Alex Chao, DO
Endocrinology, Diabetes & Metabolism Physician · Woodland, CA
Alex Chao, DO is an endocrinology, diabetes & metabolism physician with a practice address in Woodland, California, and NPI 1528528130, issued on Mar 20, 2019. Check the license (California 22081, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alex Chao
- Credential
- DO
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 22081 CA
Self-reported in NPPES; status is on the state search - Practice location
- 632 W Gibson RD, Woodland, CA 95695
- Phone
- (530) 668-2600
- Enumerated
- Mar 20, 2019
- Record last updated
- Sep 30, 2024
- Fax
- (530) 661-1054
- Medicare enrollment
- Enrolled (PECOS I20241002003556); accepts Medicare assignment
- Medical or professional school
- Touro Un Col Of Osteopathic Medicine, Henderson, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 632 W Gibson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Clariza Aguillon-Doms, NPNurse Practitioner1174836993
- Sammy Almashat, M.D.Occupational Medicine Physician1194987578
- Khuram Arif, MDPediatrics Physician1851492268
- Irma Bernal, NPFamily Nurse Practitioner1902553878
Verify Alex Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 22081Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
83 Medicare Part D claims for 32 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of 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: $627.16
10 payments; by number, the most common kind was food and beverage; the largest payer was Corcept Therapeutics. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Bills Medicare through one group practice
- Permanente Medical Group IncFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alex Chao among 1,131 endocrinology, diabetes & metabolism physician records in California
Alex Chao, DO is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 94% of them.
- NPI issued2019 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2019 · median 2003 among the 779 with a school on file
- Record last updated2024 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Woodland → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Shazia Faiz, M.DWoodland, CA 956951831392158
- Maggie Che, MDVacaville, CA 956881215015045
- Miya Allen, M.D.Vacaville, CA 956871124285150
- Deborah Murray, M.D.Vacaville, CA 956871962476895
- Manish Upadhyay, MDRoseville, CA 956781962432039
- Michael Laidlaw, M.D.,Rocklin, CA 956771376580241
- Gerald Bishop, M.D.Rancho Cordova, CA 956701013282904
- Richa Bhattarai, M.DRoseville, CA 956611407298458
Common questions
What is Alex Chao, DO's NPI number?
Alex Chao, DO's National Provider Identifier (NPI) is 1528528130, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Alex Chao, DO located?
The NPPES record lists a practice address at 632 W Gibson RD, Woodland, CA, 95695. Phone: (530) 668-2600. Providers update this record themselves, so call before visiting.
How can I verify Alex Chao, DO's license?
NPPES lists California license number 22081, 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 Alex Chao, DO prescribe under Medicare Part D?
In 2024, Alex Chao, DO had 83 Medicare Part D claims for 32 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.