ONTO FERTILITY LAB OF ILLINOIS, LLC
NPI 1073462099
Obstetrics & Gynecology - Reproductive Endocrinology in Chicago, IL
NPI Status: Active since January 23, 2026
Contact Information
371 W ONTARIO ST
CHICAGO, IL
ZIP 60654
Phone: (312) 724-8448
Fax: (312) 724-8448
- Organization
- Obstetrics & Gynecology
- Reproductive Endocrinology
About ONTO FERTILITY LAB OF ILLINOIS, LLC
This page provides the complete NPI Profile along with additional information for Onto Fertility Lab Of Illinois, Llc, a women's health care provider established in Chicago, Illinois operating as a Obstetrics & Gynecology, focusing in reproductive endocrinology . The healthcare provider is registered in the NPI registry with number 1073462099 assigned on January 2026. The practitioner's primary taxonomy code is 207VE0102X. The provider is registered as an organization and their NPI record was last updated January 2026. Onto Fertility Lab Of Illinois, Llc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Jennifer Teschendorf (Rcm Consultant)
- NPI
- 1073462099
- Provider Name
- ONTO FERTILITY LAB OF ILLINOIS, LLC
- Entity Type
- Organization
- Location Address
- 371 W ONTARIO ST CHICAGO, IL 60654
- Location Phone
- (312) 724-8448
- Location Fax
- (312) 724-8448
- Mailing Address
- 1130 S CANAL ST CHICAGO, IL 60607
- Mailing Phone
- (312) 724-8448
- Mailing Fax
- (312) 724-8448
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 01-23-2026
- Last Update Date
- 01-23-2026
- Code Navigator
Women's health care providers like Onto Fertility Lab Of Illinois, Llc treat and diagnose diseases and conditions that affect a woman's physical and emotional health. Women's health professionals come from a variety of different specialties, including obstetrician/gynecologists, general surgeons, perinatologists, physician assistants, nurse practitioners or nurse midwives. A women's health provider might help you with family planning, breast care, pregnancy and child birth, osteoporosis, menopause, heart disease, etc.
Location Map
Secondary Locations
- 1528 Aurora Ave
Naperville, IL 60540
(312) 724-8448 - 520 W Touhy Ave
Park Ridge, IL 60068
(312) 724-8448 - 2567 W Golf Rd
Hoffman Estates, IL 60169
(312) 724-8448
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Obstetrics & Gynecology Reproductive Endocrinology
- Taxonomy Code
- 207VE0102X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility.
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1073462099, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 61 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 3 providers are registered at the same or a nearby location.
CHICAGO, IL 60654
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1073462099, enumerated as an "organization" on January 23, 2026.
The provider is located at 371 W ONTARIO ST CHICAGO, IL 60654 and the phone number is (312) 724-8448.
Obstetrics & Gynecology with taxonomy code 207VE0102X and a focus in Reproductive Endocrinology.
