ELIZABETH K MCMASTERS MD
NPI 1427067180
Psychiatry & Neurology - Psychiatry in Mchenry, IL
About Elizabeth K Mcmasters Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELIZABETH K MCMASTERS MD (NPI 1427067180) is an individual psychiatry provider in Mchenry, Illinois, licensed in Illinois (036-087029) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Mchenry, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
Other Identifiers 1
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
Elizabeth K Mcmasters 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 Reassignment
Medicare enrollment records show Elizabeth Mcmasters reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 1,664 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 4
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.
Northwestern Medicine Mchenry
Acute Care Hospitals · Mchenry, ILNorthwestern Medicine Central Dupage Hospital
Acute Care Hospitals · Winfield, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60050 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
MCHENRY, IL 60050
MCHENRY, IL 60050
MCHENRY, IL 60050
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 Elizabeth Mcmasters's NPI number?
The NPI number for Elizabeth Mcmasters is 1427067180. It was assigned to this individual provider in the NPPES registry on August 5, 2006.
Where is Elizabeth Mcmasters located?
Elizabeth Mcmasters practices at 4201 W Medical Center Dr, Mchenry, IL 60050. The listed phone number is (815) 338-6600.
What is Elizabeth Mcmasters's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Elizabeth Mcmasters enrolled in Medicare?
Yes. Elizabeth Mcmasters 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 Elizabeth Mcmasters's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Mcmasters reassigns Medicare benefits to Central Dupage Physician Group (Carol Stream, 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 Elizabeth Mcmasters's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Elizabeth Mcmasters accept?
Health plans from Oscar Health list Elizabeth Mcmasters 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 Elizabeth Mcmasters affiliated with any hospitals?
According to CMS data, Elizabeth Mcmasters is affiliated with Northwestern Medicine Mchenry and Northwestern Medicine Central Dupage Hospital.
When was this NPI record last updated?
The NPPES record for Elizabeth Mcmasters was last updated on January 28, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Elizabeth K Mcmasters, MD · NPI 1427067180
Psychiatry physician in Mchenry, Illinois. Individual provider, active in the CMS NPPES registry since August 5, 2006.
## Identity
- **NPI:** 1427067180 (Entity type: Individual)
- **Enumerated:** August 5, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 036-087029 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4201 W MEDICAL CENTER DR, Mchenry, IL 60050
- **Phone:** (815) 338-6600
## 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:** Central Dupage Physician Group (NPI 1033149844, Carol Stream, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 1992
## Record status
- **NPPES last updated:** January 28, 2019
- **Other identifiers:** Medicaid 036087029 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1427067180) · Data from the CMS NPPES public registry.