Dr. David S. Chang, MD
- Medicare services, 2024
- 26
- Medicare patients, 2024
- 30
- Part D claims, 2016
- 66
- Hospital affiliations
- 1
- Industry payments
- $2,173
- Practice address
- 5700 Telegraph Avenue, Oakland, CA 94609
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD
Acute Care Hospital outpatient department · Oakland, California
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. David S. Chang is an orthopedic surgeon in Oakland, California
Dr. Chang practices at Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD in Oakland, California.
Dr. Chang's NPI, 1316918881, was assigned on January 31, 2006. Dr. Chang graduated from Wake Forest School of Medicine in 1999. Dr. Chang's California license number on file is A87115.
- NPI
- 1316918881NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921064213
- NPI enumeration date
- January 31, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. David S. Chang practices at Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD in Oakland, California
Dr. Chang's primary practice is Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD, at 5700 Telegraph Avenue, Oakland, CA 94609.
- Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD5700 Telegraph Avenue, Oakland, CA 94609
Source: Dmand AI Affiliation Data
Dr. David S. Chang is affiliated with 3 sites of care and 2 medical groups
Dr. Chang's primary practice is Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD in Oakland, California. Dr. Chang is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. The medical group on file is Alameda Health System. Dmand AI also links Dr. Chang to 1 more group practice or clinic and 1 medical group, each named with a free account. Dr. Chang's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. David S. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David S. Chang is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Chang is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dr. Chang has a license on file in California.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists arthritis, bursitis, fluid in a joint, knee arthroscopy, knee injury, lower back pain, minor injury to a limb and rotator cuff injury among the conditions Dr. Chang treats.
Orthopedic surgeons near Dr. Chang
Counts of orthopedic surgeons 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. David S. Chang billed Medicare for 26 services in 2024
CMS data shows 26 Medicare services from Dr. Chang across 1 procedure code in 2024, all of them office visits, for 30 Medicare patients. Medicare paid $1,816 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 352024: 2626%
Dr. Chang compared with the California median for orthopedic surgeons, 2024
- Dr. Chang
- California median
- Medicare services
- 26vs 68396% below
- Medicare patients
- 30vs 21586% below
- Part D claims
- 66vs 706% below
Medians across 1,844 orthopedic surgeons 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David S. Chang treated 30 Medicare patients in 2024, average age 75
CMS counts 30 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 16 patients. 73% of them have high cholesterol, and 50% have high blood pressure. Their average risk score is 0.71, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 65, with 53% 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
- Women1860%
- Men1240%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol73%
- High blood pressure50%
- Arthritis47%
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 65
Patient panel by sex, all payers
- Women53%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David S. Chang wrote 66 Medicare Part D claims in 2016
In 2016, Dr. Chang wrote 66 Medicare Part D claims. They cover 4 drugs, with $4,037 in total drug cost.
Dr. Chang's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. David S. Chang takes part in Medicare
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Source: Doctors and Clinicians Utilization Data (CMS)
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Dr. David S. Chang received $2,173 in industry payments from 2016 to 2024
CMS Open Payments shows 14 general payments to Dr. Chang from 10 drug and device companies from 2016 to 2024. Education make up the largest share, 55% of the total. Evolution Surgical, Inc paid the most, $1,329.
General payments to Dr. Chang by program year, 2016 to 2024
General payments to Dr. Chang by kind, 2016 to 2024
- Education$1,20055%
- Food and beverage$97345%
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. David S. Chang graduated from Wake Forest School of Medicine
Dr. Chang graduated from Wake Forest School of Medicine in 1999.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. David S. Chang accepts plans from 10 insurance carriers
Dr. Chang is in network with 10 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- +2 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- Medicare7
- PPO7
- POS4
- HMO3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. David S. 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 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians Utilization Data (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. David S. 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. David S. Chang's NPI number?
Dr. David S. Chang's NPI number is 1316918881. It was assigned on January 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David S. Chang?
Dr. David S. Chang is an orthopedic surgeon in Oakland, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. David S. Chang practice?
Dr. Chang practices at 5700 Telegraph Avenue, Oakland, CA 94609. Dr. Chang's primary practice is Alta Bates Summit Outpatient Physical, Sports and Hand Therapy - HOPD in Oakland, California. Dmand AI also links Dr. Chang to 1 group practice or clinic and 1 medical group.
What is Dr. David S. Chang's medical license number?
Dr. Chang's California license number on file is A87115.
Which hospitals is Dr. David S. Chang affiliated with?
Dr. Chang is affiliated with Alta Bates Summit Medical Center | Alta Bates Campus.
What medical group is Dr. David S. Chang part of?
Dr. Chang is linked to Alameda Health System. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. David S. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 26 services in 2024.
How many Medicare patients does Dr. David S. Chang see?
CMS counts 30 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
Is Dr. David S. Chang board certified?
Yes. Dr. Chang is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
What services does Dr. David S. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were office visit, established patient (99213).
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Where did Dr. David S. Chang go to medical school?
Dr. Chang graduated from Wake Forest School of Medicine in 1999.
What drugs does Dr. David S. Chang prescribe most?
In 2016 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Voltaren, Diclofenac Sodium and Hydrocodone-Acetaminophen.
Has Dr. David S. Chang received payments from drug or device companies?
CMS Open Payments shows $2,173 in general payments to Dr. Chang from 10 companies from 2016 to 2024. The largest total came from Evolution Surgical, Inc.
How long has Dr. David S. Chang been practicing?
Dr. Chang graduated from medical school in 1999, 27 years ago.
What insurance does Dr. David S. Chang accept?
Dr. Chang is in network with 10 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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