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Edit this profileAt a glance
- 55 Fruit Street, Yaw 7B Mass General Hospital, Boston, MA 02114
About John Clark
John R. Clark practices hematology & oncology in Boston, MA. The provider's National Provider Identifier (NPI) is 1871550244.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (617) 724-4000
- Email not available
Practice Locations
55 FRUIT STREET YAW 7B MASS GENERAL HOSPITAL
Boston, MA 02114
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other cancer specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 7 related providers in 1 group
Common questions
What does John R. Clark specialize in?
John R. Clark is a cancer specialist in Boston, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Hematology & Oncology”.
NPI registry
Where is John R. Clark located?
John R. Clark is listed at 55 Fruit Street Yaw 7B Mass General Hospital, Boston, MA 02114. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John R. Clark's phone number?
The number on file is (617) 724-4000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John R. Clark's NPI number?
John R. Clark's National Provider Identifier is 1871550244. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has John R. Clark been practicing?
John R. Clark has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has John R. Clark confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John R. Clark. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.