MRS. ALLISON GARLAND GREVEN LCSW
NPI 1669126934
Social Worker - Clinical in Chicago, IL
About Mrs. Allison Garland Greven Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. ALLISON GARLAND GREVEN LCSW (NPI 1669126934) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149019597) and active in the NPI registry since February 2022. She is enrolled in Medicare PECOS and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Mrs. Allison Garland Greven Lcsw 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
2Medicare enrollment records show Allison Greven reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60601
- Reassigned Medicare billing, Illinois enrollment
- 8 clinicians in this Medicare group
Chicago, IL 60618
- Reassigned Medicare billing, Illinois enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60601 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 60601
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 Allison Greven's NPI number?
The NPI number for Allison Greven is 1669126934. It was assigned to this individual provider in the NPPES registry on February 7, 2022. The provider is also known as Allison Garland Lcsw.
Where is Allison Greven located?
Allison Greven practices at 333 N Michigan Ave Ste 1900, Chicago, IL 60601. The listed phone number is (312) 964-4614.
What is Allison Greven's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Allison Greven enrolled in Medicare?
Yes. Allison Greven 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 Allison Greven's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allison Greven reassigns Medicare benefits to 2 organizations: Cira Center For Behavioral Health PC (Chicago, IL) and Lela Counseling, LLC (Chicago, IL). 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 Allison Greven's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Allison Greven was last updated on February 7, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mrs. Allison Garland Greven, LCSW · NPI 1669126934
Clinical provider in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since February 7, 2022.
## Identity
- **NPI:** 1669126934 (Entity type: Individual)
- **Enumerated:** February 7, 2022
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 149019597 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 333 N MICHIGAN AVE STE 1900, Chicago, IL 60601-3994
- **Phone:** (312) 964-4614
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Cira Center For Behavioral Health PC (NPI 1902277395, Chicago, IL); Lela Counseling, LLC (NPI 1700658317, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** February 7, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1669126934) · Data from the CMS NPPES public registry.