Dr. Zachary Fellows, M.D.
What this data tells you about Dr. Fellows
Dr. Zachary Fellows is an obesity medicine specialist in Carlsbad, CA, with 11 years of NPI registration. Based on federal Medicare data, Dr. Fellows performed 15,178 Medicare services across 807 unique beneficiaries.
Between the years covered by Open Payments, Dr. Fellows received a total of $18,998 from 39 pharmaceutical and/or device companies across 764 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in obesity medicine. 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. Fellows 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 |
|---|---|---|---|
| Golimumab infusion (Simponi Aria) Administration of golimumab medication directly into a vein. This code specifies the dosage amount of 1 milligram for intravenous delivery. |
13,200 | $10 | $30 |
| 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. |
777 | $109 | $250 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
577 | $1 | $15 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
120 | $67 | $300 |
| Limited ultrasound of joint or extremity A focused ultrasound exam of a specific joint or other structure in the arm or leg, excluding blood vessels. |
81 | $37 | $200 |
| Joint fluid aspiration or injection, small joint Removal of fluid from a small joint or injection of medication into a small joint. |
61 | $38 | $140 |
| 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. |
60 | $160 | $279 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
60 | $67 | $200 |
| New patient office visit, complex (60-74 min) | 57 | $181 | $400 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
46 | $67 | $243 |
| Ultrasound-guided small joint aspiration or injection This procedure involves removing fluid from or injecting medication into a small joint while using ultrasound imaging to guide the needle placement. |
37 | $62 | $411 |
| Ultrasound-guided large joint aspiration or injection This procedure uses ultrasound imaging to guide the removal of fluid from or the injection of medication into a large joint. |
36 | $106 | $489 |
| Ultrasound-guided joint aspiration or injection Removal of fluid from or injection into a medium-sized joint using ultrasound guidance to ensure accurate placement. |
30 | $93 | $493 |
| 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. |
24 | $102 | $250 |
| Joint fluid aspiration or injection, medium joint Removal of fluid from a medium-sized joint or injection of medication into the joint space. |
12 | $44 | $173 |
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 (90%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
4.1 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. Fellows is a mixed practice specialist, with above-average Medicare volume (top 7% in CA), with low-engagement industry engagement.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Fellows experienced with golimumab infusion (simponi aria)?
Does Dr. Fellows receive payments from pharmaceutical companies?
How do Dr. Fellows's costs compare to other obesity medicines in Carlsbad?
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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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