Dollars for Docs

How Industry Dollars Reach Your Doctors

MICHAEL Y CHANG
Is This Your Doctor?

MICHAEL Y CHANG

Listed Specialty: Pain Medicine
2405 SHADELANDS DR, WALNUT CREEK, CA, 94598-2444
Is This Your Doctor?

MICHAEL CHANG,
Yearly Payment Breakdown:

All Payments: At a Glance

2016

16

payments

$474

payment total

7

companies paid this doctor
2015

18

payments

$1,125

payment total

8

companies paid this doctor
2014

26

payments

$749

payment total

9

companies paid this doctor
2013

13

payments

$214

payment total

6

companies paid this doctor

Payment Calendar in

This doctor received a payment on days in .

Each box below represents a single day during the disclosure period. A gray box indicates no payments. The darker the color, the more payments a doctor received that day.

Types of Payments in

Category Payments Payment Value
Food and Beverage
25 $738
Food and Beverage
17 $648
Consulting
1 $478
Food and Beverage
16 $474
Food and Beverage
12 $198
Education
1 $16
Travel and Lodging
1 $11

Drugs & Devices in

Totals listed below account for all payments from that mention this product. Beginning in 2016, the government began classifying products as drugs, devices, biologics or medical supplies. Below, you will see drugs (drugs and biologics) and devices (devices and medical supplies). If a payment record mentions more than one product, the entire value will be included in each of those products. When no products are listed, they are not included in the list below.

This physician does not have any payments relating to a specific drug or device for this year.

Product Name Product Type Payments
KYPHON BALLOON KYPHOPLASTY

device

$319
SENZA SPINAL CORD STIMULATION SYSTEM

device

$38
DUEXIS

drug

$25
PICO

device

$23
GELSYN 3

device

$19
SMARTPILL

device

$19
EXOGEN

device

$19
SPECTRA SYSTEM

device

$11
† May not add up to dollar total at top of page, since a payment record may not be associated with any product or can be associated with several products.
Product Name Product Type Payments
PAIN THERAPIES

device

$478
INTERVENTIONAL THERAPIES

device

$453
PAIN MANAGEMENT

device

$49
SURGICAL ENERGY PRODUCTS

device

$45
BIOLOGICS

device

$24
OSTEOARTHRITIS OF THE KNEE

device

$24
CHRONIC PAIN RADIOFREQ PRODUCTS

device

$23
DUEXIS

drug

$18
IFUSE IMPLANT

device

$12
† May not add up to dollar total at top of page, since a payment record may not be associated with any product or can be associated with several products.
Product Name Product Type Payments
PAIN MANAGEMENT

device

$237
INTERVENTIONAL WITH PROLIA

drug

$176
CHRONIC PAIN RADIOFREQ PRODUCTS

device

$114
TOTALIS

device

$114
SPINAL CORD NEUROSTIMULATION

device

$75
INTERVENTIONAL THERAPIES

device

$73
VBA

device

$24
KIVA VCF TREATMENT SYSTEM

device

$16
BLAZER VERTEBRAL AUGMENTATION KIT

device

$16
CELEBREX

drug

$13
NEURO-CHRONIC PAIN

device

$11
XARELTO

drug

$10
† May not add up to dollar total at top of page, since a payment record may not be associated with any product or can be associated with several products.
Product Name Product Type Payments
PROLIA

drug

$60
INTERVENTIONAL THERAPIES

device

$35
PAIN MANAGEMENT

device

$33
HORIZANT

drug

$32
ENBREL

drug

$22
SPINAL CORD NEUROSTIMULATION

device

$16
DUEXIS

drug

$16
† May not add up to dollar total at top of page, since a payment record may not be associated with any product or can be associated with several products.

Payment Details in

When How Much Related To What For From Third Party Payee
Aug 28, 2015 $478

PAIN THERAPIES Consulting MEDTRONIC SOFAMOR DANEK USA, INC.
Jun 30, 2016 $144

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Aug 7, 2015 $143

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 21, 2014 $114

CHRONIC PAIN RADIOFREQ PRODUCTS PAIN MANAGEMENT Food and Beverage HALYARD HEALTH, INC.
May 28, 2015 $100

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 5, 2014 $91

TOTALIS Food and Beverage VERTIFLEX, INC.
Jul 7, 2015 $77

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 17, 2014 $75

INTERVENTIONAL WITH PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Oct 28, 2015 $71

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 5, 2014 $64

SPINAL CORD NEUROSTIMULATION Food and Beverage MEDTRONIC USA, INC.
May 19, 2014 $62

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Jul 2, 2014 $55

INTERVENTIONAL WITH PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Dec 29, 2016 $49

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Jun 12, 2015 $45

SURGICAL ENERGY PRODUCTS Food and Beverage OLYMPUS AMERICA INC.
Aug 26, 2016 $40

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Nov 7, 2015 $39

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Jun 30, 2016 $38

SENZA SPINAL CORD STIMULATION SYSTEM Food and Beverage NEVRO CORP
Oct 13, 2015 $37

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Nov 11, 2016 $32

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Feb 3, 2014 $30

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Nov 10, 2015 $24

OSTEOARTHRITIS OF THE KNEE Food and Beverage SANOFI-AVENTIS U.S. LLC
Jul 30, 2014 $24

VBA Food and Beverage

Additional details on this payment →

RELATED TO PRODUCT TRAINING ACTIVITY

DEPUY SYNTHES SALES INC.
Dec 14, 2016 $23

PICO Food and Beverage SMITH & NEPHEW, INC.
Oct 1, 2014 $23

TOTALIS Food and Beverage VERTIFLEX, INC.
May 14, 2015 $23

CHRONIC PAIN RADIOFREQ PRODUCTS Food and Beverage HALYARD HEALTH, INC.
Mar 15, 2014 $23

INTERVENTIONAL WITH PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Sep 23, 2013 $22

ENBREL Food and Beverage AMGEN INC.
Oct 16, 2013 $21

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Oct 21, 2013 $21

PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Aug 7, 2013 $20

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Nov 10, 2016 $20

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Nov 10, 2016 $19

GELSYN 3 Food and Beverage BIOVENTUS LLC
Jul 20, 2016 $19

SMARTPILL Food and Beverage COVIDIEN LP
Mar 22, 2016 $19

EXOGEN Food and Beverage BIOVENTUS LLC
Jun 25, 2014 $19

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Oct 21, 2015 $18

DUEXIS Food and Beverage HORIZON PHARMA PLC
Oct 2, 2013 $18

HORIZANT Food and Beverage XENOPORT INC.
Nov 12, 2014 $17

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Oct 15, 2013 $16

SPINAL CORD NEUROSTIMULATION Food and Beverage MEDTRONIC USA, INC.
Sep 16, 2013 $16

PROLIA Education AMGEN INC.
Nov 5, 2014 $16

BLAZER VERTEBRAL AUGMENTATION KIT KIVA VCF TREATMENT SYSTEM Food and Beverage BENVENUE MEDICAL INC
Aug 12, 2016 $16

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Nov 14, 2013 $16

DUEXIS Food and Beverage HORIZON PHARMA USA, INC.
Sep 12, 2013 $15

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Jul 11, 2015 $15

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Sep 27, 2013 $14

HORIZANT Food and Beverage XENOPORT INC.
Jun 1, 2016 $14

DUEXIS Food and Beverage HORIZON PHARMA PLC
Jul 31, 2015 $14

BIOLOGICS Food and Beverage WRIGHT MEDICAL TECHNOLOGY, INC.
Jan 21, 2014 $13

CELEBREX Food and Beverage PFIZER INC.
Dec 9, 2014 $13

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Nov 26, 2014 $13

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Nov 25, 2013 $13

PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Sep 11, 2013 $12

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Sep 4, 2014 $12

INTERVENTIONAL WITH PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 28, 2015 $12

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Apr 30, 2014 $12

INTERVENTIONAL WITH PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Oct 15, 2015 $12

IFUSE IMPLANT Food and Beverage SI-BONE, INC.
Aug 10, 2016 $11

DUEXIS Food and Beverage HORIZON PHARMA PLC
Aug 11, 2016 $11

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
May 17, 2016 $11

SPECTRA SYSTEM Food and Beverage BOSTON SCIENTIFIC CORPORATION
Apr 9, 2014 $11

SPINAL CORD NEUROSTIMULATION Travel and Lodging MEDTRONIC USA, INC.
Jan 21, 2014 $11

NEURO-CHRONIC PAIN Food and Beverage ST. JUDE MEDICAL, INC.
Jul 29, 2014 $11

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Jan 29, 2015 $11

BIOLOGICS Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Nov 13, 2014 $10

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
May 28, 2014 $10

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Sep 5, 2013 $10

PROLIA Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Sep 23, 2014 $10

XARELTO Food and Beverage

Additional details on this payment →

RELATED TO PRODUCT TRAINING ACTIVITY

DEPUY SYNTHES SALES INC.
Nov 4, 2015 $9

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Apr 8, 2014 $8

PAIN MANAGEMENT Food and Beverage BOSTON SCIENTIFIC CORPORATION
Jun 28, 2016 $8

KYPHON BALLOON KYPHOPLASTY Food and Beverage MEDTRONIC USA, INC.
Nov 26, 2014 $4

INTERVENTIONAL THERAPIES Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
Jan 29, 2015 $0

BIOLOGICS Food and Beverage MEDTRONIC SOFAMOR DANEK USA, INC.
See this doctor’s Open Payments page →

Note: We have made some effort to normalize the data and eliminate duplicates, but data is primarily as it has been reported by the companies to the Centers for Medicare and Medicaid Services. To purchase the normalized data, please visit the ProPublica Data Store. If you spot an error, please let us know at [email protected].