DR. KAREN L. WALLACE MD
NPI 1245463934
Radiology - Diagnostic Radiology in Cambridge, MA
About Dr. Karen L. Wallace Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KAREN L. WALLACE MD (NPI 1245463934) is an individual diagnostic radiology provider in Cambridge, Massachusetts, licensed in Massachusetts (240595) and active in the NPI registry since August 2009. She is enrolled in Medicare PECOS and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses
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. Karen L. Wallace 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
2Medicare enrollment records show Karen Wallace reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 336 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02138 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.
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
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 Karen Wallace's NPI number?
The NPI number for Karen Wallace is 1245463934. It was assigned to this individual provider in the NPPES registry on August 27, 2009.
Where is Karen Wallace located?
Karen Wallace practices at 330 Mount Auburn St Department Of Radiology, Cambridge, MA 02138. The listed phone number is (617) 499-5070.
What is Karen Wallace's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Karen Wallace enrolled in Medicare?
Yes. Karen Wallace 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 Karen Wallace's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Wallace reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Stockton, CA) and University Of California Sfgh Medical Group (San Francisco, CA). 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 Karen Wallace's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karen Wallace was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Karen L. Wallace, MD · NPI 1245463934
Diagnostic Radiology physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since August 27, 2009.
## Identity
- **NPI:** 1245463934 (Entity type: Individual)
- **Enumerated:** August 27, 2009
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 240595 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 MOUNT AUBURN ST, DEPARTMENT OF RADIOLOGY, Cambridge, MA 02138-5502
- **Phone:** (617) 499-5070
## 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): Permanente Medical Group Inc (NPI 1548343510, Stockton, CA); University Of California Sfgh Medical Group (NPI 1063487122, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** December 15, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1245463934) · Data from the CMS NPPES public registry.