Dr. Alec Chang, DO
- Part D claims, 2024
- 64
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $553
- Medical groups
- 2
- Practice address
- 250 Bon Air Road, Greenbrae, CA 94904
- Practice phone
- Call (415) 925-7900
- 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. Alec Chang is a psychiatrist in Greenbrae, California
Dr. Chang practices at MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District.
Dr. Chang's NPI, 1013259415, was assigned on March 23, 2013. Dr. Chang graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013. Dr. Chang holds California license 20A14880.
- NPI
- 1013259415NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749596997
- NPI enumeration date
- March 23, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 925-7900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alec Chang practices at MarinHealth Medical Center in Greenbrae, California
Dr. Chang's primary practice is MarinHealth Medical Center, at 250 Bon Air Road, Greenbrae, CA 94904 in Marin County. The practice phone is (415) 925-7900.
- MarinHealth Medical Center250 Bon Air Road, Greenbrae, CA 94904 · Marin CountyPhone(415) 925-7900
Source: Dmand AI Affiliation Data
Dr. Alec Chang is affiliated with 1 site of care and 2 medical groups
Dr. Chang's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District. The medical group on file is Marin County Behavioral Health and Recovery Services (BHRS). 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. Alec 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 |
|---|---|
| MarinHealth Medical 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. Alec Chang is one of 6,803 psychiatrists in California
Psychiatry is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Chang is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dr. Chang is licensed in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Psychiatrists near Dr. Chang
Counts of psychiatrists 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. Alec Chang's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 37, with 39% 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 37
Patient panel by sex, all payers
- Women39%
- Men61%
Source: Dmand AI Patient Panel Data
Dr. Alec Chang wrote 64 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 64 Medicare Part D claims for 16 patients. 89% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $141 in total drug cost. In 2016, CMS named 308 claims across 17 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic57 claims89%
- Brand-name and other7 claims11%
Dr. Chang's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2021
- 2016
- 2021
- Claims for drugs CMS names
- 2016: 3082021: 1296%
Drugs named by CMS: 1 in 2021, 17 in 2016.
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
How Dr. Alec 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. Alec Chang has 1 publication on record
Dmand AI links 1 paper to Dr. Chang.
Recent publications by Dr. Chang
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 psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alec Chang received $553 in industry payments from 2016 to 2023
CMS Open Payments shows 13 general payments to Dr. Chang from 5 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Neurocrine BioSciences, Inc. paid the most, $143.
General payments to Dr. Chang by program year, 2016 to 2023
Companies that paid Dr. Chang the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alec Chang graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Chang graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Alec Chang accepts plans from 4 insurance carriers
Dr. Chang is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Massachusetts
- HCSC
- NV State Medicaid
Plan types Dr. Chang accepts, by number of carriers
- PPO3
- Medicare2
- EPO1
- HMO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Alec 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 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) |
| 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. Alec 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. Alec Chang's NPI number?
Dr. Alec Chang's NPI number is 1013259415. It was assigned on March 23, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Alec Chang?
Dr. Alec Chang is a psychiatrist in Greenbrae, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Alec Chang practice?
Dr. Chang practices at 250 Bon Air Road, Greenbrae, CA 94904. Dr. Chang's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District. Dmand AI also links Dr. Chang to 1 medical group.
What is Dr. Alec Chang's office phone number?
The practice phone on file for Dr. Chang is (415) 925-7900.
What is Dr. Alec Chang's medical license number?
Dr. Chang holds California license 20A14880.
Which hospitals is Dr. Alec Chang affiliated with?
Dr. Chang practices at MarinHealth Medical Center in Greenbrae, California.
What medical group is Dr. Alec Chang part of?
Dr. Chang is linked to Marin County Behavioral Health and Recovery Services (BHRS). Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Alec Chang accept Medicare?
Yes. CMS lists Dr. Chang as accepting Medicare assignment.
Is Dr. Alec Chang board certified?
Yes. Dr. Chang is board certified in psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Alec Chang go to medical school?
Dr. Chang graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013.
Show 5 more questionsShow fewer questions
What drugs does Dr. Alec Chang prescribe most?
In 2021 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Quetiapine Fumarate.
Has Dr. Alec Chang received payments from drug or device companies?
CMS Open Payments shows $553 in general payments to Dr. Chang from 5 companies from 2016 to 2023. The largest total came from Neurocrine BioSciences, Inc.
How long has Dr. Alec Chang been practicing?
Dr. Chang graduated from medical school in 2013, 13 years ago.
Does Dr. Alec Chang do research?
Dmand AI links 1 publication to Dr. Chang.
What insurance does Dr. Alec Chang accept?
Dr. Chang is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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