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

Dr. Robert Joseph Markelewicz Jr., M.D.

Nuclear Imaging & Therapy Physician in Wellesley, MA · enumerated 2008.

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

National Provider Identifier

1033364336

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Robert Joseph Markelewicz Jr.

Credential M.D.

Sex Male

Practice address Wellesley, MA, 02481

Phone (401) 316-3166

Enumeration date Dec 1, 2008

Last updated in NPPES Jun 8, 2026

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

Taxonomy & licenses

207UN0902X Nuclear Imaging & Therapy Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Primary

207U00000X Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

207UN0903X In Vivo & In Vitro Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

2085R0203X Therapeutic Radiology Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

207UN0901X Nuclear Cardiology Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 238256 (MA) Secondary

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

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

What is the NPI number for Robert Markelewicz?

The National Provider Identifier (NPI) for Robert Markelewicz is 1033364336, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Markelewicz practice?

The practice location on file with NPPES is in Wellesley, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-08.