John Chang, MD
Anesthesiology Physician · Mission Viejo, CA
John Chang, MD is an anesthesiology physician with a practice address in Mission Viejo, California, and NPI 1598704827, issued on Jun 5, 2006. Check the license (California A65638, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Chang
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A65638 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27401 Los Altos, Mission Viejo, CA 92691
- Phone
- (949) 582-9624
- Enumerated
- Jun 5, 2006
- Entity
- Type 1 · individual
Also registered at 27401 Los Altos
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Akrawi, MDAnesthesiology Physician1588619407
- Christopher Beatie, MDAnesthesiology Physician1518906874
- Talal Beydoun, MDNeuroradiology Physician1396751384
- Brian Boone, D.P.T.Physical Therapist1023320744
- Shawn Bullock, MDAnesthesiology Physician1164460978
- Mark Burkhardt, MDAnesthesiology Physician1346288214
Verify John Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A65638Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Industry payments in 2024: $619.12
2 payments, mostly food and beverage; the largest payer was Edwards Lifesciences Corporation. The 17,418 providers of this specialty with any payment received $898.38 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.
One hospital or facility affiliation
- Western Anesthesia Medical Associates IncMission Viejo, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
35 anesthesiology physician records list a Mission Viejo practice address
They are 35 of the 2,156 NPPES records with a Mission Viejo practice address, and 7,276 anesthesiology physician records in California.
All 35 in Mission Viejo → All 7,276 in California → Every provider in Mission Viejo →
Other anesthesiology physician records in California
- Alison A'Court, MDSan Diego, CA1912218199
- Peter Abaci, MDLos Gatos, CA1447200761
- Elma Abad-Pelsang, MDDel Mar, CA1689611923
- Rolando Abada, M.D.San Diego, CA1952319071
- Maher Abadir, MDTurlock, CA1669491718
- Jerry Abajian, M.D.Napa, CA1851336218
- Carolyn AbbasiLoma Linda, CA1811287311
- Christine Abboud, D.O.Walnut Creek, CA1174901508
- Steven Abboud, MDPalo Alto, CA1619364908
- Therese Abboud, M.D.Coronado, CA1003112913
Common questions
What is John Chang, MD's NPI number?
John Chang, MD's National Provider Identifier (NPI) is 1598704827, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Chang, MD located?
The NPPES record lists a practice address at 27401 Los Altos, Mission Viejo, CA, 92691. Phone: (949) 582-9624. Providers update this record themselves, so call before visiting.
How can I verify John Chang, MD's license?
NPPES lists California license number A65638, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.