NPPES file of Aug 9, 2026

Christopher Robert Entwisle, M.D.

Gastroenterology Physician · Livermore, CA

Christopher Robert Entwisle, M.D. is a gastroenterology physician with a practice address in Livermore, California, and NPI 1841256963, issued on Apr 26, 2006. Check the license (California A95045, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1841256963
Name
Christopher Robert Entwisle
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
A95045 CA
Self-reported in NPPES; status is on the state search
Practice location
1133 E Stanley Blvd, Livermore, CA 94550
Phone
(925) 245-1238
Enumerated
Apr 26, 2006
Record last updated
Apr 8, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(925) 245-9849
Medicare enrollment
Enrolled (PECOS I20060530000245); accepts Medicare assignment
Medical or professional school
New York Medical College, 2000
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →

Also registered at 1133 E Stanley Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michael Beckley, D.D.S.Oral and Maxillofacial Surgery (Dentist)1437231925
  2. Michael Bleecker, M.D.Obstetrics & Gynecology Physician1437218328
  3. Vicente Chiong, MDPediatrics Physician1558310599
  4. Scott Eaton, M.D.Obstetrics Physician1285793836
  5. Johnette Leikam, MDPediatrics Physician1407805484
  6. Lara Lembach, MDPediatrics Physician1467401455

Verify Christopher Robert Entwisle in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A95045    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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2.3 times the Medicare Part D claims of the average gastroenterology physician in 2024

1,891 Medicare Part D claims for 609 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.

  1. Christopher Entwisle1,891
  2. Specialty average811

Most prescribed

  1. Pantoprazole Sodium728 claims
  2. Omeprazole212 claims
  3. Sod Sulf-Potass Sulf-Mag Sulf115 claims
  4. Linzess75 claims
  5. Mesalamine59 claims
  6. Dexlansoprazole Dr40 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: $283.95

25 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.

  1. Christopher Entwisle$283.95
  2. Specialty average$5,015.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

One hospital affiliation

  1. Stanford Health CareStanford, CA · Acute Care Hospitals5 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 Robert Entwisle among 2,140 gastroenterology physician records in California

Christopher Robert Entwisle, 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
  • Graduated2000 · 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 Livermore → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Ru Min Lee, M.D.Livermore, CA 945501225413719
  2. Hemnishil Marella, DOLivermore, CA 945501760915771
  3. Kayvon Sotoudeh, M.D.Livermore, CA 945501659812857
  4. Dina Ezzeddine, M.D.Lafayette, CA 945491598749715
  5. Terence Heywood, MDMartinez, CA 945531871671362
  6. Randall Lee, MDMartinez, CA 945531245216803
  7. Albert Palitz, MDMartinez, CA 945531255419735
  8. Arati Pratap, M.D.Martinez, CA 945531740228931

Common questions

What is Christopher Robert Entwisle, M.D.'s NPI number?

Christopher Robert Entwisle, M.D.'s National Provider Identifier (NPI) is 1841256963, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Christopher Robert Entwisle, M.D. located?

The NPPES record lists a practice address at 1133 E Stanley Blvd, Livermore, CA, 94550. Phone: (925) 245-1238. Providers update this record themselves, so call before visiting.

How can I verify Christopher Robert Entwisle, M.D.'s license?

NPPES lists California license number A95045, 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 Robert Entwisle, M.D. prescribe under Medicare Part D?

In 2024, Christopher Robert Entwisle, M.D. had 1,891 Medicare Part D claims for 609 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.