Abraham K. Chung, M.D.
Hospitalist Physician · Walnut Creek, CA
Abraham K. Chung, M.D. is a hospitalist physician with a practice address in Walnut Creek, California, and NPI 1104845858, issued on Jul 19, 2006. Check the license (California A74982, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Abraham K. Chung
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A74982 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 947-3393
- Enumerated
- Jul 19, 2006
- Record last updated
- Aug 5, 2026
- Fax
- (925) 947-3396
- Medicaid ID
- 00A749820 CA
- Medicare enrollment
- Enrolled (PECOS I20090121000608); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1601 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Abraham K. Chung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74982Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average hospitalist physician in 2024
178 Medicare Part D claims for 68 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Pantoprazole Sodium14 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): 85.7 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: $20.22
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 7,324 providers of this specialty with any payment received $494.84 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 one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Abraham K. Chung among 3,099 hospitalist physician records in California
Abraham K. Chung, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1999 · median 2010 among the 2,505 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 hospitalist physician records list a practice address in Walnut Creek
They are 68 of the 6,170 NPPES records with a practice address in Walnut Creek, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Walnut Creek → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Andreux Chernne, MDWalnut Creek, CA 945981578520003
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- Yungting Liao, MDWalnut Creek, CA 945981780696039
- Kristine Santiano, MDWalnut Creek, CA 945981255759130
- Monica Stiles, DOWalnut Creek, CA 945981811524507
- Jonathan Waller, MD/MPHWalnut Creek, CA 945981801324264
- Bradley Zerweck, M.D.Walnut Creek, CA 945981003087206
- Melissa Owens, M.D.Walnut Creek, CA 945971568607414
Common questions
What is Abraham K. Chung, M.D.'s NPI number?
Abraham K. Chung, M.D.'s National Provider Identifier (NPI) is 1104845858, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Abraham K. Chung, M.D. located?
The NPPES record lists a practice address at 1601 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 947-3393. Providers update this record themselves, so call before visiting.
How can I verify Abraham K. Chung, M.D.'s license?
NPPES lists California license number A74982, 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 Abraham K. Chung, M.D. prescribe under Medicare Part D?
In 2024, Abraham K. Chung, M.D. had 178 Medicare Part D claims for 68 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Abraham K. Chung, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 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.