DR. HOLLY CATHERINE GILLIS MD
NPI 1609119015
Anesthesiology - Pediatric Anesthesiology in Milwaukee, WI
About Dr. Holly Catherine Gillis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HOLLY CATHERINE GILLIS MD (NPI 1609119015) is an individual pediatric anesthesiology provider in Milwaukee, Wisconsin, licensed in Wisconsin (87705-020) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with M Health Fairview University Of Mn, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses 4
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. Holly Catherine Gillis 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 Reassignments
8Medicare enrollment records show Holly Gillis reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cottage Grove, MN 55016
- Reassigned Medicare billing, Minnesota enrollment
- 2,361 clinicians in this Medicare group
Woodbury, MN 55125
- Reassigned Medicare billing, Minnesota enrollment
- 955 clinicians in this Medicare group
Maplewood, MN 55109
- Reassigned Medicare billing, Minnesota enrollment
- 1,178 clinicians in this Medicare group
Saint Paul, MN 55102
- Reassigned Medicare billing, Minnesota enrollment
- 671 clinicians in this Medicare group
Burnsville, MN 55337
- Reassigned Medicare billing, Minnesota enrollment
- 4,038 clinicians in this Medicare group
Minneapolis, MN 55455
- Reassigned Medicare billing, Minnesota enrollment
- 1,662 clinicians in this Medicare group
Minneapolis, MN 55454
- Reassigned Medicare billing, Minnesota enrollment
- 681 clinicians in this Medicare group
Columbus, OH 43205
- Reassigned Medicare billing, Ohio enrollment
- 188 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
M Health Fairview University Of Mn
Acute Care Hospitals · Minneapolis, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53226 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
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 Holly Gillis's NPI number?
The NPI number for Holly Gillis is 1609119015. It was assigned to this individual provider in the NPPES registry on April 3, 2013.
Where is Holly Gillis located?
Holly Gillis practices at 9200 W Wisconsin Ave, Milwaukee, WI 53226. The listed phone number is (414) 805-8700.
What is Holly Gillis's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Pediatric Anesthesiology, with taxonomy code 207LP3000X.
Is Holly Gillis enrolled in Medicare?
Yes. Holly Gillis 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 Holly Gillis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Holly Gillis reassigns Medicare benefits to 8 organizations: Healtheast Medical Research Institute (Cottage Grove, MN), Healtheast Woodwinds Hospital (Woodbury, MN), Healtheast St. John's Hospital (Maplewood, MN), Fairview Bethesda Hospital (Saint Paul, MN), Fairview Health Services (Burnsville, MN) and 3 more organizations, listed in the Medicare section above. 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 Holly Gillis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Holly Gillis accept?
Health plans from Anthem Blue Cross and Blue Shield, Antidote Health Plan of Ohio, Inc., CareSource (Common Ground Healthcare) and Medica list Holly Gillis 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 Holly Gillis affiliated with any hospitals?
According to CMS data, Holly Gillis is affiliated with M Health Fairview University Of Mn.
When was this NPI record last updated?
The NPPES record for Holly Gillis was last updated on October 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Holly Catherine Gillis, MD · NPI 1609119015
Pediatric Anesthesiology physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since April 3, 2013.
## Identity
- **NPI:** 1609119015 (Entity type: Individual)
- **Enumerated:** April 3, 2013
- **Primary specialty:** Anesthesiology - Pediatric Anesthesiology · taxonomy 207LP3000X
- **State license:** 87705-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 9200 W WISCONSIN AVE, Milwaukee, WI 53226-3522
- **Phone:** (414) 805-8700 · **Fax:** (414) 259-1522
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Healtheast Medical Research Institute (NPI 1801842729, Cottage Grove, MN); Healtheast Woodwinds Hospital (NPI 1356309322, Woodbury, MN); Healtheast St. John's Hospital (NPI 1447218482, Maplewood, MN); Fairview Bethesda Hospital (NPI 1194787465, Saint Paul, MN); Fairview Health Services (NPI 1225199128, Burnsville, MN); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** October 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1609119015) · Data from the CMS NPPES public registry.