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PATHOLOGY ASSOCIATES OF ARCADIA
NPI 1659633493
Pathology - Anatomic Pathology & Clinical Pathology in Pasadena, CA

Active since June 07, 2012
405 LINDA VISTA AVE, PASADENA, CA 91105(323) 409-4600(323) 441-8183 Get Directions Write a Review

NPPES record last updated: March 6, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 6, 2026, May 15, 2025 (2 updates tracked since 2025).

About Pathology Associates Of Arcadia NPPES

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

PATHOLOGY ASSOCIATES OF ARCADIA (NPI 1659633493) is a healthcare organization registered as an anatomic pathology & clinical pathology in Pasadena, California and active in the NPI registry since June 2012. The organization lists Parakrama T Chandrasoma, President, as its authorized official.

NPPES Registry Identity

NPI1659633493
Entity TypeOrganization
Primary Taxonomy207ZP0102X
Legal Business NamePATHOLOGY ASSOCIATES OF ARCADIA
Location Address405 LINDA VISTA AVEPasadena, CA 91105-1237
Mailing Address5700 Southwyck BlvdToledo, OH 43614-1509 · (800) 288-8325 · Fax (419) 866-5453
Phone(323) 409-4600
Fax(323) 441-8183
Organization SubpartNo
Authorized OfficialParakrama T ChandrasomaPresident · (800) 288-8325
Enumeration DateJune 7, 2012
Last NPPES UpdateMarch 6, 20262 updates tracked since enumeration
NPPES CertifiedMarch 6, 2026
✔ NPI 1659633493 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in CA · A34284
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.
405 LINDA VISTA AVE, Pasadena, CA 91105
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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)

Pathology Associates Of Arcadia is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to Pathology Associates Of Arcadia, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 3 within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

Parakrama Chandrasoma, M.D.
Pathology
NPI 1467446013
405 LINDA VISTA AVE
Pasadena, CA 91105
(323) 226-4600
✔ PECOS✔ Accepts MedicareSame address
Roger Der, M.D.
Pathology
NPI 1558355156
300 W HUNTINGTON DR
Arcadia, CA 91007
(626) 574-3488
✔ PECOS✔ Accepts Medicare7.3 mi
William Bishop, D.O.
Pathology
NPI 1821268533
300 W HUNTINGTON DR PATHOLOGY DEPT
Arcadia, CA 91007
(626) 574-3488
✔ PECOS✔ Accepts Medicare7.3 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 Pathology Associates Of Arcadia's NPI number?

The NPI number for Pathology Associates Of Arcadia is 1659633493. It was assigned to this organization in the NPPES registry on June 7, 2012.

Where is Pathology Associates Of Arcadia located?

Pathology Associates Of Arcadia is located at 405 Linda Vista Ave, Pasadena, CA 91105. The listed phone number is (323) 409-4600.

What is Pathology Associates Of Arcadia's specialty?

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

Is Pathology Associates Of Arcadia enrolled in Medicare?

Yes. Pathology Associates Of Arcadia is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Pathology Associates Of Arcadia?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Pathology, reassign their Medicare billing to Pathology Associates Of Arcadia. 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, 1 practice at this address and 3 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Pathology Associates Of Arcadia was last updated on March 6, 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.