ZACHARY R. BOOK MD
NPI 1972739431
Emergency Medicine in Chicago, IL
About Zachary R. Book Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY R. BOOK MD (NPI 1972739431) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (125-056738) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, is affiliated with Owensboro Health Regional Hospital, and maintains 7 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 7
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
Zachary R. Book 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 Reassignments
8Medicare enrollment records show Zachary Book reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Henderson, KY 42420
- Reassigned Medicare billing, Kentucky enrollment
- 643 clinicians in this Medicare group
Tulsa, OK 74136
- Reassigned Medicare billing, Oklahoma enrollment
- 226 clinicians in this Medicare group
Stillwater, OK 74074
- Reassigned Medicare billing, Oklahoma enrollment
- 298 clinicians in this Medicare group
Oklahoma City, OK 73102
- Reassigned Medicare billing, Oklahoma enrollment
- Medicare enrollment name: Emergency Physicians Of Mid-America PC
- 310 clinicians in this Medicare group
Tucumcari, NM 88401
- Reassigned Medicare billing, New Mexico enrollment
- 2,331 clinicians in this Medicare group
Taos, NM 87571
- Reassigned Medicare billing, New Mexico enrollment
- 122 clinicians in this Medicare group
Vernal, UT 84078
- Reassigned Medicare billing, Utah enrollment
- 24 clinicians in this Medicare group
Sonora, CA 95370
- Reassigned Medicare billing, California enrollment
- 36 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Owensboro Health Regional Hospital
Acute Care Hospitals · Owensboro, KYSsm Health St Anthony Hospital - Midwest
Acute Care Hospitals · Midwest City, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60631 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.
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 60631
CHICAGO, IL 60631
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 Zachary Book's NPI number?
The NPI number for Zachary Book is 1972739431. It was assigned to this individual provider in the NPPES registry on June 10, 2009.
Where is Zachary Book located?
Zachary Book practices at 7435 W Talcott Ave Resurrection Emergency Medicine Residency Program, Chicago, IL 60631. The listed phone number is (773) 792-7921.
What is Zachary Book's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Zachary Book enrolled in Medicare?
Yes. Zachary Book 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 Zachary Book's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Book reassigns Medicare benefits to 8 organizations: Owensboro Health Medical Group, Inc. (Henderson, KY), Emergency Medicine Physicians Of Tulsa County, LLC (Tulsa, OK), South Central Emergency Services PC (Stillwater, OK), Emergency Physicians Of Mid-America, P.C. (Oklahoma City, OK), Presbyterian Healthcare Services (Tucumcari, NM) and 3 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 Zachary Book's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Zachary Book accept?
Health plans from Blue Cross and Blue Shield of Oklahoma list Zachary Book 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 Zachary Book affiliated with any hospitals?
According to CMS data, Zachary Book is affiliated with Owensboro Health Regional Hospital and Ssm Health St Anthony Hospital - Midwest.
When was this NPI record last updated?
The NPPES record for Zachary Book was last updated on June 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Zachary R. Book, MD · NPI 1972739431
Emergency Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since June 10, 2009.
## Identity
- **NPI:** 1972739431 (Entity type: Individual)
- **Enumerated:** June 10, 2009
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 125-056738 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 7435 W TALCOTT AVE, RESURRECTION EMERGENCY MEDICINE RESIDENCY PROGRAM, Chicago, IL 60631-3707
- **Phone:** (773) 792-7921
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Owensboro Health Medical Group, Inc. (NPI 1588019186, Henderson, KY); Emergency Medicine Physicians Of Tulsa County, LLC (NPI 1003098773, Tulsa, OK); South Central Emergency Services PC (NPI 1558663724, Stillwater, OK); Emergency Physicians Of Mid-America, P.C. (NPI 1063825297, Oklahoma City, OK); Presbyterian Healthcare Services (NPI 1962488304, Tucumcari, NM); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Cincinnati College Of Medicine, class of 2009
## Record status
- **NPPES last updated:** June 18, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1972739431) · Data from the CMS NPPES public registry.