Dr. Chiwai E. Chan, DO
- Medicare services, 2024
- 165,360
- Medicare patients, 2024
- 651
- Part D claims, 2024
- 716
- Hospital affiliations
- 2
- Industry payments
- $4,768
- Practice address
- 11160 Warner Ave, Fountain Valley, CA 92708
- Practice phone
- Call (714) 444-4495
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dr. K Plastic Surgery
Fountain Valley, California
Find Dr. Chan'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. Chiwai E. Chan is an interventional pain medicine physician in Fountain Valley, California
Dr. Chan practices at Dr. K Plastic Surgery in Fountain Valley, California.
Dr. Chan's NPI, 1629051529, was assigned on November 23, 2005. Dr. Chan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2000. Dr. Chan holds California license 20A8068.
- NPI
- 1629051529NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981630811
- NPI enumeration date
- November 23, 2005
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (714) 444-4495
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Chiwai E. Chan practices at Dr. K Plastic Surgery in Fountain Valley, California
Dr. Chan's primary practice is Dr. K Plastic Surgery, at 11160 Warner Ave, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 444-4495.
- Dr. K Plastic Surgery11160 Warner Ave, Fountain Valley, CA 92708 · Orange CountyPhone(714) 444-4495
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Chiwai E. Chan is affiliated with 4 sites of care
Dr. Chan's primary practice is Dr. K Plastic Surgery in Fountain Valley, California. Dr. Chan is also affiliated with Orange Coast Medical Center. Dmand AI also links Dr. Chan to 1 more hospital and 1 physician office, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Chiwai E. Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. K Plastic Surgery | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Chiwai E. Chan is one of 215 interventional pain medicine physicians in California
Interventional pain medicine is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 208VP0014X. Dr. Chan is board certified in 2005 - 2008 by the AZ State License. Dmand AI has Dr. Chan's licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Interventional pain medicine, CaliforniaPrimary
- Pain medicine, Arizona
Clinical focus
Dmand AI lists back pain injection, drug use disorders, lower back pain, muscle pain, fibromyalgia, and limb pain, neck pain and spine problems, spinal stenosis and thoracic spine disorders among the conditions Dr. Chan treats.
Interventional pain medicine physicians near Dr. Chan
Counts of interventional pain 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. Chiwai E. Chan billed Medicare for 165,360 services in 2024
CMS data shows 165,360 Medicare services from Dr. Chan across 25 procedure codes in 2024, for 651 Medicare patients. Medicare paid $990,875 for them.
Dr. Chan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 4,6172024: 105,9642195%
- Other services
- 2023: 41,1602024: 50,59823%
- Office and hospital visits
- 2023: 5,6542024: 6,51815%
- Surgery
- 2023: 1,0122024: 1,17516%
- Imaging
- 2023: 6212024: 92148%
- Tests and treatments
- 2023: 1512024: 18422%
Where Dr. Chan's Medicare services took place, 2024
- In an office163,15999%
- In a facility2,2011%
Dr. Chan compared with the California median for interventional pain medicine physicians, 2024
- Dr. Chan
- California median
- Medicare services
- 165,360vs 1,232134.2 times
- Medicare patients
- 651vs 2083.1 times
- Part D claims
- 626vs 34880% above
Medians across 209 interventional pain medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Chan'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chan and other interventional pain medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Chiwai E. Chan treated 651 Medicare patients in 2024, average age 69
CMS counts 651 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 287 patients. 75% of them have arthritis, and 75% have high blood pressure. 85% are also on Medicaid. Their average risk score is 1.95, 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. Chan's median patient age at 61, with 58% women.
Dr. Chan's Medicare patients by age, 2024
Dr. Chan's Medicare patients by sex, 2024
- Women39861%
- Men25339%
Chronic conditions among Dr. Chan's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes49%
- Mood disorders42%
- Depression38%
- Anxiety34%
- Chronic kidney disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women58%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Chiwai E. Chan wrote 716 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 716 Medicare Part D claims for 262 patients. 94% of them were for generic drugs. CMS names the drug for 626 of them, across 17 drugs with 11 or more claims each, at $7,776 in total drug cost. In 2023, CMS named 883 claims across 18 drugs.
Dr. Chan's Part D claims by kind of drug, 2024
- Generic675 claims94%
- Brand-name41 claims6%
Dr. Chan'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. Chan's Part D claims, 2024
- Opioids67%482 of 716 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: 8832024: 62629%
Drugs named by CMS: 17 in 2024, 18 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. Chiwai E. Chan offers telehealth to Medicare patients
CMS lists Dr. Chan as offering telehealth.
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Chiwai E. Chan received $4,768 in industry payments from 2016 to 2025
CMS Open Payments shows 321 general payments to Dr. Chan from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Daiichi Sankyo Inc. paid the most, $974.
General payments to Dr. Chan by program year, 2016 to 2025
General payments to Dr. Chan by kind, 2016 to 2025
- Food and beverage$4,56296%
- Education$2064%
Companies that paid Dr. Chan 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. Chiwai E. Chan graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Chan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2000.
- Medical school
- Board certified in 2005 - 2008
- Board certified in 2002 - 2025
- Board certified in 2001 - 2003
Source: Dmand AI Professional Profile Data
Dr. Chiwai E. Chan accepts plans from 14 insurance carriers
Dr. Chan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Chan accepts, by number of carriers
- PPO8
- Medicare7
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Chiwai E. Chan'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 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) |
| 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. Chiwai E. Chan
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. Chiwai E. Chan's NPI number?
Dr. Chiwai E. Chan's NPI number is 1629051529. It was assigned on November 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Chiwai E. Chan?
Dr. Chiwai E. Chan is an interventional pain medicine physician in Fountain Valley, California. The primary specialty in the NPI Registry is Interventional Pain Medicine Physician (taxonomy code 208VP0014X).
Where does Dr. Chiwai E. Chan practice?
Dr. Chan practices at 11160 Warner Ave, Fountain Valley, CA 92708. Dr. Chan's primary practice is Dr. K Plastic Surgery in Fountain Valley, California. Dmand AI also links Dr. Chan to 1 hospital and 1 physician office.
What is Dr. Chiwai E. Chan's office phone number?
The practice phone on file for Dr. Chan is (714) 444-4495.
What is Dr. Chiwai E. Chan's medical license number?
Dr. Chan holds California license 20A8068, one of the licenses on file in 2 states.
Which states has Dr. Chiwai E. Chan been licensed in?
Dmand AI has state licenses on file for Dr. Chan in California and Arizona.
Which hospitals is Dr. Chiwai E. Chan affiliated with?
Dr. Chan is affiliated with Orange Coast Medical Center. Dmand AI links Dr. Chan to 1 more hospital.
Does Dr. Chiwai E. Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 165,360 services in 2024.
Does Dr. Chiwai E. Chan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chan as offering telehealth services.
How many Medicare patients does Dr. Chiwai E. Chan see?
CMS counts 651 Medicare patients who saw Dr. Chan in 2024, with an average age of 69.
Show 7 more questionsShow fewer questions
Is Dr. Chiwai E. Chan board certified?
Yes. Dr. Chan is board certified in 2005 - 2008 by the AZ State License.
What services does Dr. Chiwai E. Chan bill to Medicare?
In 2024, Dr. Chan's most billed Medicare services were injected or infused drug (J1010), medicare temporary code (Q9966) and office visit, established patient (99214).
Where did Dr. Chiwai E. Chan go to medical school?
Dr. Chan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2000.
What drugs does Dr. Chiwai E. Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen and Oxycodone HCl.
Has Dr. Chiwai E. Chan received payments from drug or device companies?
CMS Open Payments shows $4,768 in general payments to Dr. Chan from 28 companies from 2016 to 2025. The largest total came from Daiichi Sankyo Inc.
How long has Dr. Chiwai E. Chan been practicing?
Dr. Chan graduated from medical school in 2000, 26 years ago.
What insurance does Dr. Chiwai E. Chan accept?
Dr. Chan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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