GEON KIM MD
NPI 1710369640
Internal Medicine - Hematology in Boston, MA
About Geon Kim Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEON KIM MD (NPI 1710369640) is an individual hematology provider in Boston, Massachusetts, licensed in Massachusetts (273705) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
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
Geon Kim Md 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
3Medicare enrollment records show Geon Kim reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Geon Kim's NPI number?
The NPI number for Geon Kim is 1710369640. It was assigned to this individual provider in the NPPES registry on June 27, 2015.
Where is Geon Kim located?
Geon Kim practices at Massachusetts General Hospital 55 Fruit St., Boston, MA 02114. The listed phone number is (617) 726-7939.
What is Geon Kim's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.
Is Geon Kim enrolled in Medicare?
Yes. Geon Kim 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 Geon Kim's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Geon Kim reassigns Medicare benefits to 3 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization 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 Geon Kim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Geon Kim accept?
Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Geon Kim as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Geon Kim affiliated with any hospitals?
According to CMS data, Geon Kim is affiliated with Massachusetts General Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Geon Kim was last updated on October 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.
# Geon Kim, MD · NPI 1710369640
Hematology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 27, 2015.
## Identity
- **NPI:** 1710369640 (Entity type: Individual)
- **Enumerated:** June 27, 2015
- **Primary specialty:** Internal Medicine - Hematology · taxonomy 207RH0000X
- **State license:** 273705 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., Boston, MA 02114
- **Phone:** (617) 726-7939
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2015
## Record status
- **NPPES last updated:** October 6, 2026
- **Other identifiers:** Medicaid 3114345 (NH)
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Source: [NPI Profile](https://npiprofile.com/npi/1710369640) · Data from the CMS NPPES public registry.