Chiwai E. Chan, D.O.
Interventional Pain Medicine Physician · Fountain Valley, CA
Chiwai E. Chan, D.O. is an interventional pain medicine physician with a practice address in Fountain Valley, California, and NPI 1629051529, issued on Nov 23, 2005. Check the license (California 20A8068, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chiwai E. Chan
- Credential
- D.O.
- Primary taxonomy
- Interventional Pain Medicine Physician 208VP0014X
- License numbers
- 20A8068 CA
4242 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 11160 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 424-9300
- Enumerated
- Nov 23, 2005
- Record last updated
- Dec 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (714) 424-9324
- Medicare enrollment
- Enrolled (PECOS I20061207000483); may accept Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 11160 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shlomi Albert, M.D.Urology Physician1144259946
- Dustin Briggs, CST, CSFASurgical Assistant1457547671
- Alberto CacheroPhysical Therapist1245301092
- Steven Chan, D.D.S.General Practice Dentistry1396748240
- Philip Chin, M.D.Specialist1548224629
- Hae-Young Cho, M.D.Specialist1760584551
Verify Chiwai E. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8068Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average interventional pain medicine physician in 2024
716 Medicare Part D claims for 262 beneficiaries, against an average of 2,306 among the 2,100 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 482 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen190 claims
- Oxycodone-Acetaminophen80 claims
- Oxycodone Hcl74 claims
- Hydromorphone Hcl39 claims
- Tramadol Hcl37 claims
- Gabapentin27 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $111.79
6 payments; by number, the most common kind was food and beverage; the largest payer was Scilex Pharmaceuticals Inc. The 1,966 providers of this specialty with any payment received $3,889.53 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Interventional Pain Medicine Physician providers in California
There are 219 interventional pain medicine physician records in California.
Other interventional pain medicine physician records in California
- Peter Abaci, MDLos Gatos, CA1447200761
- Hussein Abdulhadi, M.D.Santee, CA1629004890
- Nader Achackzad, M.D.Santa Clara, CA1831375302
- Sam Ahdab, M.D.West Covina, CA1992941397
- Roozbeh Ahmadi, M.D.Lodi, CA1134657943
- Patrick Akin, DOTurlock, CA1073072096
- Kais Alsharif, MDLong Beach, CA1730380007
- John Benjamin Arevalo, MD, MBASan Francisco, CA1629561170
- Ezell Askew, MDLodi, CA1699760769
- Kamyar Assil, MDThousand Oaks, CA1750321568
Common questions
What is Chiwai E. Chan, D.O.'s NPI number?
Chiwai E. Chan, D.O.'s National Provider Identifier (NPI) is 1629051529, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Chiwai E. Chan, D.O. located?
The NPPES record lists a practice address at 11160 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 424-9300. Providers update this record themselves, so call before visiting.
How can I verify Chiwai E. Chan, D.O.'s license?
NPPES lists California license number 20A8068, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chiwai E. Chan, D.O. prescribe under Medicare Part D?
In 2024, Chiwai E. Chan, D.O. had 716 Medicare Part D claims for 262 beneficiaries; the average among interventional pain medicine physician prescribers was 2,306. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.