Physician Profile
Unclaimed ProfileAbout MAYER
Robert James Mayer, MD practices medical oncology in Boston, MA. Robert is a 1969 graduate of Harvard Medical School. Robert is also listed as specializing in internal medicine and hematology. Medicare claims data shows Robert provided 69 services to 35 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Mayer specialize in?
Dr. Mayer is a medical oncology in Boston, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “MEDICAL ONCOLOGY”.
NPI registry
Where is Dr. Mayer located?
Dr. Mayer is listed at 450 BROOKLINE AVE DANA FARBER CANCER INSTITUTE, D-1608, Boston, MA 02215. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Mayer's phone number?
The number on file is (617) 632-3474. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Mayer?
Dr. Mayer's National Provider Identifier is 1659361327. 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
Where did Dr. Mayer go to medical school?
Dr. Mayer attended Harvard Medical School, graduating in 1969. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mayer have?
Dr. Mayer has 57 years experience. Calculated from a graduation year of 1969, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Mayer do most often?
According to Medicare billing data, Dr. Mayer the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mayer's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mayer. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (617) 632-3474
- Email not available
Practice Locations
450 BROOKLINE AVE DANA FARBER CANCER INSTITUTE, D-1608
Boston, MA 02215
Procedures Most Often Billed to Medicare
69 services · 35 patients · 1 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
69 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other medical oncology specialists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 18 related providers in 3 groups
Other medical oncology specialists in Boston 5
Same specialty, same city.
Trained at Harvard Medical School 7
Other providers in the same specialty who trained at the same institution.
Class of 1969 at Harvard Medical School 6
Providers who graduated from the same medical school in the same year.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.