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

Robert Waters Ross, MD

Medical Oncology Physician in Boston, MA · enumerated 2006.

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

National Provider Identifier

1659348043

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Registry record

Entity type Individual (Type 1)

Name Robert Waters Ross

Credential MD

Sex Male

Practice address Boston, MA, 02115

Phone (617) 632-3237

Enumeration date Mar 3, 2006

Last updated in NPPES Aug 15, 2007

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 216832 (MA) 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
J28701	Other	MA	MASSACHUSETTS BLUE CROSS
0117126	Other	-	CIGNA
213832	Other	-	TUFTS
AA38911	Other	-	HPHC DFCI ONLY
2104261	Medicaid	MA	-

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.

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Frequently asked questions

Is NPI 1659348043 active?

Yes, as of the latest NPPES snapshot, NPI 1659348043 is active (record last updated 2007-08-15).

How do I verify Robert Ross's NPI record?

Cross-check NPI 1659348043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Shelley Mccormick Genetic Counselor (M.S.) · Boston, MA NPI 1447224613 Iris Chan Medical Oncology Physician · Boston, MA NPI 1396712105 Arnold Freedman Medical Oncology Physician · Boston, MA NPI 1245207828 David Fisher Medical Oncology Physician · Boston, MA NPI 1598732752 Richard Stone Hematology & Oncology Physician · Boston, MA NPI 1528036894 Kimberly Stegmaier Pediatric Hematology & Oncology Physician · Boston, MA NPI 1801864202 Sung Yun Pai Pediatric Hematology & Oncology Physician · Boston, MA NPI 1497723647 Catherine Wu Hematology & Oncology Physician · Boston, MA NPI 1710946140

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-15.