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- 4606 Greenwood Rd, Louisville, KY 40258
About Dr. Lacy
Based in Louisville, KY, William O. Lacy, MD is listed in the NPI registry under sleep medicine. William graduated from University of Louisville School of Medicine in 1986. William is also listed as specializing in internal medicine and pulmonary disease. According to Medicare claims data, William cared for 1,361 Medicare patients across 1,543 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more. NPI 1558457796 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (502) 937-2209
- Email not available
Practice Locations
4606 GREENWOOD RD
Louisville, KY 40258
Conditions Commonly Evaluated or Treated
Within Sleep Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Breathing disruption
Circadian rhythm
- Antisocial personality disorder
- Delayed Sleep Phase
- Irregular Sleep-Wake Schedule
- Jet Lag Disorder
- Non-24-Hour Body Clock
- Shift Work Sleep Problems
- Sleep problems
Daytime alertness
- Daytime Exhaustion
- Excessive daytime sleepiness
- Excessive Sleeping
- Sleep Grogginess
- Sudden Muscle Weakness When Laughing
Excessive sleepiness
General sleep
General symptoms
Hormonal sleep
Insomnia & anxiety
Movement disorders
Neurological sleep
Parasomnia
- Acting Out Dreams
- Bedwetting
- Chronic Nightmares
- Exploding Head Syndrome
- Hallucinations While Falling Asleep
- Sleep Eating
- Sleep Groaning
- Sleep Paralysis
- Sleep Problems in Kids
- Sleep Talking
- Sleepwalking
Parasomnias
Pediatric sleep
Sleep breathing
Sleep disruption
Sleep movement
Sleep quality
Sleep timing
Procedures & services
Most searched procedures
Behavioral therapy
- Child Sleep Habit Coaching
- CPAP Desensitization Therapy
- Sleep counseling
- Sleep hygiene counseling
- Sleep Restriction Therapy
- Stimulus Control Therapy
Circadian therapy
Consultation
CPAP & positive airway pressure
- Adaptive Servo-Ventilation Setup
- Auto-CPAP Setup
- BiPAP therapy
- CPAP Heated Tubing & Humidifier Setup
- CPAP Mask Fitting
- CPAP Pressure Adjustment
Device management
Devices
Diagnostic testing
- Daytime Nap Study
- Drug-induced sleep endoscopy
- Overnight Oxygen Tracking
- Sleep Alertness Test
- Sleep Tracker Watch Monitoring
Diagnostics
Evaluations
Lifestyle & devices
Medical management
Oral appliances
- Night Guard For Clenching
- Oral Appliance Adjustment
- Sleep Apnea Mouthpiece
- Snoring Mouth Guard Fitting
Respiratory care
Snoring & airway
Surgery
Surgical & implants
- Deviated Septum Surgery For Sleep
- Expansion Sphincter Pharyngoplasty
- Hypoglossal nerve stimulator implantation
- Jaw Advancement Surgery
- Palate Stiffening Procedure
- Tongue Base Reduction Surgery
- Turbinate Shrinking For Breathing
- Uvulopalatopharyngoplasty
Therapy
Procedures Most Often Billed to Medicare
1,543 services · 1,361 patients · 19 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
11 | Less often than most peers in Sleep Medicine |
| X-ray of chest, 2 views | Imaging | 71046 |
25 | Too few peers to compare |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
88 | More often than most peers in Sleep Medicine |
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
79 | More often than most peers in Sleep Medicine |
| Test to determine lung volumes using sensors | Treatment | 94726 |
79 | More often than most peers in Sleep Medicine |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
58 | As often as other peers in Sleep Medicine |
| Sleep study in sleep lab with continuous airway pressure (6 years or older) | Treatment | 95811 |
50 | More often than most peers in Sleep Medicine |
| Sleep study in sleep lab (6 years or older) | Treatment | 95810 |
42 | As often as other peers in Sleep Medicine |
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
18 | More often than most peers in Sleep Medicine |
| Test to determine lung volumes using sensors | Treatment | 94726 |
18 | More often than most peers in Sleep Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other sleep medicines in Louisville 8
Same specialty, same city.
More connections — 14 related providers in 2 groups
Trained at University of Louisville School of Medicine 6
Other providers in the same specialty who trained at the same institution.
Class of 1986 at University of Louisville School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Lacy's specialty?
Dr. Lacy is a sleep medicine in Louisville, KY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Lacy?
Dr. Lacy is listed at 4606 Greenwood Rd, Louisville, KY 40258. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Lacy?
The number on file is (502) 937-2209. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Lacy's NPI number?
Dr. Lacy's National Provider Identifier is 1558457796. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Lacy's medical education?
Dr. Lacy attended University of Louisville School of Medicine, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Lacy been practicing?
Dr. Lacy has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Lacy known for?
According to Medicare billing data, Dr. Lacy performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of chest, 2 views; provides treatments such as test to measure expiratory airflow and volume and test to examine how well the lungs exchange gases, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Lacy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Lacy. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.