Gregory Conrad Stachelek, M.D., PH.D.
Radiation Oncology Physician · Darby, PA
Gregory Conrad Stachelek, M.D., PH.D. is a radiation oncology physician with a practice address in Darby, Pennsylvania, and NPI 1245687557, issued on May 17, 2016. Check the license (Pennsylvania MD475475, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Gregory Conrad Stachelek
- Credential
- M.D., PH.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD475475 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Lansdowne Ave, Darby, PA 19023
- Phone
- (610) 237-5070
- Enumerated
- May 17, 2016
- Record last updated
- May 20, 2023
- Medicare enrollment
- Enrolled (PECOS I20210923000902); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 383 in Pennsylvania → Look up another NPI →
Also registered at 1500 Lansdowne Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mubarak AbdallaStudent in an Organized Health Care Education/Training Program1568045425
- Abul Hasan Shadali Abdul KhaderStudent in an Organized Health Care Education/Training Program1356131676
- Aisha Abdul Sattar, MDHospitalist Physician1841872280
- Reshma Abey, MDStudent in an Organized Health Care Education/Training Program1164362992
- Maham AfzalStudent in an Organized Health Care Education/Training Program1831032945
- Joshika Agarwal, MDStudent in an Organized Health Care Education/Training Program1598469108
Verify Gregory Conrad Stachelek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD475475Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average radiation oncology physician in 2024
81 Medicare Part D claims for 23 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 17 claims were for opioids.
Most prescribed
- Tamsulosin Hcl25 claims
- Lidocaine Hcl Viscous15 claims
- Oxycodone Hcl11 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: $50.35
2 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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
- Trinity Health Mid-Atlantic Medical GroupLanghorne, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Conrad Stachelek among 383 radiation oncology physician records in Pennsylvania
Gregory Conrad Stachelek, M.D., PH.D. is one of 383 radiation oncology physician records with a practice address in Pennsylvania. 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 2016, is newer than 82% of them.
- NPI issued2016 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2016 · median 2004 among the 285 with a school on file
- Record last updated2023 · 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 2085R0001X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Pennsylvania
There are 383 radiation oncology physician records in Pennsylvania.
All 383 in Pennsylvania → Every provider in Darby → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Rachelle Lanciano, MDDrexel Hill, PA 190261114927365
- Deborah Markiewicz, MDDrexel Hill, PA 190261780684845
- Melvyn Richter, M.D.Elkins Park, PA 190271215209382
- John Lamond, MDUpland, PA 190131982697371
- Erik Assarsson, MDBryn Mawr, PA 190101306891338
- Richard Carella, MDBryn Mawr, PA 190101386683670
- John Antoniades, M.D.Haverford, PA 190411528398724
- Nicos Nicolaou, M.D.Bala Cynwyd, PA 190041619998085
Common questions
What is Gregory Conrad Stachelek, M.D., PH.D.'s NPI number?
Gregory Conrad Stachelek, M.D., PH.D.'s National Provider Identifier (NPI) is 1245687557, issued on May 17, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Conrad Stachelek, M.D., PH.D. located?
The NPPES record lists a practice address at 1500 Lansdowne Ave, Darby, PA, 19023. Phone: (610) 237-5070. Providers update this record themselves, so call before visiting.
How can I verify Gregory Conrad Stachelek, M.D., PH.D.'s license?
NPPES lists Pennsylvania license number MD475475, 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 Gregory Conrad Stachelek, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Gregory Conrad Stachelek, M.D., PH.D. had 81 Medicare Part D claims for 23 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.