What is J. Hamilton's NPI number?

J. Hamilton's National Provider Identifier (NPI) is 1649386129, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is J. Hamilton's specialty?

J. Hamilton is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).

Where is J. Hamilton located?

J. Hamilton's practice location on file with NPPES is National Cancer Institute, Bethesda, MD 20889-0001.

What is J. Hamilton's phone number?

The practice phone number listed in the NPPES registry for J. Hamilton is (301) 496-0901.

Is J. Hamilton's NPI active?

Yes — J. Hamilton's NPI (1649386129) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

J. Hamilton, M.D.

NPI 1649386129 · Hematology & Oncology Physician · Bethesda, MD

J. Hamilton, M.D. is a Hematology & Oncology Physician provider in Bethesda, MD (NPI 1649386129).

Provider details

NPI number: 1649386129
Entity type: Individual
Primary specialty: Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: D25893 (MD)

Specialties & taxonomies

Hematology & Oncology PhysicianPrimary207RH0003XLicense D25893 (MD)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(90/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

National Cancer Institute

Nnmc Bldg 8, Room 5101

Bethesda, MD 20889-0001

Phone: (301) 496-0901

Approximate (ZIP-level) locationGet directions

More MD providers

Mailing address

10518 Deneane Rd

Silver Spring, MD 20903-1202

Enumerated: 2006-08-21
Last updated: 2007-07-08

Frequently asked questions

What is J. Hamilton's NPI number?: J. Hamilton's National Provider Identifier (NPI) is 1649386129, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is J. Hamilton's specialty?: J. Hamilton is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
Where is J. Hamilton located?: J. Hamilton's practice location on file with NPPES is National Cancer Institute, Bethesda, MD 20889-0001.
What is J. Hamilton's phone number?: The practice phone number listed in the NPPES registry for J. Hamilton is (301) 496-0901.
Is J. Hamilton's NPI active?: Yes — J. Hamilton's NPI (1649386129) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.