GRANT ERICH BERQUIST
NPI 1083311393
Nurse Practitioner - Acute Care in Oak Lawn, IL
About Grant Erich Berquist NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRANT ERICH BERQUIST (NPI 1083311393) is an individual acute care provider in Oak Lawn, Illinois, licensed in Illinois (209.026753) and active in the NPI registry since February 2023. He is enrolled in Medicare PECOS, is affiliated with Advocate Christ Hospital & Medical Center, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2022).
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
Grant Erich Berquist 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 Grant Berquist reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oak Lawn, IL 60453
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Advocate Health And Hospitals Corporation
- Also billed through NPI 1629441027 (Illinois)
- 4,870 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
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60453 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.
OAK LAWN, IL 60453
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 Grant Berquist's NPI number?
The NPI number for Grant Berquist is 1083311393. It was assigned to this individual provider in the NPPES registry on February 8, 2023.
Where is Grant Berquist located?
Grant Berquist practices at 4440 W 95th St, Oak Lawn, IL 60453. The listed phone number is (708) 684-8000.
What is Grant Berquist's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Grant Berquist enrolled in Medicare?
Yes. Grant Berquist 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 Grant Berquist's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grant Berquist reassigns Medicare benefits to Advocate Health & Hospitals Corporation (Oak Lawn, 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 Grant Berquist's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Grant Berquist affiliated with any hospitals?
According to CMS data, Grant Berquist is affiliated with Advocate Christ Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Grant Berquist was last updated on November 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.
# Grant Erich Berquist · NPI 1083311393
Acute Care physician in Oak Lawn, Illinois. Individual provider, active in the CMS NPPES registry since February 8, 2023.
## Identity
- **NPI:** 1083311393 (Entity type: Individual)
- **Enumerated:** February 8, 2023
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 209.026753 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4440 W 95TH ST, Oak Lawn, IL 60453-2600
- **Phone:** (708) 684-8000
## 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:** Advocate Health & Hospitals Corporation (NPI 1912936014, Oak Lawn, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** November 12, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1083311393) · Data from the CMS NPPES public registry.