MS. KAREN MARIE ALEXANDER M.D.
NPI 1891949863
Radiology - Diagnostic Radiology in Boston, MA
About Ms. Karen Marie Alexander M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. KAREN MARIE ALEXANDER M.D. (NPI 1891949863) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (291899) and active in the NPI registry since November 2008. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins All Children's Hospital, and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (2015).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Ms. Karen Marie Alexander 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 Reassignment
Medicare enrollment records show Karen Alexander reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
St Petersburg, FL 33701
- Reassigned Medicare billing, Florida enrollment
- 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins All Children's Hospital
Childrens · Saint Petersburg, FLPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 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 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Alexander's NPI number?
The NPI number for Karen Alexander is 1891949863. It was assigned to this individual provider in the NPPES registry on November 4, 2008. The provider is also known as Karen Marie Fuqua M.D..
Where is Karen Alexander located?
Karen Alexander practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Karen Alexander's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Karen Alexander enrolled in Medicare?
Yes. Karen Alexander 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 organization bills Medicare for Karen Alexander's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Alexander reassigns Medicare benefits to Pediatric Physician Services, Inc. (St Petersburg, FL). The 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 Alexander's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Alexander accept?
Health plans from Cigna HealthCare of Florida, Inc. and Cigna Healthcare list Karen Alexander 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 Karen Alexander affiliated with any hospitals?
According to CMS data, Karen Alexander is affiliated with Johns Hopkins All Children's Hospital.
When was this NPI record last updated?
The NPPES record for Karen Alexander was last updated on June 15, 2022. 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.
# Ms. Karen Marie Alexander, M.D. · NPI 1891949863
Diagnostic Radiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since November 4, 2008.
## Identity
- **NPI:** 1891949863 (Entity type: Individual)
- **Enumerated:** November 4, 2008
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 291899 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5724
- **Phone:** (617) 355-6000
## 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:** Pediatric Physician Services, Inc. (NPI 1770532798, St Petersburg, FL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kansas School Of Med, class of 2015
## Record status
- **NPPES last updated:** June 15, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1891949863) · Data from the CMS NPPES public registry.