Ann Vasc Surg
Arteriovenous Shunt, SurgicalBlood Vessel ProsthesisBlood Vessel Prosthesis Implantation
Dr. Diane Kwan, MD
NPI1992913859PAC ID9032379227
- Medicare services, 2024
- 267
- Medicare patients, 2024
- 194
- Part D claims, 2024
- 93
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 2540 East St, Concord, CA 94520
- Practice phone
- Call (925) 682-8200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kwan'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. Diane Kwan is a general surgeon in Concord, California
Dr. Kwan practices at Concord Medical Center in Concord, California, part of John Muir Health.
Dr. Kwan's NPI, 1992913859, was assigned on May 21, 2007. Dr. Kwan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 2006. Dr. Kwan holds California license A117525.
NPI and contact details
- NPI
- 1992913859NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032379227
- NPI enumeration date
- May 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (925) 682-8200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Diane Kwan practices at Concord Medical Center in Concord, California
Dr. Kwan's primary practice is Concord Medical Center, at 2540 East St, Concord, CA 94520 in Contra Costa County. The practice phone is (925) 682-8200.
- Concord Medical Center2540 East St, Concord, CA 94520 · Contra Costa CountyPhone(925) 682-8200
Source: Dmand AI Affiliation Data
Dr. Diane Kwan is affiliated with 3 sites of care and 1 medical group
Dr. Kwan's primary practice is Concord Medical Center in Concord, California, part of John Muir Health. Dr. Kwan is also affiliated with John Muir Medical Center, Walnut Creek. The medical group on file is Epic Care. Dmand AI also links Dr. Kwan to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Diane Kwan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kwan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Concord Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Diane Kwan is one of 2,926 general surgeons in California
Surgery is Dr. Kwan's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Kwan is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Kwan's licenses on file in 2 states: California and Louisiana.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Louisiana license
Clinical focus
Dmand AI lists appendectomy, bariatric surgery, colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal and groin hernia surgery among the conditions Dr. Kwan treats.
General surgeons near Dr. Kwan
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,926general surgeons in California10general surgeons in Concord10general surgeons at Concord Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Diane Kwan billed Medicare for 267 services in 2024
CMS data shows 267 Medicare services from Dr. Kwan across 6 procedure codes in 2024, for 194 Medicare patients. Medicare paid $45,884 for them.
Medicare services, 2024267
Medicare patients194
Paid by Medicare$45,884
Procedure codes6
Dr. Kwan's Medicare services by type, 2024
- Office and hospital visits237
- Surgery30
Where Dr. Kwan's Medicare services took place, 2024
- In an office19975%
- In a facility6825%
Dr. Kwan compared with the California median for general surgeons, 2024
- Dr. Kwan
- California median
- Medicare services
- 267vs 16661% above
- Medicare patients
- 194vs 12160% above
- Part D claims
- 66vs 3494% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Kwan'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. Kwan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kwan and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Diane Kwan treated 194 Medicare patients in 2024, average age 70
CMS counts 194 Medicare patients who saw Dr. Kwan in 2024. The largest group is 65 to 74, with 82 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 35% are also on Medicaid. Their average risk score is 1.51, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kwan's median patient age at 55, with 66% women.
Medicare patients, 2024194
Average age70
Average risk score1.51
Also on Medicaid35%
Dr. Kwan's Medicare patients by age, 2024
Dr. Kwan's Medicare patients by sex, 2024
- Women11861%
- Men7639%
Chronic conditions among Dr. Kwan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis43%
- Diabetes32%
- Anxiety28%
- Chronic kidney disease26%
- Mood disorders26%
- Depression23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kwan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Diane Kwan wrote 93 Medicare Part D claims in 2024
In 2024, Dr. Kwan wrote 93 Medicare Part D claims for 36 patients. 100% of them were for generic drugs. CMS names the drug for 66 of them, across 3 drugs with 11 or more claims each, at $674 in total drug cost.
Part D claims, 202493
Drugs named by CMS3
Total drug cost$674
Part D patients36
Dr. Kwan'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. Kwan's Part D claims, 2024
- Opioids16%15 of 93 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Diane Kwan ranks in the 89th percentile for hernia repair (minimally invasive) in Medicare
Dr. Kwan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kwan as offering telehealth. CMS counts 21 procedures of hernia repair (minimally invasive) by Dr. Kwan, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Kwan ranks in Medicare procedure volume
- Hernia repair (minimally invasive)
- 89th percentile21 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Diane Kwan has 1 publication on record
Dmand AI links 1 paper to Dr. Kwan in 2007. Dr. Kwan's most frequent co-authors are Lea Moreen Blackwell, MD, Azeem R. Khan, MD and Paul E. Perkowski, MD.
Papers1
Dr. Kwan's most frequent co-authors
- Lea Moreen Blackwell, MD1 shared paper
- Azeem R. Khan, MD1 shared paper
- Paul E. Perkowski, MD1 shared paper
Recent publications by Dr. Kwan
See who Dr. Kwan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kwan 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. Diane Kwan received $45,756 in industry payments from 2024 to 2025
CMS Open Payments shows 42 general payments to Dr. Kwan from 8 drug and device companies from 2024 to 2025. Education make up the largest share, 56% of the total. Intuitive Surgical, Inc. paid the most, $26,411.
General payments to Dr. Kwan by program year, 2024 to 2025
General payments to Dr. Kwan by kind, 2024 to 2025
$45.8Kin total
- Education$25,75056%
- Consulting fees$18,32740%
- Food and beverage$1,5123%
- Travel and lodging$1680%
Companies that paid Dr. Kwan the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Diane Kwan has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Kwan, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Kwan
- 2013
- CMS Stage 1 EHR
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Diane Kwan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Kwan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 2006. Dr. Kwan is a member of ACS, ASMBS and SLS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Diane Kwan accepts plans from 15 insurance carriers
Dr. Kwan is in network with 15 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
- Regence Health Plans
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. Kwan accepts, by number of carriers
- Medicare9
- PPO9
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Diane Kwan'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 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)Doctors and Clinicians Utilization Data (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. Diane Kwan
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. Diane Kwan's NPI number?
Dr. Diane Kwan's NPI number is 1992913859. It was assigned on May 21, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Diane Kwan?
Dr. Diane Kwan is a general surgeon in Concord, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Diane Kwan practice?
Dr. Kwan practices at 2540 East St, Concord, CA 94520. Dr. Kwan's primary practice is Concord Medical Center in Concord, California, part of John Muir Health. Dmand AI also links Dr. Kwan to 1 group practice or clinic.
What is Dr. Diane Kwan's office phone number?
The practice phone on file for Dr. Kwan is (925) 682-8200.
What is Dr. Diane Kwan's medical license number?
Dr. Kwan holds California license A117525, one of the licenses on file in 2 states.
Which states has Dr. Diane Kwan been licensed in?
Dmand AI has state licenses on file for Dr. Kwan in California (2011 to 2026) and Louisiana (2008 to 2012).
Which hospitals is Dr. Diane Kwan affiliated with?
Dr. Kwan practices at Concord Medical Center in Concord, California. Dr. Kwan is also affiliated with John Muir Medical Center, Walnut Creek.
What medical group is Dr. Diane Kwan part of?
Dr. Kwan is linked to Epic Care.
Does Dr. Diane Kwan accept Medicare?
Yes. CMS data shows Dr. Kwan billed Medicare for 267 services in 2024, and Dr. Kwan accepts Medicare assignment.
Does Dr. Diane Kwan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kwan as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Diane Kwan see?
CMS counts 194 Medicare patients who saw Dr. Kwan in 2024, with an average age of 70.
Is Dr. Diane Kwan board certified?
Yes. Dr. Kwan is board certified in surgery by the American Board of Surgery.
What services does Dr. Diane Kwan bill to Medicare?
In 2024, Dr. Kwan's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99214) and hospital inpatient care (99233).
Where did Dr. Diane Kwan go to medical school?
Dr. Kwan graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 2006.
What drugs does Dr. Diane Kwan prescribe most?
In 2024 Medicare Part D data, Dr. Kwan's most prescribed drugs by claims were Pantoprazole Sodium, Ondansetron ODT and Oxycodone HCl.
Has Dr. Diane Kwan received payments from drug or device companies?
CMS Open Payments shows $45,756 in general payments to Dr. Kwan from 8 companies from 2024 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Diane Kwan been practicing?
Dr. Kwan graduated from medical school in 2006, 20 years ago.
Does Dr. Diane Kwan do research?
Dmand AI links 1 publication to Dr. Kwan.
Who does Dr. Diane Kwan publish with?
Dr. Kwan's most frequent co-authors are Lea Moreen Blackwell, MD (1 shared paper), Azeem R. Khan, MD (1 shared paper) and Paul E. Perkowski, MD (1 shared paper).
What insurance does Dr. Diane Kwan accept?
Dr. Kwan is in network with 15 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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