STEPHEN HOWARD KARSHBAUM MD
NPI 1124032271
Radiology - Diagnostic Radiology in Peabody, MA
About Stephen Howard Karshbaum Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN HOWARD KARSHBAUM MD (NPI 1124032271) is an individual diagnostic radiology provider in Peabody, Massachusetts, licensed in Massachusetts (78711) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with St Elizabeth's Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 2
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
Stephen Howard Karshbaum 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
8Medicare enrollment records show Stephen Karshbaum reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Peabody, MA 01960
- Reassigned Medicare billing, Massachusetts enrollment
- 73 clinicians in this Medicare group
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 716 clinicians in this Medicare group
Brighton, MA 02135
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1821349317 (Massachusetts)
- 130 clinicians in this Medicare group
Roxbury Crossing, MA 02120
- Reassigned Medicare billing, Massachusetts enrollment
- 13 clinicians in this Medicare group
Lowell, MA 01854
- Reassigned Medicare billing, Massachusetts enrollment
- 42 clinicians in this Medicare group
Dedham, MA 02026
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Chelmsford Mri PC
- Also billed through NPI 1821435553 (Massachusetts)
- 82 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 28 clinicians in this Medicare group
Portsmouth, NH 03801
- Reassigned Medicare billing, New Hampshire enrollment
- 22 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 30
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.
St Elizabeth's Medical Center
Acute Care Hospitals · Brighton, MAGood Samaritan Medical Center
Acute Care Hospitals · Brockton, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01960 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.
PEABODY, MA 01960
PEABODY, MA 01960
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 Stephen Karshbaum's NPI number?
The NPI number for Stephen Karshbaum is 1124032271. It was assigned to this individual provider in the NPPES registry on July 27, 2006.
Where is Stephen Karshbaum located?
Stephen Karshbaum practices at 1 Orthopedic Dr, Peabody, MA 01960. The listed phone number is (978) 818-6272.
What is Stephen Karshbaum's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Stephen Karshbaum enrolled in Medicare?
Yes. Stephen Karshbaum 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 Stephen Karshbaum's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Karshbaum reassigns Medicare benefits to 8 organizations: Sports Medicine North Orthopaedic Surgery, Inc. (Peabody, MA), Bmc Affiliated Physicians, Inc. (Boston, MA), Steward Medical Group, Inc (Brighton, MA), Neb Radiology PC (Roxbury Crossing, MA), Orthopaedic Surgical Associates Of Lowell, P.C. (Lowell, MA) and 3 more organizations, listed in the Medicare section above. 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 Stephen Karshbaum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Karshbaum accept?
Health plans from Ambetter from NH Healthy Families, Taro Health and WellSense Health Plan list Stephen Karshbaum 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 Stephen Karshbaum affiliated with any hospitals?
According to CMS data, Stephen Karshbaum is affiliated with St Elizabeth's Medical Center and Good Samaritan Medical Center.
When was this NPI record last updated?
The NPPES record for Stephen Karshbaum was last updated on August 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.