Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William Owen Lacy, MD

Individual provider Internal Medicine Physician · NPI 1558457796

William Owen Lacy, MD is registered under Pulmonary Disease in Louisville, Kentucky. Graduated from University of Louisville School of Medicine in 1986, 40 years ago. Practices with Community Medical Associates Inc, a 1,365-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Kentucky.

Years since qualifying
40
Trained at
University of Louisville School of Medicine
Licensed in
KY
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4606 Greenwood Rd
Louisville, KY 40258
Phone: (502) 937-2209
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sleep Medicine (Internal Medicine) Physician (primary) Taxonomy 207RS0012X · Licence 28706 (KY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 28706 (KY)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 28706 (KY)

Record details

NPI number1558457796
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESNovember 20, 2024
Certification dateNovember 20, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPULMONARY DISEASE
Also practisesSLEEP MEDICINE
Medical schoolUNIVERSITY OF LOUISVILLE SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Community Medical Associates Inc — 1365 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients810
Services billed 2,007 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,109 12 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Norton Hospitals, Inc Hospital · Louisville, KY
  • Baptist Health Hardin Hospital · Elizabethtown, KY
  • UOFL HEALTH - JEWISH HOSPITAL and Mary & Elizabeth Hospital Hospital · Louisville, KY

Colleagues at Community Medical Associates Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1365 clinicians in the practice; 12 are shown here.

Other providers in Louisville