WILLIAM OWEN LACY MD
NPI 1558457796
Internal Medicine - Sleep Medicine in Louisville, KY

Q: What is William Lacy's NPI number?

The NPI number for William Lacy is 1558457796. It was assigned to this individual provider in the NPPES registry on October 5, 2006.

Q: What is William Lacy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.

Q: When was this NPI record last updated?

The NPPES record for William Lacy was last updated on November 20, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.

Active since October 05, 2006PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

4606 GREENWOOD RD, LOUISVILLE, KY 40258(502) 937-2209 Get Directions Write a Review

NPPES record last updated: November 20, 2024. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Nov 20, 2024, Apr 24, 2024, Oct 23, 2020 and 3 more (6 updates tracked since 2016).

On this page

About William Owen Lacy Md NPPES

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

WILLIAM OWEN LACY MD (NPI 1558457796) is an individual sleep medicine provider in Louisville, Kentucky, licensed in Kentucky (28706) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Baptist Health Hardin, and is a graduate of University Of Louisville School Of Medicine (1986).

NPPES Registry Identity

NPI1558457796

Entity TypeIndividualMale

Primary Taxonomy207RS0012X

Provider Legal NameWILLIAM OWEN LACYCredential: MD

Location Address4606 GREENWOOD RDLouisville, KY 40258

Mailing AddressPo Box 776351Chicago, IL 60677-6351 · (502) 588-9490 · Fax (502) 272-5116

Phone(502) 937-2209

Sole ProprietorNo

Medical School CMSUniversity Of Louisville School Of MedicineGraduated 1986

Enumeration DateOctober 5, 2006

Last NPPES UpdateNovember 20, 20246 updates tracked since enumeration

NPPES CertifiedNovember 20, 2024

✔ NPI 1558457796 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Sleep MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RS0012X

License✔ Licensed in KY · 28706

Definition

An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.

Also ListedInternal MedicineTaxonomy 207R00000X · License 28706 (KY)

Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 28706 (KY)

4606 GREENWOOD RD, Louisville, KY 40258

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Other Identifiers 2

Other200003570IN · Indiana Medicaid

Medicaid64287063KY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Owen Lacy Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3678479300

PECOS Enrollment IDI20050331000111

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.

Areas of Expertise CMS Part B claims 19

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

409 services301 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

270 services244 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

125 services99 patients

Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation G0399

A Home Sleep Test (HST) with a Type III Portable Monitor is an unattended test that records your breathing, heart rate, and oxygen levels during sleep. This test uses a minimum of 4 channels to monitor these parameters, helping to diagnose sleep disorders.

119 services117 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

88 services86 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

79 services75 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

79 services75 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

61 services61 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

58 services54 patients

Sleep study in sleep lab with continuous airway pressure (6 years or older) 95811

A sleep study in a sleep lab with continuous airway pressure is a test for individuals aged 6 and above. It monitors your sleep patterns to check for disorders like sleep apnea. Continuous airway pressure helps keep your airways open while you sleep, improving your breathing.

50 services48 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

43 services43 patients

Sleep study in sleep lab (6 years or older) 95810

A sleep study in a sleep lab is a non-invasive overnight test that monitors your body while you sleep. It helps doctors understand your sleep patterns and identify any issues like sleep apnea or insomnia. You'll be connected to equipment that tracks your heart rate, brain waves, breathing, and movements.

42 services42 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

25 services25 patients

Smoking and tobacco use intensive counseling, 4-10 minutes 99406

This service provides brief, intensive counseling (4-10 minutes) to support you in quitting smoking or tobacco use. It involves discussing the risks of tobacco use, benefits of quitting, and strategies to help you stop. It's a critical step towards a healthier lifestyle.

20 services18 patients

Test to determine lung volumes using sensors 94726

18 services18 patients

Test to examine how well the lungs exchange gases 94729

18 services18 patients

Test to measure the level of nitric oxide gas 95012

A test to measure the level of nitric oxide gas helps assess inflammation in the lungs, often linked with asthma. You'll breathe into a device, and it'll provide a reading of nitric oxide levels. This helps monitor and manage respiratory conditions.

15 services14 patients

Sleep study in sleep lab with continuous airway pressure (6 years or older) 95811

13 services12 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Baptist Health Hardin

Acute Care Hospitals · Elizabethtown, KY

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number180012

Location913 North Dixie AvenueElizabethtown, KY 42701 · Hardin County

Emergency services

Jewish Hospital & St Mary's Healthcare

Acute Care Hospitals · Louisville, KY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number180040

Location200 Abraham Flexner WayLouisville, KY 40202 · Jefferson County

Emergency services

Norton Hospitals, Inc

Acute Care Hospitals · Louisville, KY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number180088

Location200 East Chestnut StreetLouisville, KY 40202 · Jefferson County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 40258 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

$122.77 typical visit price

range $52.76 – $162.27

Typical copayment $30.69 (range $13.19 – $40.56)

Most-billed visit code 99204

Established Patient

$93.94 typical visit price

range $16.53 – $131.99

Typical copayment $23.48 (range $4.13 – $32.99)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Promoting Interoperability

100

Improvement Activities

Referred Medical Equipment & Supplies CMS DME claims 34

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tubing with integrated heating element for use with positive airway pressure device A4604

DME-Other DME · category DE001N

17 suppliers300 claims300 services$32.15 avg. paid by Medicare

Administration set, with small volume nonfiltered pneumatic nebulizer, disposable A7003

DME-Other DME · category DE000N

4 suppliers38 claims76 services$1.22 avg. paid by Medicare

Administration set, with small volume nonfiltered pneumatic nebulizer, non-disposable A7005

DME-Other DME · category DE000N

5 suppliers27 claims27 services$10.03 avg. paid by Medicare

Filter, disposable, used with aerosol compressor or ultrasonic generator A7013

DME-Other DME · category DE000N

3 suppliers11 claims11 services$0.43 avg. paid by Medicare

Full face mask used with positive airway pressure device, each A7030

DME-Other DME · category DE001N

18 suppliers444 claims445 services$71.24 avg. paid by Medicare

Face mask interface, replacement for full face mask, each A7031

DME-Other DME · category DE001N

18 suppliers439 claims1,244 services$26.98 avg. paid by Medicare

Cushion for use on nasal mask interface, replacement only, each A7032

DME-Other DME · category DE001N

16 suppliers246 claims1,402 services$15.32 avg. paid by Medicare

Pillow for use on nasal cannula type interface, replacement only, pair A7033

DME-Other DME · category DE001N

18 suppliers183 claims983 services$11.82 avg. paid by Medicare

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034

DME-Other DME · category DE001N

24 suppliers458 claims458 services$43.27 avg. paid by Medicare

Headgear used with positive airway pressure device A7035

DME-Other DME · category DE001N

25 suppliers512 claims512 services$15.29 avg. paid by Medicare

Chinstrap used with positive airway pressure device A7036

DME-Other DME · category DE001N

6 suppliers41 claims41 services$9.38 avg. paid by Medicare

Tubing used with positive airway pressure device A7037

DME-Other DME · category DE001N

22 suppliers534 claims535 services$9.59 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

27 suppliers827 claims4,700 services$1.64 avg. paid by Medicare

Filter, non disposable, used with positive airway pressure device A7039

DME-Other DME · category DE001N

19 suppliers300 claims300 services$4.90 avg. paid by Medicare

Water chamber for humidifier, used with positive airway pressure device, replacement, each A7046

DME-Other DME · category DE001N

21 suppliers363 claims363 services$10.85 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

9 suppliers213 claims214 services$14.20 avg. paid by Medicare

Portable oxygen contents, gaseous, 1 month's supply = 1 unit E0443

DME-Oxygen and Supplies · category DC000N

3 suppliers28 claims28 services$32.68 avg. paid by Medicare

Respiratory assist device, bi-level pressure capability, without backup rate feature, used with noninvasive interface, e.g., nasal or facial mask (intermittent assist device with continuous positive airway pressure device) E0470

DME-Other DME · category DE001N

8 suppliers100 claims100 services$67.70 avg. paid by Medicare

Respiratory assist device, bi-level pressure capability, with back-up rate feature, used with noninvasive interface, e.g., nasal or facial mask (intermittent assist device with continuous positive airway pressure device) E0471

DME-Other DME · category DE001N

2 suppliers17 claims17 services$183.02 avg. paid by Medicare

High frequency chest wall oscillation system, with full anterior and/or posterior thoracic region receiving simultaneous external oscillation, includes all accessories and supplies, each E0483

DME-Other DME · category DE000N

2 suppliers20 claims20 services$829.55 avg. paid by Medicare

Humidifier, heated, used with positive airway pressure device E0562

DME-Other DME · category DE001N

11 suppliers84 claims84 services$110.45 avg. paid by Medicare

Humidifier, heated, used with positive airway pressure device E0562

DME-Other DME · category DE001N

9 suppliers86 claims91 services$9.50 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

5 suppliers125 claims135 services$3.47 avg. paid by Medicare

Continuous positive airway pressure (cpap) device E0601

DME-Other DME · category DE001N

19 suppliers825 claims836 services$27.46 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

12 suppliers404 claims408 services$61.60 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

3 suppliers35 claims35 services$30.35 avg. paid by Medicare

Arformoterol, inhalation solution, fda approved final product, non-compounded, administered through dme, unit dose form, 15 micrograms J7605

DME-Drugs Administered Through DME · category DG006N

3 suppliers29 claims1,890 services$4.03 avg. paid by Medicare

Formoterol fumarate, inhalation solution, fda approved final product, non-compounded, administered through dme, unit dose form, 20 micrograms J7606

DME-Drugs Administered Through DME · category DG006N

12 suppliers155 claims9,180 services$6.46 avg. paid by Medicare

Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg J7613

DME-Drugs Administered Through DME · category DG006N

22 suppliers84 claims11,043 services$0.03 avg. paid by Medicare

Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620

DME-Drugs Administered Through DME · category DG006N

10 suppliers33 claims4,170 services$0.09 avg. paid by Medicare

Budesonide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, up to 0.5 mg J7626

DME-Drugs Administered Through DME · category DG000N

15 suppliers195 claims11,550 services$0.81 avg. paid by Medicare

Revefenacin inhalation solution, fda-approved final product, non-compounded, administered through dme, 1 microgram J7677

DME-Drugs Administered Through DME · category DG006N

6 suppliers60 claims315,000 services$0.15 avg. paid by Medicare

Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738

DME-Oxygen and Supplies · category DC000N

2 suppliers30 claims30 services$31.12 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

26 suppliers256 claims256 services$25.72 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LORAN PETE MOORE MD

Internal Medicine (Pulmonary Disease)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

ELIZA P TRUWIT NP

Nurse Practitioner (Acute Care)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2206

STEPHANIE PEYTON POWELL APRN

Nurse Practitioner (Acute Care)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

CHEST MEDICINE ASSOCIATES P.S.C.

Internal Medicine (Sleep Medicine)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

MR. TIMOTHY ROBERT KILLEEN M.D.

Internal Medicine (Pulmonary Disease)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

AMBER STARR POYNTER APRN

Nurse Practitioner (Family)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

CHEST MEDICINE ASSOCIATES P.S.C.

Internal Medicine (Pulmonary Disease)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

MRS. LYNNE MARIE OBST APRN

Nurse Practitioner (Family)

4606 GREENWOOD RD
LOUISVILLE, KY 40258

Jefferson County (502) 937-2209

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 Lacy's NPI number?

The NPI number for William Lacy is 1558457796. It was assigned to this individual provider in the NPPES registry on October 5, 2006.

Where is William Lacy located?

William Lacy practices at 4606 Greenwood Rd, Louisville, KY 40258. The listed phone number is (502) 937-2209.

What is William Lacy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.

Is William Lacy enrolled in Medicare?

Yes. William Lacy is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Lacy accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and CareSource list William Lacy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Lacy affiliated with any hospitals?

According to CMS data, William Lacy is affiliated with Baptist Health Hardin, Jewish Hospital & St Mary's Healthcare and Norton Hospitals, Inc.

When was this NPI record last updated?

The NPPES record for William Lacy was last updated on November 20, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.