Roger Hsio-Hsion Wang, M.D.
Adult Medicine Physician · Santa Ana, CA
Roger Hsio-Hsion Wang, M.D. is an adult medicine physician with a practice address in Santa Ana, California, and NPI 1982602579, issued on Jul 8, 2005. Check the license (California A44667, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roger Hsio-Hsion Wang
- Credential
- M.D.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A44667 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1125 E 17TH St, Santa Ana, CA 92701
- Phone
- (714) 835-1818
- Enumerated
- Jul 8, 2005
- Record last updated
- Oct 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (714) 835-7200
- Medicaid ID
- 00A446670 CA
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 1125 E 17TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yoon Choe, DDSDentist1811099948
- Margaret Desa, M.D.Specialist1144247990
Verify Roger Hsio-Hsion Wang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A44667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average adult medicine physician in 2024
840 Medicare Part D claims for 118 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium70 claims
- Amlodipine Besylate67 claims
- Atorvastatin Calcium62 claims
- Metformin Hcl59 claims
- Metoprolol Succinate35 claims
- Allopurinol32 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.
Roger Hsio-Hsion Wang among 386 adult medicine physician records in California
Roger Hsio-Hsion Wang, M.D. is one of 386 adult medicine physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 97% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2011 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Santa Ana → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Neal Schwartz, D.O.Santa Ana, CA 927011164592127
- Don Smith, M.D.Santa Ana, CA 927011336222355
- J Cassidy, M.D.Santa Ana, CA 927041528132487
- Ming Chen, D.O.Santa Ana, CA 927041376749101
- Lucio Loza, M.D.Santa Ana, CA 927041134352727
- Marian Bareh, M.D.Santa Ana, CA 927051518184241
- Alan Barton, M.D.Santa Ana, CA 927051831456854
- Karee Chrysovergis, FNPSanta Ana, CA 927051649805250
Common questions
What is Roger Hsio-Hsion Wang, M.D.'s NPI number?
Roger Hsio-Hsion Wang, M.D.'s National Provider Identifier (NPI) is 1982602579, issued on Jul 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Roger Hsio-Hsion Wang, M.D. located?
The NPPES record lists a practice address at 1125 E 17TH St, Santa Ana, CA, 92701. Phone: (714) 835-1818. Providers update this record themselves, so call before visiting.
How can I verify Roger Hsio-Hsion Wang, M.D.'s license?
NPPES lists California license number A44667, 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 Roger Hsio-Hsion Wang, M.D. prescribe under Medicare Part D?
In 2024, Roger Hsio-Hsion Wang, M.D. had 840 Medicare Part D claims for 118 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.