David Zack, D.O.
Gastroenterology Physician · Toledo, OH
David Zack, D.O. is a gastroenterology physician with a practice address in Toledo, Ohio, and NPI 1407955008, issued on Sep 21, 2006. Check the license (Ohio 34006071, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- David Zack
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 34006071 OH
Self-reported in NPPES; status is on the state search - Practice location
- 4841 Monroe St, Toledo, OH 43623
- Phone
- (419) 471-1317
- Enumerated
- Sep 21, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (419) 471-1316
- Medicare enrollment
- Enrolled (PECOS I20090804000842); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1992
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 741 in Ohio → Look up another NPI →
Also registered at 4841 Monroe St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ellen Greene Bush, PHDClinical Psychologist1740204056
- Anna Clocksin BoggsBehavior Analyst1508206699
- Scott Corman, D.O.Gastroenterology Physician1750584991
- Abby EnserOccupational Therapist1356775795
- Christine HaggertyAdult Health Nurse Practitioner1457649089
- S Hamdani, M.D.Gastroenterology Physician1992718514
Verify David Zack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 34006071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,722 Medicare Part D claims for 514 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Pantoprazole Sodium339 claims
- Famotidine135 claims
- Omeprazole121 claims
- Sod Sulf-Potass Sulf-Mag Sulf106 claims
- Gavilyte-G94 claims
- Peg-3350 And Electrolytes74 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: $2,068.55
125 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
- Northwest Ohio Gastroenterology Associates IncToledo, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Zack among 741 gastroenterology physician records in Ohio
David Zack, D.O. is one of 741 gastroenterology physician records with a practice address in Ohio. 82% 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 22% of them.
- NPI issued2006 · 22% of these records are older, 47% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1992 · median 2003 among the 540 with a school on file
- Record last updated2007 · 48% 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 Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Ohio
There are 741 gastroenterology physician records in Ohio.
All 741 in Ohio → Every provider in Toledo → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Kevin Behrle, MDToledo, OH 436231285632810
- Scott Corman, D.O.Toledo, OH 436231750584991
- S Hamdani, M.D.Toledo, OH 436231992718514
- Patricia Oster, C.N.P.Toledo, OH 436231780783316
- Harsant Padda, MDToledo, OH 436231508863366
- Michael Pappas, MDToledo, OH 436231437110442
- Sapna Reddy, MDToledo, OH 436231023015708
- Mark Gretsinger, M.D.Toledo, OH 436171407843758
Common questions
What is David Zack, D.O.'s NPI number?
David Zack, D.O.'s National Provider Identifier (NPI) is 1407955008, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Zack, D.O. located?
The NPPES record lists a practice address at 4841 Monroe St, Toledo, OH, 43623. Phone: (419) 471-1317. Providers update this record themselves, so call before visiting.
How can I verify David Zack, D.O.'s license?
NPPES lists Ohio license number 34006071, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Zack, D.O. prescribe under Medicare Part D?
In 2024, David Zack, D.O. had 1,722 Medicare Part D claims for 514 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.
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.