ERIN LARK
NPI 1871983288
Nurse Practitioner - Family in Chicago, IL
About Erin Lark NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ERIN LARK (NPI 1871983288) is an individual family provider in Chicago, Illinois, licensed in Illinois (209-012493) and active in the NPI registry since January 2015. She is enrolled in Medicare PECOS, is affiliated with Mclaren Central Michigan, and maintains a secondary practice location in Kalamazoo.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Erin Lark 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
11Medicare enrollment records show Erin Lark reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Joseph, MI 49085
- Reassigned Medicare billing, Michigan enrollment
- 51 clinicians in this Medicare group
Rockford, IL 61104
- Reassigned Medicare billing, Illinois enrollment
- 106 clinicians in this Medicare group
Kalamazoo, MI 49007
- Reassigned Medicare billing, Michigan enrollment
- 1,133 clinicians in this Medicare group
Flushing, MI 48433
- Reassigned Medicare billing, Michigan enrollment
- 416 clinicians in this Medicare group
Flint, MI 48532
- Reassigned Medicare billing, Michigan enrollment
- 444 clinicians in this Medicare group
Livonia, MI 48154
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Epmg Of Michigan PC
- 175 clinicians in this Medicare group
Wyandotte, MI 48192
- Reassigned Medicare billing, Michigan enrollment
- 57 clinicians in this Medicare group
Iron River, MI 49935
- Reassigned Medicare billing, Michigan enrollment
- 244 clinicians in this Medicare group
Iron River, MI 49935
- Reassigned Medicare billing, Michigan enrollment
- 264 clinicians in this Medicare group
Oswego, NY 13126
- Reassigned Medicare billing, New York enrollment
- 129 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 3
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mclaren Central Michigan
Acute Care Hospitals · Mount Pleasant, MITrinity Health Ann Arbor Hospital
Acute Care Hospitals · Ann Arbor, MICommunity Memorial Hospital, Inc
Critical Access Hospitals · Hamilton, NYSakakawea Medical Center - Cah
Critical Access Hospitals · Hazen, NDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60613 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.
CHICAGO, IL 60613
CHICAGO, IL 60613
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 Erin Lark's NPI number?
The NPI number for Erin Lark is 1871983288. It was assigned to this individual provider in the NPPES registry on January 23, 2015.
Where is Erin Lark located?
Erin Lark practices at 840 W Irving Park Rd Suite 301, Chicago, IL 60613. The listed phone number is (872) 206-2813.
What is Erin Lark's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Erin Lark enrolled in Medicare?
Yes. Erin Lark 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 Erin Lark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erin Lark reassigns Medicare benefits to 11 organizations: Hospitalist Physicians Medical Group Of Michigan, PC (Saint Joseph, MI), Rockford Emergency Physicians, LLC (Rockford, IL), Bronson Methodist Hospital (Kalamazoo, MI), Mclaren Medical Group (Flushing, MI), Mclaren Hospital Group (Flint, MI) and 6 more organizations, listed in the Medicare section above. 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 Erin Lark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Erin Lark accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Erin Lark 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 Erin Lark affiliated with any hospitals?
According to CMS data, Erin Lark is affiliated with Mclaren Central Michigan, Trinity Health Ann Arbor Hospital, Community Memorial Hospital, Inc and Sakakawea Medical Center - Cah.
When was this NPI record last updated?
The NPPES record for Erin Lark was last updated on January 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Erin Lark · NPI 1871983288
Family physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since January 23, 2015.
## Identity
- **NPI:** 1871983288 (Entity type: Individual)
- **Enumerated:** January 23, 2015
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 209-012493 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 840 W IRVING PARK RD, SUITE 301, Chicago, IL 60613-3011
- **Phone:** (872) 206-2813
## 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:** 11 organizations under Medicare reassignment (form CMS-855R): Hospitalist Physicians Medical Group Of Michigan, PC (NPI 1407618234, Saint Joseph, MI); Rockford Emergency Physicians, LLC (NPI 1639876634, Rockford, IL); Bronson Methodist Hospital (NPI 1417961137, Kalamazoo, MI); Mclaren Medical Group (NPI 1053458091, Flushing, MI); Mclaren Hospital Group (NPI 1942026174, Flint, MI); and 6 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** January 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1871983288) · Data from the CMS NPPES public registry.