William J. Pierce, M.D.

NPI 1083620330ActiveIndividual· Surgery· Lompoc, CA

Surgery (M.D.) in Lompoc, California, trained at University of California, Davis School of Medicine (class of 1993). Mostly services rather than prescriptions: Medicare paid $47,829 for 113 patients in 2024, with only 44 Part D claims. Organogenesis Inc. was the largest of 2 companies reporting payments in 2025, $29.37 in all, mostly food and beverage.

Overview

NPI	1083620330
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	Jul 31, 2006
Last updated in NPPES	Feb 29, 2012

Specialties and licenses

Taxonomy	Code	License	State
Surgery Primary	208600000X	G86834	CA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - General Surgery (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	113
Services billed	306 across 82 procedure codes
Paid by Medicare	$47,829

Part D prescriptions in 2024

Prescriptions (claims)	44 · 46 30-day fills
Patients	33
Total drug cost	$1,543
Generic share	95% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of California, Davis School of Medicine
Graduation year	1993
Medicare specialty	General Surgery
Secondary specialties	General Practice