Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Marshall R Posner, MD

Medical Oncology Physician in Palm Beach Gardens, FL · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1700847753

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Marshall R Posner

Credential MD

Sex Male

Practice address Palm Beach Gardens, FL, 33410

Phone (561) 253-3985

Fax (561) 253-3985

Enumeration date Mar 29, 2006

Last updated in NPPES May 5, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 258260 (FL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
042680	Other	-	TUFTS
2060930	Other	-	AETNA US HEALTHCARE
3040125	Other	-	UNITED HEALTH CARE
110152122	Other	-	RR MEDICARE DFCI
4395302	Other	-	CIGNA

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Marshall Posner practice?

The practice location on file with NPPES is in Palm Beach Gardens, FL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marshall Posner?

The National Provider Identifier (NPI) for Marshall Posner is 1700847753, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-05.