Dr. David S. Chang, DO
- Medicare services, 2016
- 2,847
- Part D claims, 2024
- 9,006
- Industry payments
- $693
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, 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 a family medicine physician in Stockton, California
Dr. Chang practices at Permanente Medical Group Inc in Stockton, California.
Dr. Chang's NPI, 1437465424, was assigned on August 27, 2010. Dr. Chang graduated from Touro University Nevada in 2010. Dr. Chang holds Florida license UO2604.
- NPI
- 1437465424NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234367954
- NPI enumeration date
- August 27, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David S. Chang practices at Permanente Medical Group Inc in Stockton, California
Dr. Chang's primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David S. Chang is affiliated with 3 sites of care and 2 medical groups
Dr. Chang's primary practice is Permanente Medical Group Inc in Stockton, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Chang to 2 more 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. David S. 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 |
|---|---|
| Permanente Medical Group Inc | 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 15,680 family medicine physicians in California
Family medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chang is board certified in anesthesiology by the American Board of Anesthesiology. Dr. Chang is licensed in Florida.
Specialties and state licenses
- Family medicine, FloridaPrimary
Clinical focus
Dmand AI lists chronic diabetes among the conditions Dr. Chang treats.
Family medicine physicians near Dr. Chang
Counts of family 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. David S. Chang billed Medicare for 2,847 services in 2016
CMS data shows 2,847 Medicare services from Dr. Chang across 30 procedure codes in 2016. Medicare paid $67,093 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2016
- Lab and pathology1,458
- Office and hospital visits845
- Surgery399
- Tests and treatments86
- Other services59
Dr. Chang compared with the California median for family medicine physicians, 2016
- Dr. Chang
- California median
- Medicare services
- 2,847vs 24611.6 times
- Part D claims
- 8,437vs 83310.1 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2016
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 family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David S. Chang's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 54, with 50% women.
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 54
Patient panel by sex, all payers
- Women50%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. David S. Chang wrote 9,006 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 9,006 Medicare Part D claims for 1,153 patients. 91% of them were for generic drugs. CMS names the drug for 8,437 of them, across 137 drugs with 11 or more claims each, at $264,345 in total drug cost. In 2023, CMS named 7,579 claims across 127 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic8,189 claims91%
- Brand-name759 claims8%
- Other58 claims1%
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
- Opioids4%403 of 9,006 claims
- Antibiotics3%309 of 9,006 claims
- Antipsychotics, patients 65 and over0%12 of 9,006 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: 7,5792024: 8,43711%
Drugs named by CMS: 137 in 2024, 127 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. David S. 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. David S. Chang received $693 in industry payments from 2016 to 2018
CMS Open Payments shows 48 general payments to Dr. Chang from 6 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 72% of the total. Novo Nordisk Inc paid the most, $473.
General payments to Dr. Chang by program year, 2016 to 2018
General payments to Dr. Chang by kind, 2016 to 2018
- Food and beverage$50072%
- Education$19428%
Companies that paid Dr. Chang the most, 2016 to 2018
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 Touro University Nevada
Dr. Chang graduated from Touro University Nevada in 2010.
- Medical school
- Board certified in anesthesiology
- Board certified in 2016 - 2026
- Board certified in 2012 - 2014
- Board certified in 2013 - 2019
Source: Dmand AI Professional Profile Data
Dr. David S. Chang accepts plans from 3 insurance carriers
Dr. Chang is in network with 3 carriers, including Kaiser Permanente, United Healthcare and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Kaiser Permanente
- United Healthcare
- CMS Medicare
Plan types Dr. Chang accepts, by number of carriers
- HMO2
- Medicare2
- POS2
- EPO1
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 | 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 Data |
| 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) |
| 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 1437465424. It was assigned on August 27, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. David S. Chang?
Dr. David S. Chang is a family medicine physician in Stockton, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. David S. Chang practice?
Dr. Chang practices at 7373 West Ln, Stockton, CA 95210. Dr. Chang's primary practice is Permanente Medical Group Inc in Stockton, California. Dmand AI also links Dr. Chang to 2 group practices and clinics and 1 medical group.
What is Dr. David S. Chang's office phone number?
The practice phone on file for Dr. Chang is (209) 476-2000.
What is Dr. David S. Chang's medical license number?
Dr. Chang holds Florida license UO2604.
What medical group is Dr. David S. Chang part of?
Dr. Chang is linked to The Permanente Medical Group, Inc. 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 2,847 services in 2016, and Dr. Chang accepts Medicare assignment.
Does Dr. David S. Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
Is Dr. David S. Chang board certified?
Yes. Dr. Chang is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. David S. Chang bill to Medicare?
In 2016, Dr. Chang's most billed Medicare services were office visit, established patient (99213), surgery: heart and blood vessels (36415) and lab and pathology test (85025).
Show 5 more questionsShow fewer questions
Where did Dr. David S. Chang go to medical school?
Dr. Chang graduated from Touro University Nevada in 2010.
What drugs does Dr. David S. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
Has Dr. David S. Chang received payments from drug or device companies?
CMS Open Payments shows $693 in general payments to Dr. Chang from 6 companies from 2016 to 2018. The largest total came from Novo Nordisk Inc.
How long has Dr. David S. Chang been practicing?
Dr. Chang graduated from medical school in 2010, 16 years ago.
What insurance does Dr. David S. Chang accept?
Dr. Chang is in network with 3 carriers, including Kaiser Permanente, United Healthcare and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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