Joo Ha Hwang, MD
Gastroenterology Physician · Stanford, CA
Joo Ha Hwang, MD is a gastroenterology physician with a practice address in Stanford, California, and NPI 1194815043, issued on Oct 13, 2006. Check the license (California C152676, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joo Ha Hwang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- C152676 CA
MD00037747 WA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Oct 13, 2006
- Record last updated
- Apr 26, 2024
- Medicaid ID
- 8374324 WA
- Medicare enrollment
- Enrolled (PECOS I20171220001240); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joo Ha Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C152676Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average gastroenterology physician in 2024
53 Medicare Part D claims for 44 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Peg 3350-Electrolyte26 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): 76.5 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: $196,550.26
190 payments; by number, the most common kind was food and beverage; the largest payer was Olympus Corporation of the Americas. The 13,350 providers of this specialty with any payment received $5,015.95 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Joo Ha Hwang among 2,140 gastroenterology physician records in California
Joo Ha Hwang, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1997 · median 2002 among the 1,538 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
70 gastroenterology physician records list a practice address in Stanford
They are 70 of the 5,606 NPPES records with a practice address in Stanford, and 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Stanford → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Aijaz Ahmed, MDStanford, CA 943051447351747
- Ashish Atreja, MDStanford, CA 943051831152883
- Ann Chen, MDStanford, CA 943051003840307
- Shai Friedland, M.D.Stanford, CA 943051316034655
- Jeffrey Glenn, M.D., PH.D.Stanford, CA 943051366523946
- Paul Kwo, M.D.Stanford, CA 943051578527008
- Uri Ladabaum, MDStanford, CA 943051245288059
- David Limsui, M.D.Stanford, CA 943051568449650
Common questions
What is Joo Ha Hwang, MD's NPI number?
Joo Ha Hwang, MD's National Provider Identifier (NPI) is 1194815043, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joo Ha Hwang, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Joo Ha Hwang, MD's license?
NPPES lists California license number C152676, 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 Joo Ha Hwang, MD prescribe under Medicare Part D?
In 2024, Joo Ha Hwang, MD had 53 Medicare Part D claims for 44 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Joo Ha Hwang, MD's MIPS final score?
The 2023 MIPS final score is 76.5 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.