TATIANA KREJCI M.D.
NPI 1093246308
Anesthesiology in Chicago, IL
About Tatiana Krejci M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TATIANA KREJCI M.D. (NPI 1093246308) is an individual anesthesiology provider in Chicago, Illinois, licensed in Illinois (036159585) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, is affiliated with Advocate Christ Hospital & Medical Center, and maintains a secondary practice location in Oak Lawn.
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
Tatiana Krejci 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
2Medicare enrollment records show Tatiana Krejci reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- 4,870 clinicians in this Medicare group
Oak Lawn, IL 60453
- Reassigned Medicare billing, Illinois enrollment
- 93 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
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.
Advocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILOther 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 60657
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 Tatiana Krejci's NPI number?
The NPI number for Tatiana Krejci is 1093246308. It was assigned to this individual provider in the NPPES registry on March 27, 2017. The provider is also known as Tatiana Tverdohleb MD.
Where is Tatiana Krejci located?
Tatiana Krejci practices at 836 W Wellington Ave, Chicago, IL 60657. The listed phone number is (773) 975-1600.
What is Tatiana Krejci's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Tatiana Krejci enrolled in Medicare?
Yes. Tatiana Krejci 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 Tatiana Krejci's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tatiana Krejci reassigns Medicare benefits to 2 organizations: Advocate Health And Hospitals Corp. (Chicago, IL) and Midwest Anesthesiologists, Ltd. (Oak Lawn, 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 Tatiana Krejci's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Tatiana Krejci affiliated with any hospitals?
According to CMS data, Tatiana Krejci is affiliated with Advocate Christ Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Tatiana Krejci was last updated on October 24, 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.
# Tatiana Krejci, M.D. · NPI 1093246308
Anesthesiology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since March 27, 2017.
## Identity
- **NPI:** 1093246308 (Entity type: Individual)
- **Enumerated:** March 27, 2017
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 036159585 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 836 W WELLINGTON AVE, Chicago, IL 60657-5147
- **Phone:** (773) 975-1600
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Advocate Health And Hospitals Corp. (NPI 1487951711, Chicago, IL); Midwest Anesthesiologists, Ltd. (NPI 1447209390, Oak Lawn, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** October 24, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1093246308) · Data from the CMS NPPES public registry.