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GREGORY JACKSON AYCOCK CAA
NPI 1215924527
Anesthesiologist Assistant in Madison, WI

Active since October 03, 2005Accepts Medicare Assignment
600 HIGHLAND AVE, MADISON, WI 53792(608) 263-8100 Get Directions Write a Review

NPPES record last updated: June 5, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 5, 2026, Nov 21, 2024, May 10, 2024 and 1 more (4 updates tracked since 2023).

About Gregory Jackson Aycock Caa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY JACKSON AYCOCK CAA (NPI 1215924527) is an individual anesthesiologist assistant in Madison, Wisconsin, licensed in Wisconsin (618) and active in the NPI registry since October 2005. He is affiliated with Indiana University Health, maintains 3 additional practice locations, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1215924527
Entity TypeIndividualMale
Primary Taxonomy367H00000X
Provider Legal NameGREGORY JACKSON AYCOCKCredential: CAA
Location Address600 HIGHLAND AVEMadison, WI 53792-0001
Mailing Address7974 Uw Health CtMiddleton, WI 53562-5531
Phone(608) 263-8100
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateOctober 3, 2005
Last NPPES UpdateJune 5, 20264 updates tracked since enumeration
NPPES CertifiedJune 5, 2026
✔ NPI 1215924527 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367H00000X
Licenses✔ Licensed in WI · 618✔ Licensed in MO · PENDING✔ Licensed in IN · 75000176A
Definition
An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.
Also ListedPharmacistTaxonomy 183500000X · License PS40328 (FL), 17641 (NC)
600 HIGHLAND AVE, Madison, WI 53792
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1615 S New Ballas Rd Dept OfSaint Louis, MO 63141-8221 · Phone (636) 386-9224
Location 215 E New Haven AveMelbourne, FL 32901-4403 · Phone (321) 409-3941
Location 31701 N Senate BlvdIndianapolis, IN 46202-1239 · Phone (317) 274-0275 · Fax (317) 274-0256

Other Identifiers 1

Other1103727700IN · Anthem Ptan

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource, Cigna Healthcare and more.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

Gregory Jackson Aycock 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.

PECOS PAC ID547614059
PECOS Enrollment IDI20240604000162, I20260506001751

Medicare Billing Reassignments

3

Medicare enrollment records show Gregory Aycock reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Wisconsin Medical Foundation, Inc
5.0 mi
Multi-Specialty
7974 UW HEALTH COURT
Middleton, WI 53562
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,832 clinicians in this Medicare group
NPI 1598784555 (608) 829-5485
Iu Health Medical Group, LLC
283 mi
General Practice
1701 N SENATE BLVD
Indianapolis, IN 46202
  • Reassigned Medicare billing, Indiana enrollment
  • 5,212 clinicians in this Medicare group
NPI 1326893777 (317) 962-2000
Iu Anesthesiology Associates, LLC
284 mi
Anesthesiology
550 UNIVERSITY BLVD
Indianapolis, IN 46202
  • Reassigned Medicare billing, Indiana enrollment
  • 259 clinicians in this Medicare group
NPI 1285684407 (317) 274-0275

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 2

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.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
17 services17 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Indiana University Health

Acute Care Hospitals · Indianapolis, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150056
Location1701 N Senate BlvdIndianapolis, IN 46202 · Marion County
Emergency services Birthing friendly

University Of Wi Hospitals & Clinics Authority

Acute Care Hospitals · Madison, WI
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number520098
Location600 Highland AvenueMadison, WI 53792 · Dane County
Emergency services

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.

JASON ALAN CHRISTENSEN PHARMD
Pharmacist
600 HIGHLAND AVE, COMPLIANCE MAIL CODE 2433
MADISON, WI 53792
Dane County (608) 662-0817
LAURA JEAN KOPPLIN MD, PHD
Ophthalmology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-6070
HAGGI MAZEH MD
Surgery
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 265-8072
DR. SWAPNIL SUNIL LANJEWAR M.D.
Internal Medicine (Infectious Disease)
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-0946
DR. MATTHEW JAMES HOYT M.D.
Anesthesiology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8100
VANESSA MERCEDES WELTEN MD MPH
Transplant Surgery
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (617) 732-5500
JOHN HENRY NORMAN HARRISON
Anesthesiology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8100
PIPPA FROUKTE COSPER MD
Radiology (Radiation Oncology)
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8500

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 Gregory Aycock's NPI number?

The NPI number for Gregory Aycock is 1215924527. It was assigned to this individual provider in the NPPES registry on October 3, 2005.

Where is Gregory Aycock located?

Gregory Aycock practices at 600 Highland Ave, Madison, WI 53792. The listed phone number is (608) 263-8100.

What is Gregory Aycock's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Is Gregory Aycock enrolled in Medicare?

Yes. Gregory Aycock 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 Gregory Aycock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Aycock reassigns Medicare benefits to 3 organizations: University Of Wisconsin Medical Foundation, Inc (Middleton, WI), Iu Health Medical Group, LLC (Indianapolis, IN) and Iu Anesthesiology Associates, LLC (Indianapolis, IN). 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 Gregory Aycock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Aycock accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource, Cigna Healthcare and Group Health Cooperative-SCW list Gregory Aycock 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 Gregory Aycock affiliated with any hospitals?

According to CMS data, Gregory Aycock is affiliated with Indiana University Health and University Of Wi Hospitals & Clinics Authority.

When was this NPI record last updated?

The NPPES record for Gregory Aycock was last updated on June 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.