William Owen Lacy, MD
Sleep Medicine (Internal Medicine) Physician · Louisville, KY
William Owen Lacy, MD is a sleep medicine (internal medicine) physician with a practice address in Louisville, Kentucky, and NPI 1558457796, issued on Oct 5, 2006. Check the license (Kentucky 28706, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- William Owen Lacy
- Credential
- MD
- Primary taxonomy
- Sleep Medicine (Internal Medicine) Physician 207RS0012X
- License number
- 28706 KY
Self-reported in NPPES; status is on the state search - Practice location
- 4606 Greenwood RD, Louisville, KY 40258
- Phone
- (502) 937-2209
- Enumerated
- Oct 5, 2006
- Record last updated
- Nov 20, 2024
- Medicaid ID
- 64287063 KY
- Medicare enrollment
- Enrolled (PECOS I20050331000111); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 4606 Greenwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Killeen, M.D.Pulmonary Disease Physician1730187790
- Loran Moore, MDPulmonary Disease Physician1376639518
- Lynne Obst, APRNFamily Nurse Practitioner1972833069
- Stephanie Powell, APRNAcute Care Nurse Practitioner1457534000
- Amber Poynter, APRNFamily Nurse Practitioner1891169744
- Eliza Truwit, NPAcute Care Nurse Practitioner1427527415
Verify William Owen Lacy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 28706Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.7 times the Medicare Part D claims of the average sleep medicine (internal medicine) physician in 2024
4,481 Medicare Part D claims for 721 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D. Brand-name drugs were 71% of claims.
Most prescribed
- Trelegy Ellipta1,055 claims
- Albuterol Sulfate Hfa637 claims
- Prednisone236 claims
- Stiolto Respimat234 claims
- Breztri Aerosphere227 claims
- Ventolin Hfa197 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $563.62
8 payments; by number, the most common kind was food and beverage; the largest payer was Inspire Medical Systems, Inc. The 664 providers of this specialty with any payment received $3,724.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Community Medical Associates IncLouisville, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sleep Medicine (Internal Medicine) Physician providers in Kentucky
There are 22 sleep medicine (internal medicine) physician records in Kentucky.
Other sleep medicine (internal medicine) physician records in Kentucky
- Ammar Almasalkhi, MDLouisville, KY1447230651
- Kenneth Anderson, MDLouisville, KY1205800034
- Surya Boopathy, MDLouisville, KY1689137234
- Aumi Brahmbhatt, MDBowling Green, KY1457910895
- Sarika ChandiramaniLouisville, KY1760800031
- David Hiestand, MDLexington, KY1588673370
- Robert Karman, M.D.Louisville, KY1588695886
- Ramanarao Mettu, MDPikeville, KY1679568281
- Patricia Miles, M.D.Florence, KY1104860162
- Courtney Minor, MDLouisville, KY1841640331
Common questions
What is William Owen Lacy, MD's NPI number?
William Owen Lacy, MD's National Provider Identifier (NPI) is 1558457796, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Owen Lacy, MD located?
The NPPES record lists a practice address at 4606 Greenwood RD, Louisville, KY, 40258. Phone: (502) 937-2209. Providers update this record themselves, so call before visiting.
How can I verify William Owen Lacy, MD's license?
NPPES lists Kentucky license number 28706, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Owen Lacy, MD prescribe under Medicare Part D?
In 2024, William Owen Lacy, MD had 4,481 Medicare Part D claims for 721 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. Part D covers Medicare prescriptions only.
What is William Owen Lacy, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.