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DR. STEPHEN WILLIAM MADDOCK M.D., PH.D.
NPI 1821060328
General Practice in Fredericksburg, VA

Active since February 07, 2006PECOS Enrolled
10 MARSHALL PL, FREDERICKSBURG, VA 22405(757) 242-1774(417) 247-1774 Get Directions Write a Review

NPPES record last updated: November 4, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Stephen William Maddock M.d., Ph.d. NPPES

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

DR. STEPHEN WILLIAM MADDOCK M.D., PH.D. (NPI 1821060328) is an individual general practice provider in Fredericksburg, Virginia, licensed in Virginia (0101233391) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821060328
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameDR. STEPHEN WILLIAM MADDOCKCredential: M.D., PH.D.
Location Address10 MARSHALL PLFredericksburg, VA 22405-2937
Mailing Address10 Marshall PlFredericksburg, VA 22405-2937 · (757) 242-1774 · Fax (417) 247-1774
Phone(757) 242-1774
Fax(417) 247-1774
Sole ProprietorNo
Enumeration DateFebruary 7, 2006
Last NPPES UpdateNovember 4, 2025
NPPES CertifiedNovember 4, 2025
✔ NPI 1821060328 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in VA · 0101233391
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
10 MARSHALL PL, Fredericksburg, VA 22405
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen William Maddock M.d., Ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Stephen Maddock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mercy Clinic Springfield Communities
758 mi
Rural Health
518 PINE ST
Steelville, MO 65565
  • Reassigned Medicare billing, Missouri enrollment
  • 1,487 clinicians in this Medicare group
NPI 1669504411 (573) 775-5838

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 Stephen Maddock's NPI number?

The NPI number for Stephen Maddock is 1821060328. It was assigned to this individual provider in the NPPES registry on February 7, 2006.

Where is Stephen Maddock located?

Stephen Maddock practices at 10 Marshall Pl, Fredericksburg, VA 22405. The listed phone number is (757) 242-1774.

What is Stephen Maddock's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Stephen Maddock enrolled in Medicare?

Yes. Stephen Maddock is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephen Maddock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Maddock reassigns Medicare benefits to Mercy Clinic Springfield Communities (Steelville, MO). The 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 Stephen Maddock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Stephen Maddock was last updated on November 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.