Thomas N. Hwang, M.D.
Ophthalmology Physician · San Francisco, CA
Thomas N. Hwang, M.D. is an ophthalmology physician with a practice address in San Francisco, California, and NPI 1023033495, issued on Jul 13, 2006. Check the license (California H88457, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas N. Hwang
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- H88457 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave # 344, San Francisco, CA 94143
- Phone
- (415) 353-2142
- Enumerated
- Jul 13, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (415) 476-0336
- Medicaid ID
- 00A847100 CA
- Medicare enrollment
- Enrolled (PECOS I20060905000276); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Verify Thomas N. Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license H88457Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average ophthalmology physician in 2024
553 Medicare Part D claims for 141 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Latanoprost91 claims
- Timolol Maleate60 claims
- Prednisone55 claims
- Brimonidine Tartrate49 claims
- Dorzolamide-Timolol33 claims
- Neomycin-Polymyxin-Dexameth32 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.
Bills Medicare through one group practice
- Permanente Medical Group IncRedwood City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas N. Hwang among 2,899 ophthalmology physician records in California
Thomas N. Hwang, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2002 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in San Francisco → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Nisha Acharya, M.D.San Francisco, CA 941431972544872
- Robert Bhisitkul, MDSan Francisco, CA 941431831138676
- Joseph Crawford, MDSan Francisco, CA 941431831141712
- Eugene De Juan, MDSan Francisco, CA 941431043262074
- Jacque Duncan, MDSan Francisco, CA 941431942252978
- Allan Flach, MDSan Francisco, CA 941431043261134
- Jonathan Horton, MDSan Francisco, CA 941431992757363
- David Hwang, MDSan Francisco, CA 941431346292224
Common questions
What is Thomas N. Hwang, M.D.'s NPI number?
Thomas N. Hwang, M.D.'s National Provider Identifier (NPI) is 1023033495, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas N. Hwang, M.D. located?
The NPPES record lists a practice address at 400 Parnassus Ave # 344, San Francisco, CA, 94143. Phone: (415) 353-2142. Providers update this record themselves, so call before visiting.
How can I verify Thomas N. Hwang, M.D.'s license?
NPPES lists California license number H88457, 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 Thomas N. Hwang, M.D. prescribe under Medicare Part D?
In 2024, Thomas N. Hwang, M.D. had 553 Medicare Part D claims for 141 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.