KAITLIN ANN WILLHAM M.D.
NPI 1073891990
Internal Medicine in Evanston, IL
About Kaitlin Ann Willham M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAITLIN ANN WILLHAM M.D. (NPI 1073891990) is an individual internal medicine provider in Evanston, Illinois, licensed in Illinois (125059382) and active in the NPI registry since July 2011. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Kaitlin Ann Willham M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Kaitlin Willham reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 637 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60201 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.
EVANSTON, IL 60201
EVANSTON, IL 60201
EVANSTON, IL 60201
EVANSTON, IL 60201
EVANSTON, IL 60201
EVANSTON, IL 60201
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 Kaitlin Willham's NPI number?
The NPI number for Kaitlin Willham is 1073891990. It was assigned to this individual provider in the NPPES registry on July 26, 2011.
Where is Kaitlin Willham located?
Kaitlin Willham practices at 2650 Ridge Ave, Evanston, IL 60201. The listed phone number is (847) 570-2000.
What is Kaitlin Willham's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Kaitlin Willham enrolled in Medicare?
Yes. Kaitlin Willham is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Kaitlin Willham's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kaitlin Willham reassigns Medicare benefits to 4 organizations: University Of California Sfgh Medical Group (San Francisco, CA), Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). 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 Kaitlin Willham's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Kaitlin Willham was last updated on June 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Kaitlin Ann Willham, M.D. · NPI 1073891990
Internal Medicine physician in Evanston, Illinois. Individual provider, active in the CMS NPPES registry since July 26, 2011.
## Identity
- **NPI:** 1073891990 (Entity type: Individual)
- **Enumerated:** July 26, 2011
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 125059382 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 2650 RIDGE AVE, Evanston, IL 60201-1718
- **Phone:** (847) 570-2000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): University Of California Sfgh Medical Group (NPI 1265407381, San Francisco, CA); Regents Of The University Of California (NPI 1235322348, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 24, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1073891990) · Data from the CMS NPPES public registry.