Dr. Lynn K. Chang, MD
- Part D claims, 2024
- 124
- Publications
- 5
- Industry payments
- $1,186
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 1190 Veterans Blvd, Redwood City, CA 94063
- Practice phone
- Call (650) 299-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Redwood City, 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. Lynn K. Chang is a general surgeon in Redwood City, California
Dr. Chang practices at Permanente Medical Group Inc in Redwood City, California.
Dr. Chang's NPI, 1598843187, was assigned on November 1, 2006. Dr. Chang graduated from Keck School of Medicine of USC in 1995. Dr. Chang holds California license A62936.
- NPI
- 1598843187NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Practice phone
- (650) 299-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Lynn K. Chang practices at Permanente Medical Group Inc in Redwood City, California
Dr. Chang's primary practice is Permanente Medical Group Inc, at 1190 Veterans Blvd, Redwood City, CA 94063 in San Mateo County. The practice phone is (650) 299-2000.
- Permanente Medical Group Inc1190 Veterans Blvd, Redwood City, CA 94063 · San Mateo CountyPhone(650) 299-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Lynn K. Chang is affiliated with 2 sites of care and 1 medical group
Dr. Chang's primary practice is Permanente Medical Group Inc in Redwood City, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Chang to 1 more group practice or clinic, 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. Lynn K. 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 |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lynn K. Chang is one of 2,926 general surgeons in California
Surgery is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chang is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Massachusetts.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Massachusetts license
General surgeons near Dr. Chang
Counts of general 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. Lynn K. Chang's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 63, with 53% 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 63
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Lynn K. Chang wrote 124 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 124 Medicare Part D claims for 55 patients. 98% of them were for generic drugs. CMS names the drug for 86 of them, across 3 drugs with 11 or more claims each, at $701 in total drug cost. In 2023, CMS named 49 claims across 2 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic122 claims98%
- Brand-name and other2 claims2%
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
- Opioids36%45 of 124 claims
- Antibiotics9%11 of 124 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: 492024: 8676%
Drugs named by CMS: 3 in 2024, 2 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
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Dr. Lynn K. Chang has 5 publications on record
Dmand AI links 5 papers to Dr. Chang, published from 2004 to 2022. The most frequent topics are Cell Movement. Dr. Chang's most frequent co-authors are Nicholas A. Braus, MD, Emy J. Chen, MD and Cherina Marie Cyborski, MD.
Dr. Chang's papers by year, 2004 to 2022
Topics Dr. Chang writes about most
- Cell Movement
Dr. Chang's most frequent co-authors
- Nicholas A. Braus, MD1 shared paper
- Emy J. Chen, MD1 shared paper
- Cherina Marie Cyborski, MD1 shared paper
Recent publications by Dr. Chang
Scand J Immunol
Proc Natl Acad Sci U S A
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 general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Lynn K. Chang received $1,186 in industry payments from 2017 to 2023
CMS Open Payments shows 12 general payments to Dr. Chang from 6 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $709.
General payments to Dr. Chang by program year, 2017 to 2023
Companies that paid Dr. Chang the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Lynn K. Chang has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chang, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chang
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Lynn K. Chang graduated from Keck School of Medicine of USC
Dr. Chang graduated from Keck School of Medicine of USC in 1995. Dr. Chang is a member of ACS and CMDA.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Lynn K. Chang accepts plans from 2 insurance carriers
Dr. Chang is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chang accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Lynn K. 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 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Lynn K. 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. Lynn K. Chang's NPI number?
Dr. Lynn K. Chang's NPI number is 1598843187. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Lynn K. Chang?
Dr. Lynn K. Chang is a general surgeon in Redwood City, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Lynn K. Chang practice?
Dr. Chang practices at 1190 Veterans Blvd, Redwood City, CA 94063. Dr. Chang's primary practice is Permanente Medical Group Inc in Redwood City, California. Dmand AI also links Dr. Chang to 1 group practice or clinic.
What is Dr. Lynn K. Chang's office phone number?
The practice phone on file for Dr. Chang is (650) 299-2000.
What is Dr. Lynn K. Chang's medical license number?
Dr. Chang holds California license A62936, one of the licenses on file in 2 states.
Which states has Dr. Lynn K. Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California (1997 to 2027) and Massachusetts (1998 to 2005).
What medical group is Dr. Lynn K. Chang part of?
Dr. Chang is linked to The Permanente Medical Group, Inc.
Is Dr. Lynn K. Chang board certified?
Yes. Dr. Chang is board certified in surgery by the American Board of Surgery.
Where did Dr. Lynn K. Chang go to medical school?
Dr. Chang graduated from Keck School of Medicine of USC in 1995.
What drugs does Dr. Lynn K. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Ibuprofen, Hydrocodone-Acetaminophen and Oxycodone HCl.
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Has Dr. Lynn K. Chang received payments from drug or device companies?
CMS Open Payments shows $1,186 in general payments to Dr. Chang from 6 companies from 2017 to 2023. The largest total came from Allergan Inc.
How long has Dr. Lynn K. Chang been practicing?
Dr. Chang graduated from medical school in 1995, 31 years ago.
Does Dr. Lynn K. Chang do research?
Dmand AI links 5 publications to Dr. Chang, published from 2004 to 2022.
Who does Dr. Lynn K. Chang publish with?
Dr. Chang's most frequent co-authors are Nicholas A. Braus, MD (1 shared paper), Emy J. Chen, MD (1 shared paper) and Cherina Marie Cyborski, MD (1 shared paper).
What insurance does Dr. Lynn K. Chang accept?
Dr. Chang is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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