Dr. Christine M. Chang, MD
- Medicare services, 2024
- 2,589
- Medicare patients, 2024
- 277
- Part D claims, 2024
- 2,570
- Publications
- 2
- Hospital affiliations
- 3
- Practice address
- 4165 Blackhawk Plaza Cir, Danville, CA 94506
- Practice phone
- Call (925) 296-9872
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
John Muir Physician Network
Danville, 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. Christine M. Chang is an internist in Danville, California
Dr. Chang practices at John Muir Physician Network in Danville, California.
Dr. Chang's NPI, 1770696056, was assigned on August 17, 2006. Dr. Chang graduated from Albert Einstein College of Medicine in 1992. Dr. Chang holds California license G77503.
- NPI
- 1770696056NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7012079593
- NPI enumeration date
- August 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (925) 296-9872
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christine M. Chang practices at John Muir Physician Network in Danville, California
Dr. Chang's primary practice is John Muir Physician Network, at 4165 Blackhawk Plaza Cir, Danville, CA 94506 in Contra Costa County. The practice phone is (925) 296-9872.
- John Muir Physician Network4165 Blackhawk Plaza Cir, Danville, CA 94506 · Contra Costa CountyPhone(925) 296-9872
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Christine M. Chang is affiliated with 6 sites of care and 2 medical groups
Dr. Chang's primary practice is John Muir Physician Network in Danville, California. Dr. Chang is also affiliated with John Muir Medical Center, Walnut Creek. The medical group on file is John Muir Medical Group. Dmand AI also links Dr. Chang to 2 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Christine M. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Physician Network | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christine M. Chang is one of 16,751 internists in California
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chang is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, acute skin infection, alzheimer's disease, arthritis, asthma, atrial fibrillation and flutter, bronchitis and bursitis among the conditions Dr. Chang treats.
Internists near Dr. Chang
Counts of internists 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. Christine M. Chang billed Medicare for 2,589 services in 2024
CMS data shows 2,589 Medicare services from Dr. Chang across 15 procedure codes in 2024, for 277 Medicare patients. Medicare paid $73,566 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1,8002024: 1,800No change
- Office and hospital visits
- 2023: 3642024: 41313%
- Other services
- 2023: 1902024: 22921%
- Tests and treatments
- 2023: 1062024: 13225%
- Lab and pathology
- 2023: 02024: 15
Dr. Chang compared with the California median for internists, 2024
- Dr. Chang
- California median
- Medicare services
- 2,589vs 3617.2 times
- Medicare patients
- 277vs 15183% above
- Part D claims
- 2,041vs 4214.8 times
Medians across 15,815 internists 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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christine M. Chang treated 277 Medicare patients in 2024, average age 75
CMS counts 277 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 144 patients. 75% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 0.70, 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 68% 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
- Women19871%
- Men7929%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure62%
- Arthritis39%
- Osteoporosis20%
- Atrial fibrillation13%
- Cancer12%
- Chronic kidney disease12%
- Ischemic heart disease12%
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
- Women68%
- Men30%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Christine M. Chang wrote 2,570 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 2,570 Medicare Part D claims for 332 patients. 93% of them were for generic drugs. CMS names the drug for 2,041 of them, across 48 drugs with 11 or more claims each, at $70,811 in total drug cost. In 2023, CMS named 2,074 claims across 47 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic2,384 claims93%
- Brand-name and other186 claims7%
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
- Opioids0%12 of 2,570 claims
- Antibiotics4%99 of 2,570 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: 2,0742024: 2,0412%
Drugs named by CMS: 48 in 2024, 47 in 2023.
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. Christine M. 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. Christine M. Chang has 2 publications on record
Dmand AI links 2 papers to Dr. Chang in 2016. Dr. Chang's most frequent co-authors are Mindie Hoai Nguyen, MD, Ailinh L. Do, MD and Oliver Nicholas Lin, MD.
Dr. Chang's most frequent co-authors
- Mindie Hoai Nguyen, MD2 shared papers
- Ailinh L. Do, MD1 shared paper
- Oliver Nicholas Lin, MD1 shared paper
Recent publications by Dr. Chang
J Immigr Minor Health
See who Dr. Chang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chang works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Christine M. Chang received $5,653 in industry payments from 2016 to 2025
CMS Open Payments shows 246 general payments to Dr. Chang from 37 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $1,088.
General payments to Dr. Chang by program year, 2016 to 2025
Companies that paid Dr. Chang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christine M. Chang graduated from Albert Einstein College of Medicine
Dr. Chang graduated from Albert Einstein College of Medicine in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Christine M. Chang accepts plans from 14 insurance carriers
Dr. Chang is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- Medicare9
- PPO9
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Christine M. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Medicare Part D Prescribers - 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Christine M. 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. Christine M. Chang's NPI number?
Dr. Christine M. Chang's NPI number is 1770696056. It was assigned on August 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Christine M. Chang?
Dr. Christine M. Chang is an internist in Danville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Christine M. Chang practice?
Dr. Chang practices at 4165 Blackhawk Plaza Cir, Danville, CA 94506. Dr. Chang's primary practice is John Muir Physician Network in Danville, California. Dmand AI also links Dr. Chang to 2 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Christine M. Chang's office phone number?
The practice phone on file for Dr. Chang is (925) 296-9872.
What is Dr. Christine M. Chang's medical license number?
Dr. Chang holds California license G77503.
Which hospitals is Dr. Christine M. Chang affiliated with?
Dr. Chang is affiliated with John Muir Medical Center, Walnut Creek. Dmand AI links Dr. Chang to 2 more hospitals.
What medical group is Dr. Christine M. Chang part of?
Dr. Chang is linked to John Muir Medical Group. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Christine M. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 2,589 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Christine M. Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
How many Medicare patients does Dr. Christine M. Chang see?
CMS counts 277 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
Show 8 more questionsShow fewer questions
What services does Dr. Christine M. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Christine M. Chang go to medical school?
Dr. Chang graduated from Albert Einstein College of Medicine in 1992.
What drugs does Dr. Christine M. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Christine M. Chang received payments from drug or device companies?
CMS Open Payments shows $5,653 in general payments to Dr. Chang from 37 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Christine M. Chang been practicing?
Dr. Chang graduated from medical school in 1992, 34 years ago.
Does Dr. Christine M. Chang do research?
Dmand AI links 2 publications to Dr. Chang.
Who does Dr. Christine M. Chang publish with?
Dr. Chang's most frequent co-authors are Mindie Hoai Nguyen, MD (2 shared papers), Ailinh L. Do, MD (1 shared paper) and Oliver Nicholas Lin, MD (1 shared paper).
What insurance does Dr. Christine M. Chang accept?
Dr. Chang is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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