Dr. David Merrill, MD
What this data tells you about Dr. Merrill
Dr. David Merrill is a psychiatry specialist in Los Angeles, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Merrill performed 3,540 Medicare services across 974 unique beneficiaries.
Between the years covered by Open Payments, Dr. Merrill received a total of $2,122 from 25 pharmaceutical and/or device companies across 96 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in psychiatry. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Merrill is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Psychotherapy and evaluation, 30 minutes A combined session involving psychotherapy and an evaluation and management visit lasting 30 minutes. |
934 | $57 | $326 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
759 | $105 | $625 |
| Magnetic field treatment to stimulate brain nerve cells A procedure using a magnetic field to stimulate nerve cells in the brain, including the delivery and management of the treatment. |
598 | $107 | $460 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
394 | $27 | $152 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
301 | $150 | $866 |
| Psychiatric services complicated by communication factor Psychiatric evaluation or treatment provided when communication barriers complicate the interaction between the provider and the patient. |
299 | $12 | $70 |
| New patient office visit, complex (60-74 min) | 48 | $179 | $1,055 |
| 45-minute psychotherapy and evaluation visit A 45-minute session that includes both psychotherapy and an evaluation and management visit. |
39 | $76 | $413 |
| Awake and drowsy EEG A test that records electrical activity in the brain while the patient is awake and drowsy. |
28 | $363 | $1,989 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
28 | $103 | $608 |
| Visual evoked potential test A test that measures how quickly electrical signals travel from the eye to the brain in response to visual stimuli. |
27 | $62 | $340 |
| Psychological test administration, first 30 minutes A technician administers psychological or neuropsychological testing for the first 30 minutes. |
27 | $32 | $187 |
| Magnetic brain stimulation with motor threshold determination A procedure using magnetic fields to stimulate nerve cells in the brain. It includes determining the motor threshold and managing the delivery of the treatment. |
21 | $181 | $907 |
| Magnetic field treatment to stimulate brain nerve cells, initial delivery A procedure that uses a magnetic field to stimulate nerve cells in the brain. This code covers the initial delivery and management of the treatment. |
19 | $193 | $794 |
| Online digital E/M service, established patient, 21+ minutes An online digital evaluation and management service for an established patient. This service requires a total time of 21 or more minutes over a period of up to 7 days. |
18 | $41 | $224 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (98%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Merrill is a clinical cardiology specialist, with above-average Medicare volume (top 2% in CA), with low-engagement industry engagement in the top 18% of CA peers, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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