Mark S. Tanker, D.O.
Gastroenterology Physician · Philadelphia, PA
Mark S. Tanker, D.O. is a gastroenterology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1831137538, issued on Jun 3, 2006. Check the license (Pennsylvania OS004028L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark S. Tanker
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- OS004028L PA
Self-reported in NPPES; status is on the state search - Practice location
- 700 Cottman Ave, Philadelphia, PA 19111
- Phone
- (215) 742-9900
- Enumerated
- Jun 3, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (215) 742-7051
- Medicaid ID
- 000859825/0002 PA
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,049 in Pennsylvania → Look up another NPI →
Also registered at 700 Cottman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Corey Brotz, MDGastroenterology Physician1609081041
- Christina BurgesePhysician Assistant1922754712
- Sarah Combs, PHYSICIAN ASSISTANTMedical Physician Assistant1134630452
- Frank Cosentino, CRNACertified Registered Nurse Anesthetist1124080882
- Bruce Gelman, M.D.Gastroenterology Physician1699790790
- Gilbert Grossman, MDCardiovascular Disease Physician1124092739
Verify Mark S. Tanker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS004028LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average gastroenterology physician in 2024
82 Medicare Part D claims for 30 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Famotidine28 claims
- Omeprazole14 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: $107.42
5 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.
Mark S. Tanker among 1,049 gastroenterology physician records in Pennsylvania
Mark S. Tanker, D.O. is one of 1,049 gastroenterology physician records with a practice address in Pennsylvania. 85% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 47% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2007 · 63% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Pennsylvania
There are 1,049 gastroenterology physician records in Pennsylvania.
All 1,049 in Pennsylvania → Every provider in Philadelphia → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- William Battle, M.D.Philadelphia, PA 191111679593248
- Corey Brotz, MDPhiladelphia, PA 191111609081041
- Keith Buhl, M.D.Philadelphia, PA 191111962428433
- Mark Codella, M.D.Philadelphia, PA 191111356361919
- Bruce Gelman, M.D.Philadelphia, PA 191111699790790
- Oleh Haluszka, M.D.Philadelphia, PA 191111972573582
- Richard Moses, D.O.Philadelphia, PA 191111588689525
- Minhhuyen Nguyen, M.D.Philadelphia, PA 191111477527547
Common questions
What is Mark S. Tanker, D.O.'s NPI number?
Mark S. Tanker, D.O.'s National Provider Identifier (NPI) is 1831137538, issued on Jun 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Tanker, D.O. located?
The NPPES record lists a practice address at 700 Cottman Ave, Philadelphia, PA, 19111. Phone: (215) 742-9900. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Tanker, D.O.'s license?
NPPES lists Pennsylvania license number OS004028L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark S. Tanker, D.O. prescribe under Medicare Part D?
In 2024, Mark S. Tanker, D.O. had 82 Medicare Part D claims for 30 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.