DR. ANDREW HALLMARK
NPI 1255992855
Anesthesiology in Chicago, IL
About Dr. Andrew Hallmark NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW HALLMARK (NPI 1255992855) is an individual anesthesiology provider in Chicago, Illinois, licensed in California (A192127) and active in the NPI registry since June 2019. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Florida College Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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. Andrew Hallmark 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 Andrew Hallmark reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Las Vegas, NV 89106
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 270 clinicians in this Medicare group
Whittier, CA 90602
- Reassigned Medicare billing, California enrollment
- 5 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.
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 60611
CHICAGO, IL 60611
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 Andrew Hallmark's NPI number?
The NPI number for Andrew Hallmark is 1255992855. It was assigned to this individual provider in the NPPES registry on June 25, 2019.
Where is Andrew Hallmark located?
Andrew Hallmark practices at 251 E Huron St, Chicago, IL 60611. The listed phone number is (630) 933-4800.
What is Andrew Hallmark's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Andrew Hallmark enrolled in Medicare?
Yes. Andrew Hallmark 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 Andrew Hallmark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Hallmark reassigns Medicare benefits to 3 organizations: Faculty Physicians And Surgeons Of Llusm (Las Vegas, NV), Palm Springs Anesthesia Services, PC (San Bernardino, CA) and Obstetric Anesthesia Associates Inc (Whittier, CA). 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 Andrew Hallmark'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 Andrew Hallmark was last updated on April 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Andrew Hallmark · NPI 1255992855
Anesthesiology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since June 25, 2019.
## Identity
- **NPI:** 1255992855 (Entity type: Individual)
- **Enumerated:** June 25, 2019
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A192127 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 251 E HURON ST, Chicago, IL 60611-2908
- **Phone:** (630) 933-4800
## 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): Faculty Physicians And Surgeons Of Llusm (NPI 1124560214, Las Vegas, NV); Palm Springs Anesthesia Services, PC (NPI 1083928501, San Bernardino, CA); Obstetric Anesthesia Associates Inc (NPI 1184041857, Whittier, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Florida College Of Medicine, class of 2019
## Record status
- **NPPES last updated:** April 6, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1255992855) · Data from the CMS NPPES public registry.