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BORIS SHLOPOV MD PATHOLOGY MEDICAL CORPORATION
NPI 1972080752
Pathology - Anatomic Pathology & Clinical Pathology in Corona, CA

Active since July 24, 2018
800 S MAIN, CORONA, CA 92882(951) 736-6383(909) 736-6384 Get Directions Write a Review

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

About Boris Shlopov Md Pathology Medical Corporation NPPES

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

BORIS SHLOPOV MD PATHOLOGY MEDICAL CORPORATION (NPI 1972080752) is a healthcare organization registered as an anatomic pathology & clinical pathology in Corona, California and active in the NPI registry since July 2018. The organization lists Boris Shlopov, President, as its authorized official.

NPPES Registry Identity

NPI1972080752
Entity TypeOrganization
Primary Taxonomy207ZP0102X
Legal Business NameBORIS SHLOPOV MD PATHOLOGY MEDICAL CORPORATION
Location Address800 S MAINCorona, CA 92882
Mailing AddressPo Box 104231Pasadena, CA 91189-4231 · (951) 256-3585
Phone(951) 736-6383
Fax(909) 736-6384
Organization SubpartNo
Authorized OfficialBoris ShlopovPresident · (858) 877-0267
Enumeration DateJuly 24, 2018
Last NPPES UpdateFebruary 25, 2026
NPPES CertifiedFebruary 25, 2026
✔ NPI 1972080752 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
800 S MAIN, Corona, CA 92882
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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 and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Boris Shlopov Md Pathology Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Boris Shlopov MD Pathology Medical Corporation, which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Stephan Grigorian, M.D.
Pathology
NPI 1821129057
800 S MAIN ST
Corona, CA 92882
(858) 877-0267
✔ PECOS✔ Accepts MedicareSame address
Ammar Matloob, MD
Pathology
NPI 1780051565
800 S MAIN ST
Corona, CA 92882
(951) 937-4343
✔ PECOS✔ Accepts MedicareSame address
Nawar Matti, M.D.
Pathology
NPI 1548624836
800 S MAIN ST
Corona, CA 92882
(951) 736-6383
✔ PECOS✔ Accepts MedicareSame address
Boris Shlopov, M.D., PH.D.
Pathology
NPI 1801088406
800 S MAIN ST
Corona, CA 92882
(951) 737-4343
✔ 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 Boris Shlopov MD Pathology Medical Corporation's NPI number?

The NPI number for Boris Shlopov MD Pathology Medical Corporation is 1972080752. It was assigned to this organization in the NPPES registry on July 24, 2018.

Where is Boris Shlopov MD Pathology Medical Corporation located?

Boris Shlopov MD Pathology Medical Corporation is located at 800 S Main, Corona, CA 92882. The listed phone number is (951) 736-6383.

What is Boris Shlopov MD Pathology Medical Corporation's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Boris Shlopov MD Pathology Medical Corporation enrolled in Medicare?

Yes. Boris Shlopov MD Pathology Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Boris Shlopov MD Pathology Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Pathology, reassign their Medicare billing to Boris Shlopov MD Pathology Medical 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. Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Boris Shlopov MD Pathology Medical Corporation was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.