Anthony Christopher Stack, DO
Medical Oncology Physician · Philadelphia, PA
Anthony Christopher Stack, DO is a medical oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1912491663, issued on Jun 17, 2018. Check the license (Pennsylvania OS020804, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Anthony Christopher Stack
- Credential
- DO
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- OS020804 PA
OT018719 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3401 N Broad St, Philadelphia, PA 19140
- Phone
- (215) 707-2000
- Enumerated
- Jun 17, 2018
- Record last updated
- Nov 5, 2025
- Medicare enrollment
- Enrolled (PECOS I20210628000012); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2018
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 265 in Pennsylvania → Look up another NPI →
Also registered at 3401 N Broad St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Asia Abdul-Haqq, CNMAdvanced Practice Midwife1588679161
Verify Anthony Christopher Stack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS020804Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average medical oncology physician in 2024
163 Medicare Part D claims for 46 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Acyclovir15 claims
- Pantoprazole Sodium13 claims
- Allopurinol11 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: $315.78
6 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- Temple Faculty Practice Plan IncPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anthony Christopher Stack among 265 medical oncology physician records in Pennsylvania
Anthony Christopher Stack, DO is one of 265 medical oncology physician records with a practice address in Pennsylvania. 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 2018, is newer than 92% of them.
- NPI issued2018 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2018 · median 2002 among the 189 with a school on file
- Record last updated2025 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Pennsylvania
There are 265 medical oncology physician records in Pennsylvania.
All 265 in Pennsylvania → Every provider in Philadelphia → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Joyce Habib, M.D.Philadelphia, PA 191401881824886
- Jean-Pierre Issa, M.D.Philadelphia, PA 191401922168475
- Marcus MessmerPhiladelphia, PA 191401285070490
- Juhi Mittal, MDPhiladelphia, PA 191401336308527
- Aruna Padmanabhan, MDPhiladelphia, PA 191401619159373
- Alvaro Pereira-Rico, M.D.Philadelphia, PA 191401639198880
- Alexander Gaitanis, D.O.Philadelphia, PA 191411114937844
- Gabor Varadi, MDPhiladelphia, PA 191411780894352
Common questions
What is Anthony Christopher Stack, DO's NPI number?
Anthony Christopher Stack, DO's National Provider Identifier (NPI) is 1912491663, issued on Jun 17, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Anthony Christopher Stack, DO located?
The NPPES record lists a practice address at 3401 N Broad St, Philadelphia, PA, 19140. Phone: (215) 707-2000. Providers update this record themselves, so call before visiting.
How can I verify Anthony Christopher Stack, DO's license?
NPPES lists Pennsylvania license number OS020804, 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 Anthony Christopher Stack, DO prescribe under Medicare Part D?
In 2024, Anthony Christopher Stack, DO had 163 Medicare Part D claims for 46 beneficiaries; the average among medical oncology physician prescribers was 703. 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.