 06851-5726

Mailing Address148 East Ave Ste 2dNorwalk, CT 06851-5726 · (203) 348-7546 · Fax (203) 348-7547

Phone(203) 348-7546

Fax(203) 348-7547

Organization SubpartNo

Authorized OfficialGary A LettsPresident And Medical Director · (203) 832-3737

Enumeration DateJuly 6, 2009

Last NPPES UpdateAugust 11, 2020

NPPES CertifiedAugust 11, 2020

✔ NPI 1568691079 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · DermatopathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZD0900X

License✔ Licensed in CT · 043041

Definition

A dermatopathologist is an expert in diagnosing and monitoring diseases of the skin including infectious, immunologic, degenerative, and neoplastic diseases. This entails the examination and interpretation of specially prepared tissue sections, cellular scrapings, and smears of skin lesions by means of light microscopy, electron microscopy, and fluorescence microscopy.

148 EAST AVE STE 2D, Norwalk, CT 06851

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Other Names 1

Doing Business AsCorium Diagnostics

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Corium Diagnostics is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Corium Diagnostics, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gary Letts, M.D.

Pathology

NPI 1124235437

148 EAST AVE STE 2D
Norwalk, CT 06851

(203) 832-3737

✔ 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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 07D1082246

Gary A Letts, MD, LLC D/B/A - Corium Diagnostics · Norwalk, CT

Active · expires Apr 12, 2028

CLIA Number07D1082246

Laboratory TypeIndependent

Certificate Effective DateApril 13, 2026

Certificate Expiration DateApril 12, 2028

Laboratory DirectorDr. Gary Letts

Laboratory Phone(203) 348-7546

Laboratory LocationGary A Letts, MD, LLC D/B/A - Corium Diagnostics148 East Ave, Ste 2D, Norwalk, CT 06851

CLIA data matches this NPI record on: Address Name Phone

This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Gary A. Letts, M.D. LLC's NPI number?

The NPI number for Gary A. Letts, M.D. LLC is 1568691079. It was assigned to this organization in the NPPES registry on July 6, 2009. The provider is doing business as Corium Diagnostics.

Where is Gary A. Letts, M.D. LLC located?

Gary A. Letts, M.D. LLC is located at 148 East Ave Ste 2D, Norwalk, CT 06851. The listed phone number is (203) 348-7546.

What is Gary A. Letts, M.D. LLC's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Dermatopathology, with taxonomy code 207ZD0900X.

Is Gary A. Letts, M.D. LLC enrolled in Medicare?

Yes. Gary A. Letts, M.D. LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gary A. Letts, M.D. LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pathology) reassigns their Medicare billing to Gary A. Letts, M.D. LLC. 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.

Does Gary A. Letts, M.D. LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 07D1082246) is associated with this NPI, valid through April 12, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Gary A. Letts, M.D. LLC was last updated on August 11, 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.