Karen Wallace, MD
NPI 1245463934 · Diagnostic Radiology Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Wallace, MD is a Diagnostic Radiology Physician provider in Cambridge, MA (NPI 1245463934).
Provider details
- NPI number
- 1245463934
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 240595 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
89 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 49 | $9 |
| Screening Mammography77067 | 22 | $87 |
| Ct Scan Head Or Brain Without Contrast70450 | 18 | $45 |
Typical Medicare-allowed amounts for these services range $9–$87 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-08-27
- Last updated
- 2021-12-15
Frequently asked questions
- What is Karen Wallace's NPI number?
- Karen Wallace's National Provider Identifier (NPI) is 1245463934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Wallace's specialty?
- Karen Wallace is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Wallace located?
- Karen Wallace's practice location on file with NPPES is 330 Mount Auburn St, Cambridge, MA 02138-5502.
- What is Karen Wallace's phone number?
- The practice phone number listed in the NPPES registry for Karen Wallace is (617) 499-5070.
- Does Karen Wallace accept Medicare?
- Karen Wallace is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Wallace's NPI active?
- Yes — Karen Wallace's NPI (1245463934) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.