WILLIAM CARTER KEIG MD
NPI 1598724643
Emergency Medicine in Fridley, MN
About William Carter Keig Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM CARTER KEIG MD (NPI 1598724643) is an individual emergency medicine provider in Fridley, Minnesota, licensed in Minnesota (32885) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with North Memorial Health Hospital, and is a graduate of University Of Kentucky College Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
William Carter Keig 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
4Medicare enrollment records show William Keig reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mora, MN 55051
- Reassigned Medicare billing, Minnesota enrollment
- 126 clinicians in this Medicare group
Grantsburg, WI 54840
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1356499784 (Wisconsin)
- 92 clinicians in this Medicare group
Hibbing, MN 55746
- Reassigned Medicare billing, Minnesota enrollment
- 707 clinicians in this Medicare group
Christiansted, St. Croix, VI 00821
- Reassigned Medicare billing, U.S. Virgin Islands enrollment
- 331 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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Memorial Health Hospital
Acute Care Hospitals · Robbinsdale, MNWelia Health
Critical Access Hospitals · Mora, MNGov Juan F Luis Hospital & Medical Ctr
Acute Care Hospitals · St Croix, VIBurnett Medical Center
Critical Access Hospitals · Grantsburg, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55432 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.
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 William Keig's NPI number?
The NPI number for William Keig is 1598724643. It was assigned to this individual provider in the NPPES registry on March 18, 2006.
Where is William Keig located?
William Keig practices at 550 Osborne Rd NE Unity Hospital, Fridley, MN 55432. The listed phone number is (763) 236-4144.
What is William Keig's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Keig enrolled in Medicare?
Yes. William Keig 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 William Keig's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Keig reassigns Medicare benefits to 4 organizations: Welia Health (Mora, MN), Burnett Medical Center Inc (Grantsburg, WI), Range Regional Health Services (Hibbing, MN) and Governor Juan F. Luis Hospital & Medical Center (Christiansted, St. Croix, VI). 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 William Keig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is William Keig affiliated with any hospitals?
According to CMS data, William Keig is affiliated with North Memorial Health Hospital, Welia Health, Gov Juan F Luis Hospital & Medical Ctr and Burnett Medical Center.
When was this NPI record last updated?
The NPPES record for William Keig was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# William Carter Keig, MD · NPI 1598724643
Emergency Medicine physician in Fridley, Minnesota. Individual provider, active in the CMS NPPES registry since March 18, 2006.
## Identity
- **NPI:** 1598724643 (Entity type: Individual)
- **Enumerated:** March 18, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 32885 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 OSBORNE RD NE, UNITY HOSPITAL, Fridley, MN 55432
- **Phone:** (763) 236-4144 · **Fax:** (763) 236-4900
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Welia Health (NPI 1528031390, Mora, MN); Burnett Medical Center Inc (NPI 1225191687, Grantsburg, WI); Range Regional Health Services (NPI 1356321699, Hibbing, MN); Governor Juan F. Luis Hospital & Medical Center (NPI 1972503647, Christiansted, St. Croix, VI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kentucky College Of Medicine, class of 1981
## Record status
- **NPPES last updated:** July 13, 2026
- **Other identifiers:** Other 32885
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Source: [NPI Profile](https://npiprofile.com/npi/1598724643) · Data from the CMS NPPES public registry.