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ANNE ARUNDEL PATHOLOGY SERVICES, LLC
NPI 1821162181
Pathology - Anatomic Pathology & Clinical Pathology in Annapolis, MD

Active since November 20, 2006
2001 MEDICAL PKWY, ANNAPOLIS, MD 21401(443) 481-4250(443) 481-4221 Get Directions Write a Review

NPPES record last updated: October 25, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Anne Arundel Pathology Services, Llc NPPES

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

ANNE ARUNDEL PATHOLOGY SERVICES, LLC (NPI 1821162181) is a healthcare organization registered as an anatomic pathology & clinical pathology in Annapolis, Maryland and active in the NPI registry since November 2006. The organization lists William R Weisburger, President, as its authorized official.

NPPES Registry Identity

NPI1821162181
Entity TypeOrganization
Primary Taxonomy207ZP0102X
Legal Business NameANNE ARUNDEL PATHOLOGY SERVICES, LLC
Location Address2001 MEDICAL PKWYAnnapolis, MD 21401-3280
Mailing Address2001 Medical PkwyAnnapolis, MD 21401-3280 · (443) 481-4250 · Fax (443) 481-4221
Phone(443) 481-4250
Fax(443) 481-4221
Organization SubpartNo
Authorized OfficialWilliam R WeisburgerPresident · (443) 481-4250
Enumeration DateNovember 20, 2006
Last NPPES UpdateOctober 25, 2007
✔ NPI 1821162181 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.
2001 MEDICAL PKWY, Annapolis, MD 21401
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Other Identifiers 4

OtherN154DC · Ghi
Other481CANMD · Blue Shield
OtherDE2416MD · Railroad Medicare
Medicare PIN166PMD

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)

Anne Arundel Pathology Services, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Anne Arundel Pathology Services, LLC, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (6)

William Weisburger, M.D.
Pathology
NPI 1518031897
2001 MEDICAL PKWY
Annapolis, MD 21401
(443) 481-4250
✔ PECOSSame address
Sanford Robbins, M.D.
Pathology
NPI 1326113796
2001 MEDICAL PKWY
Annapolis, MD 21401
(443) 481-4250
✔ PECOS✔ Accepts MedicareSame address
Jason Schallheim, MD
Pathology
NPI 1679809230
2001 MEDICAL PKWY DEPARTMENT OF PATHOLOGY
Annapolis, MD 21401
(443) 481-4254
✔ PECOS✔ Accepts MedicareSame address
Zhengtong Pei, M.D.
Pathology
NPI 1194083659
4831 TESLA DR STE F
Bowie, MD 20715
(240) 737-0080
✔ PECOS✔ Accepts Medicare9.9 mi
Jennifer Collins, M.P.H., D.O.
Pathology
NPI 1518257278
22 S GREENE ST
Baltimore, MD 21201
(410) 328-5555
✔ PECOS✔ Accepts Medicare21 mi
Matthew Gabrielson
Pathology
NPI 1013575075
600 N WOLFE ST
Baltimore, MD 21287
(410) 955-3980
✔ PECOS✔ Accepts Medicare21 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 Anne Arundel Pathology Services, LLC's NPI number?

The NPI number for Anne Arundel Pathology Services, LLC is 1821162181. It was assigned to this organization in the NPPES registry on November 20, 2006.

Where is Anne Arundel Pathology Services, LLC located?

Anne Arundel Pathology Services, LLC is located at 2001 Medical Pkwy, Annapolis, MD 21401. The listed phone number is (443) 481-4250.

What is Anne Arundel Pathology Services, LLC's specialty?

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

Is Anne Arundel Pathology Services, LLC enrolled in Medicare?

Yes. Anne Arundel Pathology Services, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Anne Arundel Pathology Services, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians, all in Pathology, reassign their Medicare billing to Anne Arundel Pathology Services, 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. Of these, 3 practice at this address and 4 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 Anne Arundel Pathology Services, LLC was last updated on October 25, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.