JOSEPH STOCK M.D.
NPI 1164462248
Emergency Medicine - Emergency Medical Services in Chicago, IL
About Joseph Stock M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOSEPH STOCK M.D. (NPI 1164462248) is an individual emergency medical services provider in Chicago, Illinois, licensed in Illinois (036-106198) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Uw Health, and maintains a secondary practice location in Harvard.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Joseph Stock M.d. 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
10Medicare enrollment records show Joseph Stock reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Belvidere, IL 61008
- Reassigned Medicare billing, Illinois enrollment
- 90 clinicians in this Medicare group
Rockford, IL 61104
- Reassigned Medicare billing, Illinois enrollment
- 106 clinicians in this Medicare group
Janesville, WI 53548
- Reassigned Medicare billing, Illinois enrollment
- 671 clinicians in this Medicare group
Florence, AL 35630
- Reassigned Medicare billing, Alabama enrollment
- 59 clinicians in this Medicare group
New Albany, MS 38652
- Reassigned Medicare billing, Mississippi enrollment
- Also billed through NPI 1821103516 (Mississippi)
- 103 clinicians in this Medicare group
Tupelo, MS 38801
- Reassigned Medicare billing, Mississippi enrollment
- 108 clinicians in this Medicare group
Calhoun City, MS 38916
- Reassigned Medicare billing, Mississippi enrollment
- 72 clinicians in this Medicare group
Birmingham, AL 35205
- Reassigned Medicare billing, Alabama enrollment
- 646 clinicians in this Medicare group
Greenville, MS 38703
- Reassigned Medicare billing, Mississippi enrollment
- 123 clinicians in this Medicare group
Anaheim, CA 92801
- Reassigned Medicare billing, California enrollment
- 40 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 4
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.
Uw Health
Acute Care Hospitals · Rockford, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60610 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Joseph Stock's NPI number?
The NPI number for Joseph Stock is 1164462248. It was assigned to this individual provider in the NPPES registry on June 7, 2006.
Where is Joseph Stock located?
Joseph Stock practices at 119 W Chestnut St, Chicago, IL 60610. The listed phone number is (312) 379-0228.
What is Joseph Stock's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.
Is Joseph Stock enrolled in Medicare?
Yes. Joseph Stock 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 Joseph Stock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Stock reassigns Medicare benefits to 10 organizations: Belvidere Emergency Physicians, LLC (Belvidere, IL), Rockford Emergency Physicians, LLC (Rockford, IL), Mercy Health System Corporation (Janesville, WI), Northwest Alabama Emergency Medicine LLC (Florence, AL), Pontotoc Health Services, Inc. (New Albany, MS) and 5 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 Joseph Stock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Joseph Stock accept?
Health plans from Cigna Healthcare list Joseph Stock 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 Joseph Stock affiliated with any hospitals?
According to CMS data, Joseph Stock is affiliated with Uw Health.
When was this NPI record last updated?
The NPPES record for Joseph Stock was last updated on June 30, 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.
# Joseph Stock, M.D. · NPI 1164462248
Emergency Medical Services physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since June 7, 2006.
## Identity
- **NPI:** 1164462248 (Entity type: Individual)
- **Enumerated:** June 7, 2006
- **Primary specialty:** Emergency Medicine - Emergency Medical Services · taxonomy 207PE0004X
- **State license:** 036-106198 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 119 W CHESTNUT ST, Chicago, IL 60610-3288
- **Phone:** (312) 379-0228
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Belvidere Emergency Physicians, LLC (NPI 1306543319, Belvidere, IL); Rockford Emergency Physicians, LLC (NPI 1639876634, Rockford, IL); Mercy Health System Corporation (NPI 1598718603, Janesville, WI); Northwest Alabama Emergency Medicine LLC (NPI 1639692767, Florence, AL); Pontotoc Health Services, Inc. (NPI 1063813335, New Albany, MS); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 1999
## Record status
- **NPPES last updated:** June 30, 2023
- **Other identifiers:** Medicaid 036106198-1 (IL); Other DB9340 (IL); Other P00177284 (IL)
---
Source: [NPI Profile](https://npiprofile.com/npi/1164462248) · Data from the CMS NPPES public registry.