Dr. Mark Hsiao, M.D.
What this data tells you about Dr. Hsiao
Dr. Mark Hsiao is an orthopaedic surgery of the spine physician in Alhambra, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Hsiao performed 5,459 Medicare services across 1,987 unique beneficiaries.
Between the years covered by Open Payments, Dr. Hsiao received a total of $17,989 from 19 pharmaceutical and/or device companies across 63 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in orthopaedic surgery of the spine physician. The majority of payments are classified as research and scientific activities (grants and research funding). Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Hsiao 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 |
|---|---|---|---|
| Electrical stimulation therapy Application of electrical stimulation to one or more body areas as part of a therapy plan. This procedure is used for indications other than wound care. |
1,138 | $7 | $30 |
| Physical therapy exercise, per 15 min A therapy session using exercises to improve strength, endurance, range of motion, and flexibility. Each 15-minute unit is billed separately. |
1,114 | $22 | $80 |
| 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. |
852 | $72 | $175 |
| Manual therapy (hands-on treatment), per 15 min | 515 | $17 | $80 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
329 | $33 | $120 |
| Mechanical traction application Application of mechanical traction to the body. This procedure involves the use of a mechanical device to apply a pulling force. |
327 | $10 | $40 |
| Neuromuscular re-education therapy, per 15 min A therapy procedure designed to re-educate the functional connection between the brain, nerves, and muscles. It is billed in 15-minute increments. |
224 | $29 | $80 |
| Therapeutic massage, per 15 minutes A therapy procedure involving massage techniques. The code covers each 15-minute increment of the service. |
204 | $26 | $50 |
| 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. |
157 | $69 | $360 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
93 | $40 | $80 |
| X-ray of upper spine, 2-3 views An X-ray imaging test of the upper spine using two to three different angles to visualize the bones and structures. |
89 | $34 | $100 |
| Evaluation for physical therapy, typically 20 minutes | 88 | $74 | $125 |
| Ultrasound therapy, each 15 minutes Application of ultrasound waves to tissue for therapeutic purposes. The procedure is billed in 15-minute increments. |
60 | $9 | $30 |
| Orthovisc intra-articular injection An injection of hyaluronan or its derivative into a joint space to provide lubrication and cushioning. |
56 | $103 | $650 |
| Initial hospital admission, low complexity Initial hospital inpatient or observation care for a new patient involving straightforward or low-level medical decision making, with at least 40 minutes total time on the date of the encounter. |
49 | $69 | $160 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
39 | $74 | $234 |
| Knee X-ray, 1-2 views An X-ray imaging test of the knee joint using one to two different angles to visualize the bones and surrounding structures. |
31 | $25 | $88 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
27 | $25 | $115 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
21 | $29 | $95 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
18 | $93 | $250 |
| X-ray of middle spine, 2 views An X-ray imaging test that produces two views of the middle section of the spine to visualize the bones and joints. |
16 | $28 | $115 |
| Evaluation for physical therapy, typically 30 minutes | 12 | $74 | $125 |
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 ›
The majority of payments (67%) are classified as scientific/research, suggesting involvement in clinical studies, grants, or innovation-related work.
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. Hsiao is a clinical cardiology specialist, with above-average Medicare volume (top 2% in CA), with research-focused industry engagement, 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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