DR. WILLIAM MILLER MD
NPI 1275623308
Anesthesiology in Park Ridge, IL
About Dr. William Miller Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM MILLER MD (NPI 1275623308) is an individual anesthesiology provider in Park Ridge, Illinois and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1978).
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 and accepts Medicare assignment
Dr. William Miller 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
2Medicare enrollment records show William Miller reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rosemont, IL 60018
- Reassigned Medicare billing, Illinois enrollment
- 51 clinicians in this Medicare group
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- 385 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.
Other Providers at the Same Location NPPES 18
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 Miller's NPI number?
The NPI number for William Miller is 1275623308. It was assigned to this individual provider in the NPPES registry on October 12, 2006.
Where is William Miller located?
William Miller practices at 1775 W. Dempster, Park Ridge, IL 60068. The listed phone number is (847) 723-2210.
What is William Miller's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Miller enrolled in Medicare?
Yes. William Miller 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 Miller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Miller reassigns Medicare benefits to 2 organizations: Mobile Anesthesiologists Chicago LLC (Rosemont, IL) and Midwest Anesthesia Partners, LLC (Chicago, IL). 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 Miller'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 William Miller was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dr. William Miller, MD · NPI 1275623308
Anesthesiology physician in Park Ridge, Illinois. Individual provider, active in the CMS NPPES registry since October 12, 2006.
## Identity
- **NPI:** 1275623308 (Entity type: Individual)
- **Enumerated:** October 12, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **Sole proprietor:** No
## Practice location
- **Address:** 1775 W. DEMPSTER, Park Ridge, IL 60068
- **Phone:** (847) 723-2210
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mobile Anesthesiologists Chicago LLC (NPI 1396887774, Rosemont, IL); Midwest Anesthesia Partners, LLC (NPI 1255380184, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 1978
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1275623308) · Data from the CMS NPPES public registry.