Daniel Rengstorff, M.D.
Gastroenterology Physician · San Mateo, CA
Daniel Rengstorff, M.D. is a gastroenterology physician with a practice address in San Mateo, California, and NPI 1033295662, issued on Oct 27, 2006. Check the license (California A75430, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Daniel Rengstorff
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A75430 CA
Self-reported in NPPES; status is on the state search - Practice location
- 218 DE Anza Blvd, San Mateo, CA 94402
- Phone
- (650) 341-9131
- Enumerated
- Oct 27, 2006
- Record last updated
- Oct 7, 2024
- Medicaid ID
- GR0025350 CA
- Medicare enrollment
- Enrolled (PECOS I20040826000752); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1998
- 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 218 DE Anza Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Daniel Rengstorff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A75430Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average gastroenterology physician in 2024
691 Medicare Part D claims for 244 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Pantoprazole Sodium170 claims
- Sod Sulf-Potass Sulf-Mag Sulf68 claims
- Famotidine47 claims
- Omeprazole45 claims
- Gavilyte-G34 claims
- Creon28 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: $59.79
3 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 2 group practices
- Regents OF The University OF California - UcsfSan Francisco, CA
- Ucsf Medical Group Business ServicesBurlingame, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Rengstorff among 2,140 gastroenterology physician records in California
Daniel Rengstorff, 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
- Graduated1998 · median 2002 among the 1,538 with a school on file
- Record last updated2024 · 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 San Mateo → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Robert Wilkes, MDSan Mateo, CA 944021184703217
- Stanley Hui, M.D.San Mateo, CA 944031023196888
- Stanley Rockman, M.D.San Mateo, CA 944031447318829
- Daud Akhtar, MDStanford, CA 943051205666245
- Smit Deliwala, MDStanford, CA 943051619437035
- Jennifer Dimino, MDStanford, CA 943051932698891
- Abhishek Dimopoulos-Verma, MDStanford, CA 943051962994384
- Ikponmwosa Enofe, MDStanford, CA 943051831619527
Common questions
What is Daniel Rengstorff, M.D.'s NPI number?
Daniel Rengstorff, M.D.'s National Provider Identifier (NPI) is 1033295662, issued on Oct 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Rengstorff, M.D. located?
The NPPES record lists a practice address at 218 DE Anza Blvd, San Mateo, CA, 94402. Phone: (650) 341-9131. Providers update this record themselves, so call before visiting.
How can I verify Daniel Rengstorff, M.D.'s license?
NPPES lists California license number A75430, 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 Daniel Rengstorff, M.D. prescribe under Medicare Part D?
In 2024, Daniel Rengstorff, M.D. had 691 Medicare Part D claims for 244 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Daniel Rengstorff, M.D.'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.