Stephen Hyun Jo, M.D.
Otolaryngology Physician · Union City, CA
Stephen Hyun Jo, M.D. is an otolaryngology physician with a practice address in Union City, California, and NPI 1972651040, issued on Jan 8, 2007. Check the license (California A85540, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Hyun Jo
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- A85540 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3553 Whipple RD, Union City, CA 94587
- Phone
- (510) 454-1000
- Enumerated
- Jan 8, 2007
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080211000869); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 3553 Whipple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kristina Austin, M.D.Ophthalmology Physician1417007238
- Vijaya Basawaprasad, M.D.Internal Medicine Physician1588736326
Verify Stephen Hyun Jo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average otolaryngology physician in 2024
296 Medicare Part D claims for 124 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate98 claims
- Ciprofloxacin-Dexamethasone39 claims
- Omeprazole30 claims
- Ofloxacin22 claims
- Famotidine13 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 IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Hyun Jo among 1,212 otolaryngology physician records in California
Stephen Hyun Jo, M.D. is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2002 · median 2004 among the 818 with a school on file
- Record last updated2021 · 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 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Union City → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Kathleyn Brandstetter, M.D.Union City, CA 945871215375621
- Nina Chinosorn, M.D.Union City, CA 945871194966085
- Frank Lee, M.D.Union City, CA 945871174602965
- Elizabeth Rosen, M.D.Union City, CA 945871376615195
- Ann Smith, MDUnion City, CA 945871316025174
- Garani Nadaraja, M.D.Pleasanton, CA 945881477797603
- David Stone, MDPleasanton, CA 945881770687139
- Laurence Ariyasu, MDVallejo, CA 945891700964533
Common questions
What is Stephen Hyun Jo, M.D.'s NPI number?
Stephen Hyun Jo, M.D.'s National Provider Identifier (NPI) is 1972651040, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Hyun Jo, M.D. located?
The NPPES record lists a practice address at 3553 Whipple RD, Union City, CA, 94587. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.
How can I verify Stephen Hyun Jo, M.D.'s license?
NPPES lists California license number A85540, 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 Stephen Hyun Jo, M.D. prescribe under Medicare Part D?
In 2024, Stephen Hyun Jo, M.D. had 296 Medicare Part D claims for 124 beneficiaries; the average among otolaryngology physician prescribers was 541. 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.