SARA J. SLEZAK D.O. – NPI #1285128926
Obstetrics & Gynecology
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
SARA SLEZAK is a physician located in CHICAGO, IL. NPPES has assigned the NPI number 1285128926 to SARA SLEZAK on June 17, 2018. It is a Type-1 NPI, indicating this NPI number is associated with an individual. She is also known by her former name SARA JEAN TWIEHAUS. The primary taxonomy selected by this provider is 207V00000X from the Health Care Provider Taxonomy code set, which is classified as Obstetrics & Gynecology.
The NPI profile was last updated on Jan 22, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for SARA SLEZAK below.
NPI Profile for
SARA J. SLEZAK
(about 8 years ago)
CHICAGO, IL 60608-2486 Phone: (773) 584-6200 Fax:
1 Other location(s):
Chicago, IL 60625-3645
Phone: (773) 878-7787
Fax: (773) 878-0788
EVANSTON, IL 60201-1700 Phone: (847) 570-2040 Fax: (847) 570-5315
Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 207V00000X - Obstetrics & Gynecology (Primary) |
IL | 036.161001 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.
Additional Information
- Refer to Part B
- Order Durable Medical Equipment
- Refer to Home Health Agency
- Order Power Mobility Devices
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