Michael George Loudin, M.D.
Gastroenterology Physician · Berkeley, CA
Michael George Loudin, M.D. is a gastroenterology physician with a practice address in Berkeley, California, and NPI 1932542156, issued on Apr 8, 2013. Check the license (California A159541, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael George Loudin
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A159541 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3100 San Pablo Ave # 420, Berkeley, CA 94702
- Phone
- (510) 985-5020
- Enumerated
- Apr 8, 2013
- Record last updated
- Mar 7, 2023
- Fax
- (510) 985-5282
- Medicare enrollment
- Enrolled (PECOS I20191018002594); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Verify Michael George Loudin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A159541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average gastroenterology physician in 2024
459 Medicare Part D claims for 148 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Omeprazole79 claims
- Pantoprazole Sodium51 claims
- Famotidine50 claims
- Nortriptyline Hcl31 claims
- Spironolactone31 claims
- Gavilyte-G29 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: $2,220.53
65 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- John Muir Physician NetworkBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael George Loudin among 2,140 gastroenterology physician records in California
Michael George Loudin, 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 2013, is newer than 80% of them.
- NPI issued2013 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2013 · median 2002 among the 1,538 with a school on file
- Record last updated2023 · 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 Berkeley → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Taft Bhuket, M.D.Berkeley, CA 947051427004415
- Huilan Cheng, M.D.Berkeley, CA 947051679684245
- Saurabh Gupta, M.D.Berkeley, CA 947051457669228
- Lisa Higa, M.D.Berkeley, CA 947051669583167
- Mehra Hosseini, M.D.Berkeley, CA 947051205947884
- Vinod Kurupath, M.D.Berkeley, CA 947051093972382
- Subhendu Narayan, M.D.Berkeley, CA 947051427169002
- Abhik Roy, M.D.Berkeley, CA 947051235455882
Common questions
What is Michael George Loudin, M.D.'s NPI number?
Michael George Loudin, M.D.'s National Provider Identifier (NPI) is 1932542156, issued on Apr 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Michael George Loudin, M.D. located?
The NPPES record lists a practice address at 3100 San Pablo Ave # 420, Berkeley, CA, 94702. Phone: (510) 985-5020. Providers update this record themselves, so call before visiting.
How can I verify Michael George Loudin, M.D.'s license?
NPPES lists California license number A159541, 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 Michael George Loudin, M.D. prescribe under Medicare Part D?
In 2024, Michael George Loudin, M.D. had 459 Medicare Part D claims for 148 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Michael George Loudin, 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.