Christopher Aoki, M.D.
Gastroenterology Physician · Sacramento, CA
Christopher Aoki, M.D. is a gastroenterology physician with a practice address in Sacramento, California, and NPI 1164460499, issued on Jun 2, 2006. Check the license (California A80649, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christopher Aoki
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- A80649 CA
14000 HI
Self-reported in NPPES; status is on the state search - Practice location
- 4150 V St, Sacramento, CA 95817
- Phone
- (916) 734-7183
- Enumerated
- Jun 2, 2006
- Record last updated
- Nov 19, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081027000633); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2001
- 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 4150 V St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amir Amini, M.D.Anesthesiology Physician1164699302
- Shubha Ananthakrishnan, MDNephrology Physician1275633869
Verify Christopher Aoki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A80649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average gastroenterology physician in 2024
834 Medicare Part D claims for 235 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Omeprazole128 claims
- Carvedilol106 claims
- Pantoprazole Sodium80 claims
- Peg 3350-Electrolyte76 claims
- Famotidine50 claims
- Ursodiol34 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.
Industry payments in 2024: $1,521.52
75 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. 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
- The Queens Medical CenterHonolulu, HI · Acute Care Hospitals3 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.
Christopher Aoki among 2,140 gastroenterology physician records in California
Christopher Aoki, M.D. 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
- Graduated2001 · median 2002 among the 1,538 with a school on file
- Record last updated2008 · 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).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Sacramento → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Amar Al-Juburi, M.D.Sacramento, CA 958171821041229
- Christopher Bowlus, M.D.Sacramento, CA 958171942252085
- Juan Garcia, M.D.Sacramento, CA 958171407809288
- Michael Lawson, MDSacramento, CA 958171245318922
- Joseph Leung, M.D.Sacramento, CA 958171861475287
- Valentina Medici, M.D.Sacramento, CA 958171902858541
- Mary Pauly, MDSacramento, CA 958171225116999
- Thomas Prindiville, M.D.Sacramento, CA 958171104879923
Common questions
What is Christopher Aoki, M.D.'s NPI number?
Christopher Aoki, M.D.'s National Provider Identifier (NPI) is 1164460499, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Aoki, M.D. located?
The NPPES record lists a practice address at 4150 V St, Sacramento, CA, 95817. Phone: (916) 734-7183. Providers update this record themselves, so call before visiting.
How can I verify Christopher Aoki, M.D.'s license?
NPPES lists California license number A80649, 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 Christopher Aoki, M.D. prescribe under Medicare Part D?
In 2024, Christopher Aoki, M.D. had 834 Medicare Part D claims for 235 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.