DR. MARC B. GARNICK M.D.
NPI 1861429342
Internal Medicine - Hematology & Oncology in Boston, MA
About Dr. Marc B. Garnick M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARC B. GARNICK M.D. (NPI 1861429342) is an individual hematology & oncology provider in Boston, Massachusetts, licensed in Massachusetts (39022) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1972).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Marc B. Garnick M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Marc Garnick reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marc Garnick's NPI number?
The NPI number for Marc Garnick is 1861429342. It was assigned to this individual provider in the NPPES registry on June 28, 2006.
Where is Marc Garnick located?
Marc Garnick practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 667-5288.
What is Marc Garnick's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Marc Garnick enrolled in Medicare?
Yes. Marc Garnick is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Marc Garnick's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marc Garnick reassigns Medicare benefits to 2 organizations: Beth Israel Deaconess Medical Center, Inc. (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marc Garnick's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marc Garnick affiliated with any hospitals?
According to CMS data, Marc Garnick is affiliated with Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Marc Garnick was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Marc B. Garnick, M.D. · NPI 1861429342
Hematology & Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 28, 2006.
## Identity
- **NPI:** 1861429342 (Entity type: Individual)
- **Enumerated:** June 28, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 39022 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVE, Boston, MA 02215-5400
- **Phone:** (617) 667-5288 · **Fax:** (617) 975-5665
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 1972
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN A67041 (MA); Medicaid 0115622 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1861429342) · Data from the CMS NPPES public registry.