Yenjean Hwang, M.D.
Infectious Disease Physician · Oakland, CA
Yenjean Hwang, M.D. is an infectious disease physician with a practice address in Oakland, California, and NPI 1194744557, issued on Jul 18, 2006. Check the license (California A68164, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yenjean Hwang
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A68164 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3100 Summit Street, Oakland, CA 94609
- Phone
- (510) 869-8400
- Enumerated
- Jul 18, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00A681640 CA
- Medicare enrollment
- Enrolled (PECOS I20051004001014); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 3100 Summit Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Burack, M.D.Internal Medicine Physician1316967474
- Mitchell D'Arata, N.P.Nurse Practitioner1730108309
- Amy Garlin, M.D.Internal Medicine Physician1346269719
- Deborah Royal, N.P.Nurse Practitioner1801815410
Verify Yenjean Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A68164Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average infectious disease physician in 2024
1,709 Medicare Part D claims for 220 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 102 claims were for opioids.
Most prescribed
- Azithromycin65 claims
- Amlodipine Besylate51 claims
- Atorvastatin Calcium50 claims
- Lorazepam35 claims
- Paxlovid35 claims
- Zolpidem Tartrate35 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,507.42
21 payments; by number, the most common kind was food and beverage; the largest payer was Microsurgical Technology, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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 2 group practices
- Bay Infectious DiseaseOrinda, CA
- Whiting And Whiting, A Professional CorpOrinda, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yenjean Hwang among 1,119 infectious disease physician records in California
Yenjean Hwang, M.D. is one of 1,119 infectious disease 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1994 · median 2003 among the 735 with a school on file
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Oakland → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Nupur Gupta, D.O.Oakland, CA 946091417375940
- Neelima Kethineni, M.D.Oakland, CA 946091629021662
- Scott Weisenberg, M.D.Oakland, CA 946091366609042
- Elizabeth Anderson, MDOakland, CA 946111922170760
- Mark Lee, M.D.Oakland, CA 946111184708828
- Joseph Marzouk, M.D.Oakland, CA 946111174636393
- Alex PelliccioneOakland, CA 946111407315708
- Roger Phelps, M.D.Piedmont, CA 946111629188990
Common questions
What is Yenjean Hwang, M.D.'s NPI number?
Yenjean Hwang, M.D.'s National Provider Identifier (NPI) is 1194744557, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yenjean Hwang, M.D. located?
The NPPES record lists a practice address at 3100 Summit Street, Oakland, CA, 94609. Phone: (510) 869-8400. Providers update this record themselves, so call before visiting.
How can I verify Yenjean Hwang, M.D.'s license?
NPPES lists California license number A68164, 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 Yenjean Hwang, M.D. prescribe under Medicare Part D?
In 2024, Yenjean Hwang, M.D. had 1,709 Medicare Part D claims for 220 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Yenjean Hwang, M.D.'s MIPS final score?
The 2023 MIPS final score is 81 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.