DR. CYNTHIA H. MASTBROOK D.O.
NPI 1881746311
Anesthesiology in Palos Heights, IL
About Dr. Cynthia H. Mastbrook D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CYNTHIA H. MASTBROOK D.O. (NPI 1881746311) is an individual anesthesiology provider in Palos Heights, Illinois, licensed in Illinois (036-088690) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Palos Community Hospital, and maintains a secondary practice location in Chicago.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 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
Dr. Cynthia H. Mastbrook D.o. 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
3Medicare enrollment records show Cynthia Mastbrook reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Melrose Park, IL 60160
- Reassigned Medicare billing, Illinois enrollment
- 78 clinicians in this Medicare group
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- 385 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 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 6
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.
Palos Community Hospital
Acute Care Hospitals · Palos Heights, ILMedicare 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.
PALOS HEIGHTS, IL 60463
PALOS HEIGHTS, IL 60463
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 Cynthia Mastbrook's NPI number?
The NPI number for Cynthia Mastbrook is 1881746311. It was assigned to this individual provider in the NPPES registry on January 17, 2007. The provider is also known as Dr. Cynthia L. Garvey D.O..
Where is Cynthia Mastbrook located?
Cynthia Mastbrook practices at 12251 S 80th Ave, Palos Heights, IL 60463. The listed phone number is (708) 923-3936.
What is Cynthia Mastbrook's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Cynthia Mastbrook enrolled in Medicare?
Yes. Cynthia Mastbrook 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 Cynthia Mastbrook's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cynthia Mastbrook reassigns Medicare benefits to 3 organizations: Gottlieb Midwest Anesthesiologists, LLC (Melrose Park, IL), Midwest Anesthesia Partners, LLC (Chicago, IL) and Northwestern Medical Faculty Foundation (Carol Stream, 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 Cynthia Mastbrook's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Cynthia Mastbrook affiliated with any hospitals?
According to CMS data, Cynthia Mastbrook is affiliated with Palos Community Hospital.
When was this NPI record last updated?
The NPPES record for Cynthia Mastbrook was last updated on August 23, 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.
# Dr. Cynthia H. Mastbrook, D.O. · NPI 1881746311
Anesthesiology physician in Palos Heights, Illinois. Individual provider, active in the CMS NPPES registry since January 17, 2007.
## Identity
- **NPI:** 1881746311 (Entity type: Individual)
- **Enumerated:** January 17, 2007
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 036-088690 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 12251 S 80TH AVE, Palos Heights, IL 60463-1290
- **Phone:** (708) 923-3936 · **Fax:** (708) 923-8848
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Gottlieb Midwest Anesthesiologists, LLC (NPI 1003832767, Melrose Park, IL); Midwest Anesthesia Partners, LLC (NPI 1255380184, Chicago, IL); Northwestern Medical Faculty Foundation (NPI 1346235314, Carol Stream, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Midwestern University, Chicago College Of Osteopathic Med, class of 1991
## Record status
- **NPPES last updated:** August 23, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1881746311) · Data from the CMS NPPES public registry.