Dr. Tien-Yu Y. Chang, MD
- Medicare services, 2024
- 171
- Medicare patients, 2024
- 299
- Hospital affiliations
- 1
- Industry payments
- $2,652
- Medical groups
- 2
- Practice address
- 2121 Santa Monica Blvd, Santa Monica, CA 90404
- Practice phone
- Call (310) 829-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Tien-Yu Y. Chang is an anesthesiologist in Santa Monica, California
Dr. Chang practices at Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services.
Dr. Chang's NPI, 1225213515, was assigned on January 4, 2008. Dr. Chang graduated from Keck School of Medicine of USC in 2003. Dr. Chang holds California license A93643.
- NPI
- 1225213515NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103905120
- NPI enumeration date
- January 4, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 829-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tien-Yu Y. Chang practices at Providence Saint John's Health Center in Santa Monica, California
Dr. Chang's primary practice is Providence Saint John's Health Center, at 2121 Santa Monica Blvd, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 829-5511.
- Providence Saint John's Health Center2121 Santa Monica Blvd, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 829-5511
Source: Dmand AI Affiliation Data
Dr. Tien-Yu Y. Chang is affiliated with 1 site of care and 2 medical groups
Dr. Chang's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. The medical group on file is Bayside Anesthesia Medical Group. Dmand AI also links Dr. Chang to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tien-Yu Y. 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.
| Site | EHR vendor and product |
|---|---|
| Providence Saint John's Health Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tien-Yu Y. Chang is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Chang is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
- Washington license
Anesthesiologists near Dr. Chang
Counts of anesthesiologists 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. Tien-Yu Y. Chang billed Medicare for 171 services in 2024
CMS data shows 171 Medicare services from Dr. Chang across 9 procedure codes in 2024, for 299 Medicare patients. Medicare paid $38,833 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1492024: 11324%
- Surgery
- 2023: 532024: 589%
- Office and hospital visits
- 2023: 142024: 0100%
Dr. Chang compared with the California median for anesthesiologists, 2024
- Dr. Chang
- California median
- Medicare services
- 171vs 722.4 times
- Medicare patients
- 299vs 1432.1 times
Medians across 5,562 anesthesiologists 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tien-Yu Y. Chang treated 299 Medicare patients in 2024, average age 77
CMS counts 299 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 130 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 64, with 56% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chang's Medicare patients by sex, 2024
- Women15753%
- Men14247%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis72%
- Ischemic heart disease47%
- Diabetes32%
- Atrial fibrillation31%
- Mood disorders31%
- Cancer30%
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 64
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Tien-Yu Y. Chang takes part in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Tien-Yu Y. Chang received $2,652 in industry payments from 2016 to 2024
CMS Open Payments shows 52 general payments to Dr. Chang from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 98% of the total. Merck Sharp & Dohme Corporation paid the most, $488.
General payments to Dr. Chang by program year, 2016 to 2024
General payments to Dr. Chang by kind, 2016 to 2024
- Food and beverage$2,61098%
- Education$422%
Companies that paid Dr. Chang the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Tien-Yu Y. Chang graduated from Keck School of Medicine of USC
Dr. Chang graduated from Keck School of Medicine of USC in 2003.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Tien-Yu Y. Chang accepts plans from 2 insurance carriers
Dr. Chang is in network with 2 carriers, including CMS Medicare and NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
- NV State Medicaid
Plan types Dr. Chang accepts, by number of carriers
- Medicaid1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Tien-Yu Y. Chang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Tien-Yu Y. 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. Tien-Yu Y. Chang's NPI number?
Dr. Tien-Yu Y. Chang's NPI number is 1225213515. It was assigned on January 4, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Tien-Yu Y. Chang?
Dr. Tien-Yu Y. Chang is an anesthesiologist in Santa Monica, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Tien-Yu Y. Chang practice?
Dr. Chang practices at 2121 Santa Monica Blvd, Santa Monica, CA 90404. Dr. Chang's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. Dmand AI also links Dr. Chang to 1 medical group.
What is Dr. Tien-Yu Y. Chang's office phone number?
The practice phone on file for Dr. Chang is (310) 829-5511.
What is Dr. Tien-Yu Y. Chang's medical license number?
Dr. Chang holds California license A93643, one of the licenses on file in 2 states.
Which states has Dr. Tien-Yu Y. Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California (2005 to 2027) and Washington (2003 to 2004).
Which hospitals is Dr. Tien-Yu Y. Chang affiliated with?
Dr. Chang practices at Providence Saint John's Health Center in Santa Monica, California.
What medical group is Dr. Tien-Yu Y. Chang part of?
Dr. Chang is linked to Bayside Anesthesia Medical Group. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Tien-Yu Y. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 171 services in 2024, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. Tien-Yu Y. Chang see?
CMS counts 299 Medicare patients who saw Dr. Chang in 2024, with an average age of 77.
Show 6 more questionsShow fewer questions
Is Dr. Tien-Yu Y. Chang board certified?
Yes. Dr. Chang is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. Tien-Yu Y. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were anesthesia (01402), anesthesia (01214) and surgery: brain, spine and nerves (64447).
Where did Dr. Tien-Yu Y. Chang go to medical school?
Dr. Chang graduated from Keck School of Medicine of USC in 2003.
Has Dr. Tien-Yu Y. Chang received payments from drug or device companies?
CMS Open Payments shows $2,652 in general payments to Dr. Chang from 15 companies from 2016 to 2024. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Tien-Yu Y. Chang been practicing?
Dr. Chang graduated from medical school in 2003, 23 years ago.
What insurance does Dr. Tien-Yu Y. Chang accept?
Dr. Chang is in network with 2 carriers, including CMS Medicare and NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
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