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DR. WILLIAM ANDERSON HAMILTON MD
NPI 1265456214
Obstetrics & Gynecology in Fredericksburg, VA

Active since July 26, 2006PECOS Enrolled
309 HANOVER ST, FREDERICKSBURG, VA 22401(540) 429-6141 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. William Anderson Hamilton Md NPPES

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

DR. WILLIAM ANDERSON HAMILTON MD (NPI 1265456214) is an individual obstetrics & gynecology provider in Fredericksburg, Virginia, licensed in Virginia (0101053063) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1265456214
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. WILLIAM ANDERSON HAMILTONCredential: MD
Location Address309 HANOVER STFredericksburg, VA 22401-5934
Mailing Address309 Hanover StFredericksburg, VA 22401-5934 · (540) 429-6141
Phone(540) 429-6141
Sole ProprietorYes
Enumeration DateJuly 26, 2006
Last NPPES UpdateJuly 21, 2022
NPPES CertifiedJuly 21, 2022
✔ NPI 1265456214 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in VA · 0101053063
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
309 HANOVER ST, Fredericksburg, VA 22401
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Other Identifiers 1

Medicaid006209246VA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Anderson Hamilton Md 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 Reassignments

4

Medicare enrollment records show William Hamilton reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

New Beginnings Ob Gyn PC
0.4 mi
Obstetrics & Gynecology
600 LAFAYETTE BLVD STE 100
Fredericksburg, VA 22401
  • Reassigned Medicare billing, Virginia enrollment
  • 8 clinicians in this Medicare group
NPI 1548299324 (540) 370-4380
Virginia Physicians For Women Ltd
55 mi
Obstetrics & Gynecology
1212 KOGER CENTER BLVD
North Chesterfield, VA 23235
  • Reassigned Medicare billing, Virginia enrollment
  • 90 clinicians in this Medicare group
NPI 1639137979 (804) 897-2100
Obhg Virginia, LLC
59 mi
Obstetrics & Gynecology
13700 ST FRANCIS BLVD, SUITE 100
Midlothian, VA 23114
  • Reassigned Medicare billing, Virginia enrollment
  • 315 clinicians in this Medicare group
NPI 1972807394 (800) 967-2289
Bayview Physician Services, PC
115 mi
Family Medicine
3241 WESTERN BRANCH BLVD
Chesapeake, VA 23321
  • Reassigned Medicare billing, Virginia enrollment
  • 570 clinicians in this Medicare group
NPI 1508813387 (757) 686-3508

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$70.08 typical visit price
range $18.07 – $138.91
Typical copayment $17.52 (range $4.51 – $34.72)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 William Hamilton's NPI number?

The NPI number for William Hamilton is 1265456214. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Where is William Hamilton located?

William Hamilton practices at 309 Hanover St, Fredericksburg, VA 22401. The listed phone number is (540) 429-6141.

What is William Hamilton's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is William Hamilton enrolled in Medicare?

Yes. William Hamilton is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Hamilton's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Hamilton reassigns Medicare benefits to 4 organizations: New Beginnings Ob Gyn PC (Fredericksburg, VA), Virginia Physicians For Women Ltd (North Chesterfield, VA), Obhg Virginia, LLC (Midlothian, VA) and Bayview Physician Services, PC (Chesapeake, VA). Each 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 William Hamilton'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 William Hamilton was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.