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MID-MARYLAND UROLOGIC SERVICES
NPI 1871781435
Urology in Frederick, MD

Active since October 09, 2007CLIA 21D1011189 · Microscopy
97 THOMAS JOHNSON DR, SUITE 102, FREDERICK, MD 21702(301) 694-0414(301) 694-0415 Get Directions Write a Review

NPPES record last updated: May 29, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mid-maryland Urologic Services NPPES

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

MID-MARYLAND UROLOGIC SERVICES (NPI 1871781435) is a healthcare organization registered as an urology in Frederick, Maryland and active in the NPI registry since October 2007. The organization holds a CLIA Microscopy certificate valid through April 2, 2027 and lists Bert Edward Williams, Physician/doctor, as its authorized official.

NPPES Registry Identity

NPI1871781435
Entity TypeOrganization
Primary Taxonomy208800000X
Legal Business NameBERT WILLIAMS M.D. LLC
Location Address97 THOMAS JOHNSON DR, SUITE 102Frederick, MD 21702-4379
Mailing Address97 Thomas Johnson Dr, Suite 102Frederick, MD 21702-4379 · (301) 694-0414 · Fax (301) 694-0415
Phone(301) 694-0414
Fax(301) 694-0415
Organization SubpartNo
Authorized OfficialBert Edward WilliamsPhysician/doctor · (301) 694-0414
Enumeration DateOctober 9, 2007
Last NPPES UpdateMay 29, 2014
✔ NPI 1871781435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians
Taxonomy Code208800000X
License✔ Licensed in MD · D0054397
Definition
A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.
97 THOMAS JOHNSON DR, Frederick, MD 21702
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Other Names 1

Doing Business AsMid-maryland Urologic Services

Other Identifiers 1

Medicare PIN544MMD

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)

Mid-maryland Urologic Services 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 Mid-Maryland Urologic Services, which bills Medicare for the services this clinician delivers.

Clinician (1)

Bert Williams, MD
Urology
NPI 1497813208
97 THOMAS JOHNSON DRIVE SUITE 102
Frederick, MD 21702
(301) 694-0414
✔ 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 for Provider-Performed Microscopy Procedures (PPMP) 21D1011189

Mid-Maryland Urologic Services · Frederick, MD
Active · expires Apr 2, 2027
CLIA Number21D1011189
Laboratory TypePhysician Office
Certificate Effective DateApril 3, 2025
Certificate Expiration DateApril 2, 2027
Laboratory DirectorBert E. Williams MD
Laboratory Phone(301) 694-0414
Laboratory LocationMid-Maryland Urologic Services97 Thomas Johnson Drive Ste 102, Frederick, MD 21701
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

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 Bert Williams M.D. LLC's NPI number?

The NPI number for Bert Williams M.D. LLC is 1871781435. It was assigned to this organization in the NPPES registry on October 9, 2007. The provider is doing business as Mid-Maryland Urologic Services.

Where is Bert Williams M.D. LLC located?

Bert Williams M.D. LLC is located at 97 Thomas Johnson Dr Suite 102, Frederick, MD 21702. The listed phone number is (301) 694-0414.

What is Bert Williams M.D. LLC's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Is Bert Williams M.D. LLC enrolled in Medicare?

Yes. Bert Williams M.D. LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Bert Williams M.D. LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Urology) reassigns their Medicare billing to Bert Williams 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 Bert Williams M.D. LLC hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 21D1011189) is associated with this NPI, valid through April 2, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Bert Williams M.D. LLC was last updated on May 29, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.