MR. CHRISTOPHER MILLS NP
NPI 1851833644
Nurse Practitioner - Acute Care in Elgin, IL
About Mr. Christopher Mills Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. CHRISTOPHER MILLS NP (NPI 1851833644) is an individual acute care provider in Elgin, Illinois, licensed in Illinois (209015034) and active in the NPI registry since November 2016. He is enrolled in Medicare PECOS, is affiliated with Advocate Sherman Hospital, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
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
Mr. Christopher Mills Np 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 Reassignment
Medicare enrollment records show Christopher Mills reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sycamore, IL 60178
- Reassigned Medicare billing, Illinois enrollment
- 24 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 7
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.
Advocate Sherman Hospital
Acute Care Hospitals · Elgin, ILPresence Saint Joseph Hospital - Elgin
Acute Care Hospitals · Elgin, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60123 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ELGIN, IL 60123
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 Christopher Mills's NPI number?
The NPI number for Christopher Mills is 1851833644. It was assigned to this individual provider in the NPPES registry on November 9, 2016.
Where is Christopher Mills located?
Christopher Mills practices at 1990 Larkin Ave Ste 3, Elgin, IL 60123. The listed phone number is (847) 289-5727.
What is Christopher Mills's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Christopher Mills enrolled in Medicare?
Yes. Christopher Mills 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 organization bills Medicare for Christopher Mills's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Mills reassigns Medicare benefits to Sycamore Medical Associates LLC (Sycamore, IL). The 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 Christopher Mills's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Christopher Mills accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Christopher Mills 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 Christopher Mills affiliated with any hospitals?
According to CMS data, Christopher Mills is affiliated with Advocate Sherman Hospital and Presence Saint Joseph Hospital - Elgin.
When was this NPI record last updated?
The NPPES record for Christopher Mills was last updated on November 12, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Mr. Christopher Mills, NP · NPI 1851833644
Acute Care physician in Elgin, Illinois. Individual provider, active in the CMS NPPES registry since November 9, 2016.
## Identity
- **NPI:** 1851833644 (Entity type: Individual)
- **Enumerated:** November 9, 2016
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 209015034 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1990 LARKIN AVE STE 3, Elgin, IL 60123-5827
- **Phone:** (847) 289-5727
## 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:** Sycamore Medical Associates LLC (NPI 1770916777, Sycamore, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** November 12, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1851833644) · Data from the CMS NPPES public registry.