KATHERINE CALLAHAN GROMMERSCH CAA
NPI 1104341494
Anesthesiologist Assistant in Atlanta, GA
About Katherine Callahan Grommersch Caa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE CALLAHAN GROMMERSCH CAA (NPI 1104341494) is an individual anesthesiologist assistant in Atlanta, Georgia and active in the NPI registry since August 2017. She is affiliated with Orlando Health, maintains a secondary practice location in Orlando, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
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
Katherine Callahan Grommersch Caa 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
2Medicare enrollment records show Katherine Grommersch reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Atlanta, GA 30309
- Reassigned Medicare billing, Georgia enrollment
- 441 clinicians in this Medicare group
Orange City, FL 32763
- Reassigned Medicare billing, Florida enrollment
- 530 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
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Orlando Health
Acute Care Hospitals · Orlando, FLOrlando Health-Health Central Hospital
Acute Care Hospitals · Ocoee, FLOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ATLANTA, GA 30309
ATLANTA, GA 30309
ATLANTA, GA 30309
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 Katherine Grommersch's NPI number?
The NPI number for Katherine Grommersch is 1104341494. It was assigned to this individual provider in the NPPES registry on August 7, 2017. The provider is also known as Anna Katherine Callahan Caa.
Where is Katherine Grommersch located?
Katherine Grommersch practices at 1968 Peachtree Rd NW, Atlanta, GA 30309. The listed phone number is (770) 880-2812.
What is Katherine Grommersch's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is Katherine Grommersch enrolled in Medicare?
Yes. Katherine Grommersch 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 Katherine Grommersch's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Grommersch reassigns Medicare benefits to 2 organizations: Piedmont Anesthesia Associates, L.L.C (Atlanta, GA) and Anesthesiologists Of Greater Orlando Inc (Orange City, FL). 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 Katherine Grommersch's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Katherine Grommersch affiliated with any hospitals?
According to CMS data, Katherine Grommersch is affiliated with Orlando Health and Orlando Health-Health Central Hospital.
When was this NPI record last updated?
The NPPES record for Katherine Grommersch was last updated on December 14, 2021. 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.
# Katherine Callahan Grommersch, CAA · NPI 1104341494
Anesthesiologist Assistant physician in Atlanta, Georgia. Individual provider, active in the CMS NPPES registry since August 7, 2017.
## Identity
- **NPI:** 1104341494 (Entity type: Individual)
- **Enumerated:** August 7, 2017
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **Sole proprietor:** No
## Practice location
- **Address:** 1968 PEACHTREE RD NW, Atlanta, GA 30309-1281
- **Phone:** (770) 880-2812
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Piedmont Anesthesia Associates, L.L.C (NPI 1407856594, Atlanta, GA); Anesthesiologists Of Greater Orlando Inc (NPI 1457300998, Orange City, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** December 14, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1104341494) · Data from the CMS NPPES public registry.