Marshall R. Posner, MD
Medical Oncology Physician · Palm Beach Gardens, FL
Marshall R. Posner, MD is a medical oncology physician with a practice address in Palm Beach Gardens, Florida, and NPI 1700847753, issued on Mar 29, 2006. Check the license (Florida 258260, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Marshall R. Posner
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 258260 FL
Self-reported in NPPES; status is on the state search - Practice location
- 11621 Kew Gardens Ave Ste 101A, Palm Beach Gardens, FL 33410
- Phone
- (561) 253-3985
- Enumerated
- Mar 29, 2006
- Record last updated
- May 5, 2026
- Fax
- (561) 253-3985
- Medicare enrollment
- Enrolled (PECOS I20240823001835); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1975
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 561 in Florida → Look up another NPI →
Also registered at 11621 Kew Gardens Ave Ste 101A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sanjay Awasthi, M.D.Medical Oncology Physician1518904077
- Samantha AxelrodPharmacist1770410508
- Erin Bialousz, PAPhysician Assistant1811529977
- Anna Karenina Cammilleri, PA-CPhysician Assistant1396280731
- Kimmerle Cohen, M.D.Surgery Physician1902921067
- Brigett Muller, PA-CPhysician Assistant1326441767
Verify Marshall R. Posner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license 258260Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average medical oncology physician in 2024
151 Medicare Part D claims for 30 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium76 claims
- Ondansetron Odt11 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: $13,931.01
16 payments; by number, the most common kind was consulting fee; the largest payer was Merck Sharp & Dohme LLC. 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
- Cancer Center OF South Florida PLLCPalm Springs, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marshall R. Posner among 561 medical oncology physician records in Florida
Marshall R. Posner, MD is one of 561 medical oncology physician records with a practice address in Florida. 91% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 46% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated1975 · median 2000 among the 463 with a school on file
- Record last updated2026 · 24% 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 Florida 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 Florida
There are 561 medical oncology physician records in Florida.
All 561 in Florida → Every provider in Palm Beach Gardens → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Sanjay Awasthi, M.D.Palm Beach Gardens, FL 334101518904077
- Judah Friedman, M.D.Palm Beach Gardens, FL 334101134241284
- Elisabeth McKeen, M.D.Palm Beach Gardens, FL 334101407852585
- Rina Patel, M.D.Palm Beach Gardens, FL 334101407086127
- Sumithra Vattigunta, MDPalm Beach Gardens, FL 334101598785966
- Allen Schultz, D.O.West Palm Beach, FL 334071164535936
- Todd Gersten, M.D.Wellington, FL 334141962408047
- Thanuja Neerukonda, MDWellington, FL 334141912535998
Common questions
What is Marshall R. Posner, MD's NPI number?
Marshall R. Posner, MD's National Provider Identifier (NPI) is 1700847753, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marshall R. Posner, MD located?
The NPPES record lists a practice address at 11621 Kew Gardens Ave Ste 101A, Palm Beach Gardens, FL, 33410. Phone: (561) 253-3985. Providers update this record themselves, so call before visiting.
How can I verify Marshall R. Posner, MD's license?
NPPES lists Florida license number 258260, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marshall R. Posner, MD prescribe under Medicare Part D?
In 2024, Marshall R. Posner, MD had 151 Medicare Part D claims for 30 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.