Who Paid My Doc
Michael Chang
Orthopaedic Surgery of the Spine Mesa, AZ Medical Doctor
NPI 1154522910 CMS profile 52618
1462 S. Dobson Road, Suite 201, Mesa, AZ 85202
General payments
$692,015
Research payments
$0
Ownership & investment interest
$2,708,008
Research they led as principal investigator
$63,498
Through program year 2025, Michael Chang of Mesa, AZ is reported in the CMS Open Payments database as having received $692,015 across 600 general payments and $0 in research payments paid to them. Separately, studies naming them as principal investigator received $63,498 in research payments, paid to institutions rather than to them. They also declared ownership or investment interests valued at $2,708,008 across 15 holdings.
No combined total General, research and ownership are kept apart. Each is reported under its own rules, and ownership is not money that moved at all but the value of a stake held. A meal, a clinical trial grant and a shareholding do not add up to anything meaningful, so this site does not add them. The principal-investigator line is research money paid to institutions for studies they led — not to them — and is not added to anything either.
General payments for this record sit in the 92nd percentile of Orthopaedic Surgery of the Spine profiles with reported payments. Percentile describes the distribution, not the conduct.
By program year
14 rows| Year | Kind | Relative to this record's peak year | Amount | Records |
|---|---|---|---|---|
| 2025 | General | $136,798 | 79 | |
| 2024 | General | $80,742 | 60 | |
| 2023 | General | $141,841 | 91 | |
| 2022 | General | $114,535 | 88 | |
| 2021 | General | $49,974 | 101 | |
| 2020 | General | $57,465 | 79 | |
| 2019 | General | $110,661 | 102 | |
| 2025 | Ownership | $261,289 | 3 | |
| 2024 | Ownership | $350,688 | 2 | |
| 2023 | Ownership | $365,344 | 2 | |
| 2022 | Ownership | $413,207 | 2 | |
| 2021 | Ownership | $423,016 | 2 | |
| 2020 | Ownership | $370,934 | 2 | |
| 2019 | Ownership | $523,529 | 2 |
Beside peers
- Michael Chang
- Orthopaedic Surgery of the Spine median
- Middle half of Orthopaedic Surgery of the Spine
- National median
In program year 2025, general payments to Michael Chang were reported at $136,798. Among 1,704 Orthopaedic Surgery of the Spine profiles paid that year, the median was $2,061 and the middle half received between $347 and $14,651.
Show as a table
| Year | Michael Chang | Orthopaedic Surgery of the Spine median | Middle half | National median |
|---|---|---|---|---|
| 2019 | $110,661 | $2,106 | $337–$18,608 | $163 |
| 2020 | $57,465 | $1,213 | $156–$15,082 | $114 |
| 2021 | $49,974 | $1,834 | $271–$15,617 | $132 |
| 2022 | $114,535 | $2,015 | $320–$17,036 | $149 |
| 2023 | $141,841 | $1,925 | $336–$14,599 | $160 |
| 2024 | $80,742 | $2,110 | $341–$12,483 | $164 |
| 2025 | $136,798 | $2,061 | $347–$14,651 | $169 |
Breakdown
A payment can name more than one product, so these amounts overlap and do not add up to the general-payment figure.
Prescribing to Medicare patients
Part D · data year 2024 · 5 drugsPart D claims
113
Drug cost
$137,561
Branded share of claims
24.8%
| Drug | Type | Relative to their largest | Claims | Drug cost |
|---|---|---|---|---|
| Forteo Teriparatide | Brand | 17 | $70,097 | |
| Teriparatide | Generic | 15 | $39,086 | |
| Tymlos Abaloparatide | Brand | 11 | $27,334 | |
| Celecoxib | Generic | 31 | $646 | |
| Naproxen | Generic | 39 | $397 |
Drug cost is what was paid for the drugs at the pharmacy — by Medicare, the patient and others — and is not money to the prescriber. Medicare Part D only: drugs dispensed to Medicare beneficiaries. A drug with fewer than 11 claims for this prescriber is not published, so a missing drug does not mean zero. The medians are for the 18,934 Part D prescribers listed as Orthopedic Surgery; they describe a distribution and say nothing about conduct.
Billing to Medicare
Part B · data year 2024 · 66 billing codesPaid by Medicare
$331,850
Medicare patients
171
Services billed
974
| Condition among their Medicare patients | Relative to the most common | Share of patients |
|---|---|---|
| High blood pressure | 75% | |
| Arthritis | 75% | |
| Ischemic heart disease | 36% | |
| Depression | 35% | |
| Osteoporosis | 32% | |
| Diabetes | 25% | |
| Chronic kidney disease | 25% | |
| Atrial fibrillation | 21% |
Medicare Part B only: services billed to Medicare. Rows covering fewer than 11 beneficiaries are not published. Only drugs given in the clinic are itemised here; the rest of what this provider billed is in the total above.
Payments and prescribing
1 product · payments 2024Two separate records. The payments come from Open Payments and the claims from Medicare. They are set side by side because they name the same product; they do not show that a payment affected a prescription.
| Product | Paid by | Related payments | Part D claims | Part B services |
|---|---|---|---|---|
| Tymlos |
|
$15 | 11 | — |
A dash means Medicare published no figure for this doctor and product — fewer than 11 claims, or the product is not covered under that part — which is not the same as none. Payments are general payments only; one that names several products is split evenly between them, so an amount is payments related to the product, not money paid for it.
Records
600 reportedEvery payment, record by record
Date, company, amount, what it was for and the product named — filter by year, kind and company, or download as CSV.
Other Orthopaedic Surgery of the Spine in Arizona
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Orthopaedic Surgery of the Spine · Phoenix, AZ
John Hall
Orthopaedic Surgery of the Spine · Flagstaff, AZ
Nima Salari
Orthopaedic Surgery of the Spine · Phoenix, AZ
Harvinder Bedi
Orthopaedic Surgery of the Spine · Phoenix, AZ
Todd Doerr
Orthopaedic Surgery of the Spine · Scottsdale, AZ
Mark Wang
Orthopaedic Surgery of the Spine · Phoenix, AZ
Related records
Orthopaedic Surgery of the Spine in Arizona
Practitioners in the same specialty and state, ranked by reported value.
All Orthopaedic Surgery of the Spine
Everyone recorded under this specialty, nationwide.
Doctors in Arizona
Every practitioner in the state with a reported payment.
How to read this page
What each amount means, and what it does not mean.
What this means
U.S. law requires drug and medical device manufacturers to report payments and transfers of value they make to physicians and teaching hospitals. The Centers for Medicare & Medicaid Services publishes that record each year. This page shows what was reported about this person, and nothing else.
An ownership interest is different from the other two. It is not a payment: it is a stake — shares, options, a partnership holding — that a physician or an immediate family member held in a manufacturer during that year. The figure shown is what the stake was reported to be worth.
Research payments frequently pass through a clinician to the institution running a trial, and rarely represent personal income. They should be read differently from general payments.