DR. KAREN BRENDA ALONSO M.D.
NPI 1033439328
Hospitalist in Phoenix, AZ
About Dr. Karen Brenda Alonso M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KAREN BRENDA ALONSO M.D. (NPI 1033439328) is an individual hospitalist provider in Phoenix, Arizona, licensed in Arizona (47925) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS and is a graduate of University Of South Florida College Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 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
Dr. Karen Brenda Alonso 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 Reassignments
3Medicare enrollment records show Karen Alonso reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Phoenix, AZ 85029
- Reassigned Medicare billing, Arizona enrollment
- 18 clinicians in this Medicare group
Mesa, AZ 85201
- Reassigned Medicare billing, Arizona enrollment
- 41 clinicians in this Medicare group
Gilbert, AZ 85234
- Reassigned Medicare billing, Arizona enrollment
- 1,081 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85029 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PHOENIX, AZ 85029
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 Alonso's NPI number?
The NPI number for Karen Alonso is 1033439328. It was assigned to this individual provider in the NPPES registry on June 9, 2010.
Where is Karen Alonso located?
Karen Alonso practices at 11022 N 28th Dr Ste 270, Phoenix, AZ 85029. The listed phone number is (623) 404-8505.
What is Karen Alonso's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Karen Alonso enrolled in Medicare?
Yes. Karen Alonso 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 Alonso's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Alonso reassigns Medicare benefits to 3 organizations: Wings Of Hope Medical Services, LLC (Phoenix, AZ), Lifeline Hospitalist Associates LLC (Mesa, AZ) and Banner Hospital Based Physicians Arizona LLC (Gilbert, AZ). 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 Alonso's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Alonso accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona and Imperial Insurance Companies, Inc. list Karen Alonso 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.
When was this NPI record last updated?
The NPPES record for Karen Alonso was last updated on September 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 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.
# Dr. Karen Brenda Alonso, M.D. · NPI 1033439328
Hospitalist physician in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since June 9, 2010.
## Identity
- **NPI:** 1033439328 (Entity type: Individual)
- **Enumerated:** June 9, 2010
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 47925 (Arizona)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11022 N 28TH DR STE 270, Phoenix, AZ 85029-5639
- **Phone:** (623) 404-8505
## 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): Wings Of Hope Medical Services, LLC (NPI 1003282278, Phoenix, AZ); Lifeline Hospitalist Associates LLC (NPI 1265107478, Mesa, AZ); Banner Hospital Based Physicians Arizona LLC (NPI 1124374822, Gilbert, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Florida College Of Medicine, class of 2010
## Record status
- **NPPES last updated:** September 18, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1033439328) · Data from the CMS NPPES public registry.