ROSS EUGENE LARSON MD
NPI 1992326284
Hospitalist in Evanston, IL
About Ross Eugene Larson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROSS EUGENE LARSON MD (NPI 1992326284) is an individual hospitalist provider in Evanston, Illinois, licensed in Illinois (036166063) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains a secondary practice location in Evanston.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Ross Eugene Larson 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 Ross Larson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 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.
Northshore University Healthsystem - Evanston Hospital
Acute Care Hospitals · Evanston, ILPhysician 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.
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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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
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 Ross Larson's NPI number?
The NPI number for Ross Larson is 1992326284. It was assigned to this individual provider in the NPPES registry on April 28, 2020.
Where is Ross Larson located?
Ross Larson practices at 2650 Ridge Ave. Im/Icu Hospitalists, Evanston, IL 60201. The listed phone number is (847) 570-1010.
What is Ross Larson's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Ross Larson enrolled in Medicare?
Yes. Ross Larson 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 Ross Larson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ross Larson reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, 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 Ross Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ross Larson affiliated with any hospitals?
According to CMS data, Ross Larson is affiliated with Northshore University Healthsystem - Evanston Hospital.
When was this NPI record last updated?
The NPPES record for Ross Larson was last updated on August 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Ross Eugene Larson, MD · NPI 1992326284
Hospitalist physician in Evanston, Illinois. Individual provider, active in the CMS NPPES registry since April 28, 2020.
## Identity
- **NPI:** 1992326284 (Entity type: Individual)
- **Enumerated:** April 28, 2020
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 036166063 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 2650 RIDGE AVE., IM/ICU HOSPITALISTS, Evanston, IL 60201
- **Phone:** (847) 570-1010 · **Fax:** (847) 733-5108
## 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:** Endeavor Health Medical Group (NPI 1265695944, Evanston, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Sanford School Of Medicine Of University Of South Dakota, class of 2020
## Record status
- **NPPES last updated:** August 1, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1992326284) · Data from the CMS NPPES public registry.