Dr. Seung Yi Chang, MD

  • Diamond Bar, CA
  • Pain medicine physician
NPI1730342106PAC ID9931356557
Medicare services, 2024
41
Medicare patients, 2024
17
Part D claims, 2024
375
Industry payments
$11,707
Affiliated sites
1
Practice address
21950 Copley Dr, Diamond Bar, CA 91765
Practice phone
Call (626) 840-1023
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Call the Car

Diamond Bar, California

See all 4 affiliations

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Dr. Seung Yi Chang is a pain medicine physician in Diamond Bar, California

Dr. Chang practices at Call the Car in Diamond Bar, California.

Dr. Chang's NPI, 1730342106, was assigned on July 7, 2008. Dr. Chang graduated from St. George's University School of Medicine in 2007. Dr. Chang's Georgia license number on file is 66270.

NPI and contact details
Medicare PAC ID
9931356557
NPI enumeration date
July 7, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(626) 840-1023
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Female
Estimated age
45
Medical school graduation
2007

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Seung Yi Chang practices at Call the Car in Diamond Bar, California

Dr. Chang's primary practice is Call the Car, at 21950 Copley Dr, Diamond Bar, CA 91765 in Los Angeles County. The practice phone is (626) 840-1023.

  • Call the Car
    21950 Copley Dr, Diamond Bar, CA 91765 · Los Angeles CountyPhone(626) 840-1023

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Seung Yi Chang is affiliated with 2 sites of care and 2 medical groups

Dr. Chang's primary practice is Call the Car in Diamond Bar, California. The medical group on file is Integrative Sports & Spine. Dmand AI also links Dr. Chang to 1 more group practice or clinic and 1 medical group, each named with a free account.

See all 4 affiliations for Dr. Chang

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Seung Yi Chang's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Call the CarAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Seung Yi Chang is one of 118 pain medicine physicians in California

Pain medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208VP0000X. The record also lists pain medicine. Dr. Chang is board certified in physical medicine & rehabilitation by the American Board of Physical Medicine and Rehabilitation. Dmand AI has Dr. Chang's licenses on file in 4 states: Georgia, California, New York and Kentucky.

Specialties and state licenses

  • Pain medicine, GeorgiaPrimaryLicense 66270 · 2011 to 2018 · taxonomy 208VP0000X
  • California license2014 to 2026
  • New York license2013 to 2022
  • Kentucky license2012 to 2014

Clinical focus

Dmand AI lists lower back pain among the conditions Dr. Chang treats.

Pain medicine physicians near Dr. Chang

Counts of pain medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Seung Yi Chang billed Medicare for 41 services in 2024

CMS data shows 41 Medicare services from Dr. Chang across 1 procedure code in 2024, all of them office visits, for 17 Medicare patients. Medicare paid $4,239 for them. Every service was in an office.

Medicare services, 202441
Medicare patients17
Paid by Medicare$4,239
Procedure codes1

Dr. Chang's Medicare services by type, 2022 to 2024

  • 2022
  • 2024
Office and hospital visits
2022: 1882024: 4178%

Dr. Chang compared with the California median for pain medicine physicians, 2024

  • Dr. Chang
  • California median
Medicare services
41vs 1,37197% below
Medicare patients
17vs 33495% below
Part D claims
345vs 335Close to median

Medians across 118 pain medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Chang's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Chang

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Seung Yi Chang treated 17 Medicare patients in 2024, average age 70

CMS counts 17 Medicare patients who saw Dr. Chang in 2024. 75% of them have arthritis. Their average risk score is 1.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 56, with 57% women.

Medicare patients, 202417
Average age70
Average risk score1.78

Chronic conditions among Dr. Chang's Medicare patients, 2024

  1. Arthritis75%

Share of Medicare patients with each condition. A patient can have several.

Dr. Chang's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 56

Patient panel by sex, all payers

  • Women57%
  • Men42%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Seung Yi Chang wrote 375 Medicare Part D claims in 2024

In 2024, Dr. Chang wrote 375 Medicare Part D claims for 50 patients. 89% of them were for generic drugs. CMS names the drug for 345 of them, across 15 drugs with 11 or more claims each, at $16,929 in total drug cost. In 2023, CMS named 221 claims across 12 drugs.

Part D claims, 2024375
Drugs named by CMS15
Total drug cost$16,929
Part D patients50

Dr. Chang's Part D claims by kind of drug, 2024

  • Generic333 claims89%
  • Brand-name42 claims11%

Dr. Chang's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Chang's Part D claims, 2024

  • Opioids28%105 of 375 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 2212024: 34556%

Drugs named by CMS: 15 in 2024, 12 in 2023.

See all prescribing by Dr. Chang

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Seung Yi Chang offers telehealth to Medicare patients

Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chang as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Seung Yi Chang received $11,707 in industry payments from 2016 to 2024

CMS Open Payments shows 43 general payments to Dr. Chang from 12 drug and device companies from 2016 to 2024. Grants make up the largest share, 85% of the total. Medtronic, Inc. paid the most, $10,000.

General payments to Dr. Chang by program year, 2016 to 2024

General payments to Dr. Chang by kind, 2016 to 2024

$11.7Kin total
  • Grants$10,00085%
  • Food and beverage$1,53813%
  • Entertainment$1691%

Companies that paid Dr. Chang the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Chang

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Seung Yi Chang graduated from St. George's University School of Medicine

Dr. Chang graduated from St. George's University School of Medicine in 2007.

  1. Medical schoolSt. George's University School of Medicine
  2. Board certified in physical medicine & rehabilitationAmerican Board of Physical Medicine and Rehabilitation

Source: Dmand AI Professional Profile Data

Dr. Seung Yi Chang accepts plans from 15 insurance carriers

Dr. Chang is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • HCSC
  • Alliant Health Plans
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • +7 more carriersWith a free account

Plan types Dr. Chang accepts, by number of carriers

  1. PPO10
  2. Medicare8
  3. HMO6
  4. POS6
  5. EPO4

Source: Dmand AI Insurance Network Data

Sources for Dr. Seung Yi Chang's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Seung Yi Chang

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Seung Yi Chang's NPI number?

Dr. Seung Yi Chang's NPI number is 1730342106. It was assigned on July 7, 2008, and it is active in the NPI Registry.

What kind of doctor is Dr. Seung Yi Chang?

Dr. Seung Yi Chang is a pain medicine physician in Diamond Bar, California. The primary specialty in the NPI Registry is Pain Medicine Physician (taxonomy code 208VP0000X).

Where does Dr. Seung Yi Chang practice?

Dr. Chang practices at 21950 Copley Dr, Diamond Bar, CA 91765. Dr. Chang's primary practice is Call the Car in Diamond Bar, California. Dmand AI also links Dr. Chang to 1 group practice or clinic and 1 medical group.

What is Dr. Seung Yi Chang's office phone number?

The practice phone on file for Dr. Chang is (626) 840-1023.

What is Dr. Seung Yi Chang's medical license number?

Dr. Chang's Georgia license number on file is 66270, one of the licenses on file in 4 states.

Which states has Dr. Seung Yi Chang been licensed in?

Dmand AI has state licenses on file for Dr. Chang in Georgia (2011 to 2018), California (2014 to 2026), New York (2013 to 2022) and Kentucky (2012 to 2014).

What medical group is Dr. Seung Yi Chang part of?

Dr. Chang is linked to Integrative Sports & Spine. Dmand AI links Dr. Chang to 1 more medical group.

Does Dr. Seung Yi Chang accept Medicare?

Yes. CMS data shows Dr. Chang billed Medicare for 41 services in 2024, and Dr. Chang accepts Medicare assignment.

Does Dr. Seung Yi Chang offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.

How many Medicare patients does Dr. Seung Yi Chang see?

CMS counts 17 Medicare patients who saw Dr. Chang in 2024, with an average age of 70.

Show 7 more questionsShow fewer questions

Is Dr. Seung Yi Chang board certified?

Yes. Dr. Chang is board certified in physical medicine & rehabilitation by the American Board of Physical Medicine and Rehabilitation.

What services does Dr. Seung Yi Chang bill to Medicare?

In 2024, Dr. Chang's most billed Medicare services were office visit, established patient (99214).

Where did Dr. Seung Yi Chang go to medical school?

Dr. Chang graduated from St. George's University School of Medicine in 2007.

What drugs does Dr. Seung Yi Chang prescribe most?

In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Methocarbamol, Pregabalin and Tramadol HCl.

Has Dr. Seung Yi Chang received payments from drug or device companies?

CMS Open Payments shows $11,707 in general payments to Dr. Chang from 12 companies from 2016 to 2024. The largest total came from Medtronic, Inc.

How long has Dr. Seung Yi Chang been practicing?

Dr. Chang graduated from medical school in 2007, 19 years ago.

What insurance does Dr. Seung Yi Chang accept?

Dr. Chang is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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