SERGEY LYASS MD A PROFESSIONAL CORPORATION
NPI 1780760231
Surgery in Los Angeles, CA

Q: What is Sergey Lyass MD A Professional Corporation's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Active since October 27, 2006

6404 WILSHIRE BLVD STE 701, LOS ANGELES, CA 90048(310) 623-1786(310) 623-1922 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 13, 2026, Jan 13, 2026 (2 updates tracked since 2026).

On this page

About Sergey Lyass Md A Professional Corporation NPPES

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

SERGEY LYASS MD A PROFESSIONAL CORPORATION (NPI 1780760231) is a healthcare organization registered as a surgery in Los Angeles, California and active in the NPI registry since October 2006. The organization lists Sergey Lyass, President, as its authorized official.

NPPES Registry Identity

NPI1780760231

Entity TypeOrganization

Primary Taxonomy208600000X

Legal Business NameSERGEY LYASS MD A PROFESSIONAL CORPORATION

Location Address6404 WILSHIRE BLVD STE 701Los Angeles, CA 90048-5509

Mailing Address4301 Grimes PlEncino, CA 91316-4361 · (310) 623-1786 · Fax (310) 693-5334

Phone(310) 623-1786

Fax(310) 623-1922

Organization SubpartNo

Authorized OfficialSergey LyassPresident · (310) 623-1786

Enumeration DateOctober 27, 2006

Last NPPES UpdateMay 13, 20262 updates tracked since enumeration

NPPES CertifiedMay 13, 2026

✔ NPI 1780760231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · A80181

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

6404 WILSHIRE BLVD STE 701, Los Angeles, CA 90048

Open in Google Maps ↗

Other Identifiers 1

Medicaid2032137CA

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)

Sergey Lyass Md A Professional Corporation 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 Sergey Lyass MD A Professional Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Sergey Lyass, MD

General Surgery

NPI 1316996911

4301 GRIMES PL
Encino, CA 91316

(310) 623-1786

✔ PECOS✔ Accepts Medicare11 mi

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 Sergey Lyass MD A Professional Corporation's NPI number?

The NPI number for Sergey Lyass MD A Professional Corporation is 1780760231. It was assigned to this organization in the NPPES registry on October 27, 2006.

Where is Sergey Lyass MD A Professional Corporation located?

Sergey Lyass MD A Professional Corporation is located at 6404 Wilshire Blvd Ste 701, Los Angeles, CA 90048. The listed phone number is (310) 623-1786.

What is Sergey Lyass MD A Professional Corporation's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Sergey Lyass MD A Professional Corporation enrolled in Medicare?

Yes. Sergey Lyass MD A Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Sergey Lyass MD A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (General Surgery) reassigns their Medicare billing to Sergey Lyass MD A Professional Corporation. 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 Sergey Lyass MD A Professional Corporation was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.