Dr. Chiwai Chan, D.O.
What this data tells you about Dr. Chan
Dr. Chiwai Chan is a pain medicine specialist in Fountain Valley, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Chan performed 53,215 Medicare services across 1,966 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chan received a total of $2,031 from 25 pharmaceutical and/or device companies across 130 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in pain 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. Chan 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 |
|---|---|---|---|
| Contrast dye for imaging, lower concentration | 41,160 | $0 | $5 |
| 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. |
3,809 | $107 | $233 |
| Methylprednisolone acetate injection, 20 mg A 20 mg injection of methylprednisolone acetate, a corticosteroid medication. This code specifies the drug and dosage administered. |
1,855 | $4 | $25 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
1,492 | $66 | $151 |
| Methylprednisolone acetate injection, 80 mg An injection of 80 mg of methylprednisolone acetate, a corticosteroid medication. |
1,087 | $9 | $45 |
| Injection, methylprednisolone acetate, 40 mg | 1,007 | $6 | $40 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
562 | $58 | $178 |
| Viscosupplementation injection for joint An injection of hyaluronic acid or a derivative into a joint to provide lubrication and cushioning. |
522 | $59 | $200 |
| Fluoroscopic guidance for needle placement Use of real-time X-ray imaging to guide the precise placement of a needle during a medical procedure. |
483 | $107 | $183 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
219 | $145 | $422 |
| Sacral spine nerve root injection with imaging guidance An injection of anesthetic and/or steroid medication into a sacral spine nerve root. The procedure uses imaging guidance to ensure accurate placement. |
181 | $331 | $578 |
| Spinal or brain drug pump maintenance A healthcare professional performs maintenance on a drug infusion pump implanted in the spinal canal or brain. |
151 | $100 | $254 |
| Trigger point injection, 3 or more muscles Injection of medication into three or more specific muscle trigger points to relieve pain. |
150 | $53 | $136 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
146 | $222 | $602 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
138 | $52 | $491 |
| New patient office visit, complex (60-74 min) | 75 | $174 | $441 |
| Spine facet joint injection with imaging guidance, single level An injection is administered into a single facet joint of the lower or sacral spine while using imaging guidance to ensure accurate placement. |
43 | $229 | $416 |
| Facet joint injection, second level, with imaging guidance An injection into a lower or sacral spine facet joint using imaging guidance for the second level treated. |
43 | $120 | $204 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
34 | $76 | $158 |
| Spinal nerve root injection with imaging guidance An injection of anesthetic or steroid medication into a single nerve root in the upper or middle spine. The procedure uses imaging guidance to ensure accurate placement. |
33 | $354 | $629 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
25 | $99 | $356 |
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 (100%) 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. Chan is a mixed practice specialist, with above-average Medicare volume (top 2% in CA), with low-engagement industry engagement, with 20 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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