ALEXANDER GEORGE EMERSON MD
NPI 1699208421
Allergy & Immunology in Louisville, KY
About Alexander George Emerson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER GEORGE EMERSON MD (NPI 1699208421) is an individual allergy & immunology provider in Louisville, Kentucky, licensed in Kentucky (60954) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with Baptist Health Floyd, and is a graduate of Louisville Medical College (2019).
NPPES Registry Identity
Specialties & Licenses 3
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
Alexander George Emerson 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 Reassignment
Medicare enrollment records show Alexander Emerson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Louisville, KY 40220
- Reassigned Medicare billing, Indiana and Kentucky enrollments
- 34 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baptist Health Floyd
Acute Care Hospitals · New Albany, INBaptist Health Louisville
Acute Care Hospitals · Louisville, KYOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOUISVILLE, KY 40220
LOUISVILLE, KY 40220
LOUISVILLE, KY 40220
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 Alexander Emerson's NPI number?
The NPI number for Alexander Emerson is 1699208421. It was assigned to this individual provider in the NPPES registry on April 8, 2017.
Where is Alexander Emerson located?
Alexander Emerson practices at 2944 Breckenridge Ln, Louisville, KY 40220. The listed phone number is (502) 995-5525.
What is Alexander Emerson's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Alexander Emerson enrolled in Medicare?
Yes. Alexander Emerson 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 Alexander Emerson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Emerson reassigns Medicare benefits to Advanced Ent And Allergy PLLC (Louisville, KY). 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 Alexander Emerson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alexander Emerson accept?
Health plans from Anthem Blue Cross and Blue Shield, CareSource and Oscar Insurance Company list Alexander Emerson 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 Alexander Emerson affiliated with any hospitals?
According to CMS data, Alexander Emerson is affiliated with Baptist Health Floyd and Baptist Health Louisville.
When was this NPI record last updated?
The NPPES record for Alexander Emerson was last updated on January 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.
# Alexander George Emerson, MD · NPI 1699208421
Allergy & Immunology physician in Louisville, Kentucky. Individual provider, active in the CMS NPPES registry since April 8, 2017.
## Identity
- **NPI:** 1699208421 (Entity type: Individual)
- **Enumerated:** April 8, 2017
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 60954 (Kentucky)
- **Sole proprietor:** No
## Practice location
- **Address:** 2944 BRECKENRIDGE LN, Louisville, KY 40220-1409
- **Phone:** (502) 995-5525 · **Fax:** (502) 280-1419
## 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:** Advanced Ent And Allergy PLLC (NPI 1780817502, Louisville, KY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Louisville Medical College, class of 2019
## Record status
- **NPPES last updated:** January 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1699208421) · Data from the CMS NPPES public registry.