Gregory J. Wiener, M.D
Gastroenterology Physician · Chula Vista, CA
Gregory J. Wiener, M.D is a gastroenterology physician with a practice address in Chula Vista, California, and NPI 1811099534, issued on Sep 2, 2006. Check the license (California A41749, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory J. Wiener
- Credential
- M.D
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A41749 CA
Self-reported in NPPES; status is on the state search - Practice location
- 353 Church Ave # A, Chula Vista, CA 91910
- Phone
- (619) 585-8883
- Enumerated
- Sep 2, 2006
- Record last updated
- Aug 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (619) 585-8892
- Medicaid ID
- 00A417490 CA
- Medicare enrollment
- Enrolled (PECOS I20080407000654); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Verify Gregory J. Wiener in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A41749Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average gastroenterology physician in 2024
1,145 Medicare Part D claims for 511 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Esomeprazole Magnesium232 claims
- Sucralfate204 claims
- Pantoprazole Sodium126 claims
- Sod Sulf-Potass Sulf-Mag Sulf85 claims
- Gavilyte-G76 claims
- Linzess63 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: $375.88
7 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. 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.
Bills Medicare through one group practice
- Gregory J Wiener M D Professional CorporationChula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory J. Wiener among 2,140 gastroenterology physician records in California
Gregory J. Wiener, 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
- Graduated1982 · median 2002 among the 1,538 with a school on file
- Record last updated2015 · 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 Chula Vista → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Erick Alayo, M.D.Chula Vista, CA 919101841454758
- Ivan Cubas, MDChula Vista, CA 919101447464912
- John Duque, M.D.Chula Vista, CA 919101295710747
- Mark Johnson, M.D.Chula Vista, CA 919101861421372
- Steven Brozinsky, M.D.Chula Vista, CA 919111649266834
- Errol Korn, M.D.Chula Vista, CA 919111922041052
- Edward Singer, M.D.Chula Vista, CA 919111679569743
- Mohammad Soleimanpour, M.D.La Mesa, CA 919411194714527
Common questions
What is Gregory J. Wiener, M.D's NPI number?
Gregory J. Wiener, M.D's National Provider Identifier (NPI) is 1811099534, issued on Sep 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory J. Wiener, M.D located?
The NPPES record lists a practice address at 353 Church Ave # A, Chula Vista, CA, 91910. Phone: (619) 585-8883. Providers update this record themselves, so call before visiting.
How can I verify Gregory J. Wiener, M.D's license?
NPPES lists California license number A41749, 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 Gregory J. Wiener, M.D prescribe under Medicare Part D?
In 2024, Gregory J. Wiener, M.D had 1,145 Medicare Part D claims for 511 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.