John Hall Farley, M.D.

NPI 1427034578ActiveIndividual· Obstetrics & Gynecology, Gynecologic Oncology· Phoenix, AZ

Obstetrics & Gynecology, Gynecologic Oncology (M.D.) in Phoenix, Arizona, trained at Uniformed Services Uhs Fe Hebert School of Med (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $729,717 for 269 claims, against $27,263 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 3 companies reporting payments in 2025, $11,157 in all, mostly consulting fees.

Overview

NPI	1427034578
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	Dec 21, 2005
Last updated in NPPES	Jun 8, 2026
Certified by provider	Jun 8, 2026

Specialties and licenses

Taxonomy	Code	License	State
Obstetrics & Gynecology, Gynecologic Oncology Primary	207VX0201X	44143	AZ
Obstetrics & Gynecology	207V00000X	44143	AZ

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Oct 9, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026	No match	—
New York OMIG · Nov 10, 2026	No match	—
Ohio Medicaid · Nov 10, 2026	No match	—
Pennsylvania Medicheck · Nov 10, 2026	No match	—
Washington HCA · Nov 10, 2026	No match	—

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Gynecological Oncology (AZ)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	121
Services billed	287 across 25 procedure codes
Paid by Medicare	$27,263

Part D prescriptions in 2024

Prescriptions (claims)	269 · 328 30-day fills
Patients	65
Total drug cost	$729,717
Generic share	83% of claims

Medicare sources and data years

Education and affiliations

Medical school	Uniformed Services Uhs Fe Hebert School of Med
Graduation year	1990
Medicare specialty	Gynecological Oncology
Secondary specialties	Obstetrics/Gynecology