Dr. Rainier Guiang, M.D.
What this data tells you about Dr. Guiang
Dr. Rainier Guiang is an anesthesiology specialist in Riverside, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Guiang performed 4,141 Medicare services across 891 unique beneficiaries.
Between the years covered by Open Payments, Dr. Guiang received a total of $1,615 from 11 pharmaceutical and/or device companies across 79 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in anesthesiology. 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. Guiang 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 |
|---|---|---|---|
| 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. |
1,725 | $51 | $103 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
1,054 | $1 | $4 |
| Low osmolar contrast material, 100-199 mg/ml iodine concentration, per ml | 840 | $1 | $4 |
| Drug test with direct observation A drug screening test performed under direct observation to ensure the sample is provided correctly. This method is used to verify the integrity of the specimen collection process. |
223 | $12 | $86 |
| Injection into lower spine canal with imaging guidance A procedure where a substance is injected into the lower part of the spinal canal. The injection is performed using imaging guidance to ensure accurate placement. |
150 | $201 | $307 |
| 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. |
53 | $120 | $231 |
| Spinal injection with imaging guidance A procedure where medication is injected into the middle or upper part of the spinal canal. Imaging technology is used to guide the needle to the correct location. |
35 | $218 | $307 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
34 | $49 | $95 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
14 | $81 | $145 |
| Fluoroscopic guidance for needle placement Use of real-time X-ray imaging to guide the precise placement of a needle during a medical procedure. |
13 | $90 | $123 |
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. Guiang is a clinical cardiology specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement in the top 12% 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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