Dan L. Longo, M.D.
Medical Oncology Physician · Brookline, MA
Dan L. Longo, M.D. is a medical oncology physician with a practice address in Brookline, Massachusetts, and NPI 1790842664, issued on Jan 2, 2007. Check the license on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Dan L. Longo
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- D0020564 MD
Self-reported in NPPES; status is on the state search - Practice location
- 111 Cypress St, Brookline, MA 02445
- Phone
- (857) 307-0896
- Enumerated
- Jan 2, 2007
- Record last updated
- Jun 14, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 421 in Massachusetts → Look up another NPI →
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Verify Dan L. Longo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Dan L. Longo among 421 medical oncology physician records in Massachusetts
Dan L. Longo, M.D. is one of 421 medical oncology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 49% newer
- In a Medicare fileNo · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2012 · 51% 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 Massachusetts 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 Massachusetts
There are 421 medical oncology physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 421 in Massachusetts → Every provider in Brookline → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Elgene Lim, M.D.Boston, MA 024461073817524
- Melody Craft, M.D.Waltham, MA 024511124218268
- James O'Leary, M.D.Waltham, MA 024511336371012
- Mark Huberman, MDNewton, MA 024591477583441
- Caroline Block, MDNewton, MA 024621851368633
- Barbara Healey, M.DNewton, MA 024621841254679
- Robert Tepper, M.D.Weston, MA 024931720101629
- James Koomey, M.D.Plymouth, MA 023601477531358
Common questions
What is Dan L. Longo, M.D.'s NPI number?
Dan L. Longo, M.D.'s National Provider Identifier (NPI) is 1790842664, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Dan L. Longo, M.D. located?
The NPPES record lists a practice address at 111 Cypress St, Brookline, MA, 02445. Phone: (857) 307-0896. Providers update this record themselves, so call before visiting.
How can I verify Dan L. Longo, M.D.'s license?
Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.