Denley Jang, M.D.
Internal Medicine Physician · San Jose, CA
Denley Jang, M.D. is an internal medicine physician with a practice address in San Jose, California, and NPI 1659479970, issued on Sep 20, 2006. Check the license (California A055262, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Denley Jang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A055262 CA
Self-reported in NPPES; status is on the state search - Practice location
- 80 Great Oaks Blvd, San Jose, CA 95119
- Phone
- (408) 363-3000
- Enumerated
- Sep 20, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 80 Great Oaks Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mona Bazzi, MSWClinical Social Worker1760631840
- Anne Bradford, RN, NPAdult Health Nurse Practitioner1619998226
- Benjamin Bregman, MDPsychiatry Physician1962647925
- Deena Bunzel, RNPGerontology Nurse Practitioner1871548701
Verify Denley Jang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A055262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
31 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Denley Jang among 17,696 internal medicine physician records in California
Denley Jang, M.D. is one of 17,696 internal medicine 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
428 internal medicine physician records list a practice address in San Jose
They are 428 of the 20,925 NPPES records with a practice address in San Jose, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Jose → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Monte Bernstein, M.D.San Jose, CA 951191730262593
- Jagpreet Bhatia, MDSan Jose, CA 951191205912722
- Malathi Charlu, MDSan Jose, CA 951191316023815
- Cornelia Chin, MDSan Jose, CA 951191104902634
- Monica Delzeit, M.D.San Jose, CA 951191912005349
- Sony Haris, MDSan Jose, CA 951191750467288
- John Kabahit, DOSan Jose, CA 951191073699583
- Robert Lemons, M.D.San Jose, CA 951191871693606
Common questions
What is Denley Jang, M.D.'s NPI number?
Denley Jang, M.D.'s National Provider Identifier (NPI) is 1659479970, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Denley Jang, M.D. located?
The NPPES record lists a practice address at 80 Great Oaks Blvd, San Jose, CA, 95119. Phone: (408) 363-3000. Providers update this record themselves, so call before visiting.
How can I verify Denley Jang, M.D.'s license?
NPPES lists California license number A055262, 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 Denley Jang, M.D. prescribe under Medicare Part D?
In 2024, Denley Jang, M.D. had 31 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.