Roxanne Giselle G Lim, MD
Gastroenterology Physician · Newport Beach, CA
Roxanne Giselle G Lim, MD is a gastroenterology physician with a practice address in Newport Beach, California, and NPI 1154587368, issued on Aug 6, 2008. Check the license (California A128032, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roxanne Giselle G Lim
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- A128032 CA
2012026122 MO
Self-reported in NPPES; status is on the state search - Practice location
- 400 Newport Center Dr, Newport Beach, CA 92660
- Phone
- (949) 760-0398
- Enumerated
- Aug 6, 2008
- Record last updated
- Apr 11, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140728001623); accepts Medicare assignment
- 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 400 Newport Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Barber, MDObstetrics & Gynecology Physician1336257138
- Michael Barnes, DDSDentist1801002787
- H. Brennan, M.D.Otolaryngology/Facial Plastic Surgery Physician1558396895
- Susan Cederstrom, M.D.Internal Medicine Physician1578529012
- John Chiu, MDAllergy & Immunology Physician1326121716
- H Chun, MDPlastic Surgery Physician1902961691
Verify Roxanne Giselle G Lim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128032Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% more Medicare Part D claims than the average gastroenterology physician in 2024
1,354 Medicare Part D claims for 431 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole265 claims
- Pantoprazole Sodium222 claims
- Famotidine148 claims
- Sucralfate81 claims
- Sod Sulf-Potass Sulf-Mag Sulf51 claims
- Dexlansoprazole Dr48 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): 100 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: $2,470.61
128 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, 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.
Bills Medicare through one group practice
- United Medical DoctorsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roxanne Giselle G Lim among 2,140 gastroenterology physician records in California
Roxanne Giselle G Lim, 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 2008, is newer than 63% of them.
- NPI issued2008 · 63% of these records are older, 31% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2006 · 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 Newport Beach → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Norman Bain, MDNewport Beach, CA 926601447330469
- Peter Broekelschen, MDNewport Beach, CA 926601366631525
- Brett Hughes, MDNewport Beach, CA 926601831630243
- Shahla Rah, M.D.Newport Beach, CA 926601356370209
- Kathryn Ross, M.D.Newport Beach, CA 926601871537035
- Angizeh Sadeghi, MDNewport Beach, CA 926601538211917
- Surinder Saini, M.D.Newport Beach, CA 926601750304671
- Parminder Dhaliwal, MDNewport Beach, CA 926631811913759
Common questions
What is Roxanne Giselle G Lim, MD's NPI number?
Roxanne Giselle G Lim, MD's National Provider Identifier (NPI) is 1154587368, issued on Aug 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Roxanne Giselle G Lim, MD located?
The NPPES record lists a practice address at 400 Newport Center Dr, Newport Beach, CA, 92660. Phone: (949) 760-0398. Providers update this record themselves, so call before visiting.
How can I verify Roxanne Giselle G Lim, MD's license?
NPPES lists California license number A128032, 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 Roxanne Giselle G Lim, MD prescribe under Medicare Part D?
In 2024, Roxanne Giselle G Lim, MD had 1,354 Medicare Part D claims for 431 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Roxanne Giselle G Lim, MD's MIPS final score?
The 2023 MIPS final score is 100 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.