Dr. Steven Christopher Chang, MD
- Medicare services, 2024
- 74
- Medicare patients, 2024
- 108
- Hospital affiliations
- 2
- Industry payments
- $339
- Medical group
- 1
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- 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
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Steven Christopher Chang is an anesthesiologist in Walnut Creek, California
Dr. Chang practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Chang's NPI, 1427090414, was assigned on June 12, 2006. Dr. Chang graduated from Duke University School Of Medicine in 1989. Dr. Chang holds California license G70914.
- NPI
- 1427090414NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789667478
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven Christopher Chang practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Chang's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Dr. Steven Christopher Chang is affiliated with 2 sites of care and 1 medical group
Dr. Chang's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. The medical group on file is G2 Anesthesia. Dmand AI also links Dr. Chang to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Steven Christopher Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Steven Christopher 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 Colorado.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
- Colorado 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. Steven Christopher Chang billed Medicare for 74 services in 2024
CMS data shows 74 Medicare services from Dr. Chang across 4 procedure codes in 2024, for 108 Medicare patients. Medicare paid $8,917 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: 1892024: 7461%
Dr. Chang compared with the California median for anesthesiologists, 2024
- Dr. Chang
- California median
- Medicare services
- 74vs 72Close to median
- Medicare patients
- 108vs 14324% below
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.
Need commercial claims for Dr. Chang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steven Christopher Chang treated 108 Medicare patients in 2024, average age 75
CMS counts 108 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 55 patients. 75% of them have high cholesterol, and 68% have high blood pressure. 10% are also on Medicaid. Their average risk score is 0.93, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 59, with 33% 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
- Women5854%
- Men5046%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure68%
- Arthritis35%
- Cancer28%
- Ischemic heart disease24%
- Diabetes22%
- Chronic kidney disease18%
- Osteoporosis18%
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 59
Patient panel by sex, all payers
- Women33%
- Men67%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Steven Christopher 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. Steven Christopher Chang received $339 in industry payments from 2016 to 2021
CMS Open Payments shows 6 general payments to Dr. Chang from 5 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Mallinckrodt Hospital Products Inc. paid the most, $145.
General payments to Dr. Chang by program year, 2016 to 2021
Companies that paid Dr. Chang the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Steven Christopher Chang graduated from Duke University School Of Medicine
Dr. Chang graduated from Duke University School Of Medicine in 1989.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Steven Christopher Chang accepts plans from 1 insurance carrier
Dr. Chang is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Steven Christopher 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. Steven Christopher 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. Steven Christopher Chang's NPI number?
Dr. Steven Christopher Chang's NPI number is 1427090414. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven Christopher Chang?
Dr. Steven Christopher Chang is an anesthesiologist in Walnut Creek, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Steven Christopher Chang practice?
Dr. Chang practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Chang's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Chang to 1 hospital.
What is Dr. Steven Christopher Chang's office phone number?
The practice phone on file for Dr. Chang is (925) 939-3000.
What is Dr. Steven Christopher Chang's medical license number?
Dr. Chang holds California license G70914, one of the licenses on file in 2 states.
Which states has Dr. Steven Christopher Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California (1991 to 2026) and Colorado (1994 to 1997).
Which hospitals is Dr. Steven Christopher Chang affiliated with?
Dr. Chang practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dmand AI links Dr. Chang to 1 more hospital.
What medical group is Dr. Steven Christopher Chang part of?
Dr. Chang is linked to G2 Anesthesia.
Does Dr. Steven Christopher Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 74 services in 2024, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. Steven Christopher Chang see?
CMS counts 108 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
Show 6 more questionsShow fewer questions
Is Dr. Steven Christopher Chang board certified?
Yes. Dr. Chang is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. Steven Christopher Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were anesthesia (00142), anesthesia (00811) and anesthesia (00731).
Where did Dr. Steven Christopher Chang go to medical school?
Dr. Chang graduated from Duke University School Of Medicine in 1989.
Has Dr. Steven Christopher Chang received payments from drug or device companies?
CMS Open Payments shows $339 in general payments to Dr. Chang from 5 companies from 2016 to 2021. The largest total came from Mallinckrodt Hospital Products Inc.
How long has Dr. Steven Christopher Chang been practicing?
Dr. Chang graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Steven Christopher Chang accept?
Dr. Chang is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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