ALEXANDRA MILLS M.D.
NPI 1083146351
Internal Medicine - Infectious Disease in Charleston, SC
About Alexandra Mills M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDRA MILLS M.D. (NPI 1083146351) is an individual infectious disease provider in Charleston, South Carolina, licensed in South Carolina (87496) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, is affiliated with Musc Medical Center, and maintains a secondary practice location in New York.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Alexandra Mills 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 Alexandra Mills reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Charleston, SC 29425
- Reassigned Medicare billing, South Carolina enrollment
- 2,594 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 5
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Musc Medical Center
Acute Care Hospitals · Charleston, SCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29425 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHARLESTON, SC 29425
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 Alexandra Mills's NPI number?
The NPI number for Alexandra Mills is 1083146351. It was assigned to this individual provider in the NPPES registry on March 28, 2017.
Where is Alexandra Mills located?
Alexandra Mills practices at 171 Ashley Ave, Charleston, SC 29425. The listed phone number is (843) 792-1414.
What is Alexandra Mills's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Alexandra Mills enrolled in Medicare?
Yes. Alexandra Mills 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 Alexandra Mills's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Mills reassigns Medicare benefits to University Medical Associates Of The Medical University Of South Carol (Charleston, SC). 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 Alexandra Mills's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alexandra Mills accept?
Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, BlueCross BlueShield of South Carolina and First Choice Next and 1 other insurer list Alexandra Mills 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 Alexandra Mills affiliated with any hospitals?
According to CMS data, Alexandra Mills is affiliated with Musc Medical Center.
When was this NPI record last updated?
The NPPES record for Alexandra Mills was last updated on August 2, 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.
# Alexandra Mills, M.D. · NPI 1083146351
Infectious Disease physician in Charleston, South Carolina. Individual provider, active in the CMS NPPES registry since March 28, 2017.
## Identity
- **NPI:** 1083146351 (Entity type: Individual)
- **Enumerated:** March 28, 2017
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 87496 (South Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 171 ASHLEY AVE, Charleston, SC 29425-5204
- **Phone:** (843) 792-1414
## 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:** University Medical Associates Of The Medical University Of South Carol (NPI 1013934629, Charleston, SC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** August 2, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1083146351) · Data from the CMS NPPES public registry.