Erik Olson, NP
Nurse Practitioner (CMS) · Chicago, IL
At a glance
5841 S Maryland Ave, Chicago, IL 60637-1443
NPPES record updated Feb 6, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
5841 S Maryland AveChicago, IL 60637-1443
Additional reported practice locations
621 Memorial Dr Ste 502South Bend, IN 466011075
Phone: 5746475875
Fax: 5746475878 1234 Napier Ave
Saint Joseph, MI 490852112
Phone: 2699854632 830 W High St Ste 360
Lima, OH 458013985
Phone: 4192277117
Fax: 4192272848 31 N Saint Joseph Ave
Niles, MI 491202207
Phone: 2699854632 500 Arcade Ave Ste 210
Elkhart, IN 465142485
Phone: 5743895656
Fax: 5745237891
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2023
- CMS specialties
- Nurse Practitioner
Practice groups
Reported hospital affiliations
- Franciscan Health Michigan City Michigan City, IN
- Memorial Hospital Of South Bend South Bend, IN
- The University Of Chicago Medical Center Chicago, IL
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Nurse Practitioner (CMS)
- Taxonomy code
- 363LA2100X
- Enumeration date
- Aug 30, 2021
- Record updated
- Feb 6, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- NP
Reported taxonomies and licenses
363L00000X
License reported: 4704351690 MI
363LA2100X · Primary
License reported: 209031123 IL
363LA2100X
License reported: 71014328A IN
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
5841 S Maryland AveChicago, IL 60637-1443
- Phone
- (888) 824-0200
Mailing address
3245 HEALTH DR STE 100GRANGER, IN 465301380
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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