NPPES file of Aug 9, 2026

Benjamin Zimmerman Root, M.D.

Gastroenterology Physician · Saint Louis, MO

Benjamin Zimmerman Root, M.D. is a gastroenterology physician with a practice address in Saint Louis, Missouri, and NPI 1619355765, issued on May 9, 2015. Check the license (Missouri 2021008458, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; 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
1619355765
Name
Benjamin Zimmerman Root
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
2021008458 MO
Self-reported in NPPES; status is on the state search
Practice location
11525 Olde Cabin RD, Saint Louis, MO 63141
Phone
(314) 279-9049
Enumerated
May 9, 2015
Record last updated
Jun 28, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(314) 997-5086
Medicare enrollment
Enrolled (PECOS I20210518000787); accepts Medicare assignment
Medical or professional school
Jefferson Medical College Of Thomas Jefferson University, 2015
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 414 in Missouri → Look up another NPI →

Also registered at 11525 Olde Cabin RD

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

  1. Nikhil Banerjee, M.D.Gastroenterology Physician1932424850
  2. Roman Hailu, FNPNurse Practitioner1538413794
  3. Aman Singh, MDGastroenterology Physician1548237845

Verify Benjamin Zimmerman Root in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2021008458    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 Missouri 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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75% more Medicare Part D claims than the average gastroenterology physician in 2024

1,417 Medicare Part D claims for 635 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.

  1. Benjamin Root1,417
  2. Specialty average811

Most prescribed

  1. Ondansetron Odt409 claims
  2. Omeprazole281 claims
  3. Sod Sulf-Potass Sulf-Mag Sulf123 claims
  4. Pantoprazole Sodium120 claims
  5. Plenvu94 claims
  6. Gavilyte-G37 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: $3,649.24

193 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. Benjamin Root$3,649.24
  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.

Bills Medicare through one group practice

  1. Digestive Health Specialists LLCCreve Coeur, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Benjamin Zimmerman Root among 414 gastroenterology physician records in Missouri

Benjamin Zimmerman Root, M.D. is one of 414 gastroenterology physician records with a practice address in Missouri. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 81% of them.

  • NPI issued2015 · 81% of these records are older, 16% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 73% of these records are
  • Graduated2015 · median 2003 among the 303 with a school on file
  • Record last updated2021 · 47% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gastroenterology Physician providers in Missouri

There are 414 gastroenterology physician records in Missouri.

All 414 in Missouri → Every provider in Saint Louis → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Marc Bernstein, M.D.Saint Louis, MO 631411336110543
  2. John Farrell, M.D.Saint Louis, MO 631411194724724
  3. Mohammad Tarik Firozi, MDSaint Louis, MO 631411962481648
  4. David Goran, MDSaint Louis, MO 631411578672648
  5. Elizabeth Huebner, MDCreve Coeur, MO 631411760592794
  6. Paul King, M.D.Saint Louis, MO 631411609872704
  7. Muddasani Reddy, DOSaint Louis, MO 631411013930585
  8. Rajesh Shah, M.D.Saint Louis, MO 631411912066382

Common questions

What is Benjamin Zimmerman Root, M.D.'s NPI number?

Benjamin Zimmerman Root, M.D.'s National Provider Identifier (NPI) is 1619355765, issued on May 9, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Benjamin Zimmerman Root, M.D. located?

The NPPES record lists a practice address at 11525 Olde Cabin RD, Saint Louis, MO, 63141. Phone: (314) 279-9049. Providers update this record themselves, so call before visiting.

How can I verify Benjamin Zimmerman Root, M.D.'s license?

NPPES lists Missouri license number 2021008458, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Benjamin Zimmerman Root, M.D. prescribe under Medicare Part D?

In 2024, Benjamin Zimmerman Root, M.D. had 1,417 Medicare Part D claims for 635 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.