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ONTO FERTILITY LAB OF ILLINOIS, LLC
NPI 1073462099
Obstetrics & Gynecology - Reproductive Endocrinology in Chicago, IL

Active since January 23, 2026
371 W ONTARIO ST, CHICAGO, IL 60654(312) 724-8448(312) 724-8448 Get Directions Write a Review

NPPES record last updated: January 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Onto Fertility Lab Of Illinois, Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ONTO FERTILITY LAB OF ILLINOIS, LLC (NPI 1073462099), doing business as Onto Health, is a healthcare organization registered as a reproductive endocrinology in Chicago, Illinois and active in the NPI registry since January 2026. The organization maintains 3 additional practice locations and lists Jennifer Teschendorf, Rcm Consultant, as its authorized official.

NPPES Registry Identity

NPI1073462099
Entity TypeOrganization
Primary Taxonomy207VE0102X
Legal Business NameONTO FERTILITY LAB OF ILLINOIS, LLC
Location Address371 W ONTARIO STChicago, IL 60654-5716
Mailing Address1130 S Canal StChicago, IL 60607-5058 · (312) 724-8448 · Fax (312) 724-8448
Phone(312) 724-8448
Fax(312) 724-8448
Organization SubpartNo
Authorized OfficialJennifer TeschendorfRcm Consultant · (612) 458-8050
Enumeration DateJanuary 23, 2026
NPPES CertifiedJanuary 23, 2026
✔ NPI 1073462099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Reproductive EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code207VE0102X
Definition
An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility.
371 W ONTARIO ST, Chicago, IL 60654
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Other Names 1

Doing Business AsOnto Health

Secondary Practice Locations 3

Location 11528 Aurora AveNaperville, IL 60540-6210 · Phone (312) 724-8448 · Fax (312) 724-8448
Location 22567 W Golf RdHoffman Estates, IL 60169-1165 · Phone (312) 724-8448 · Fax (312) 724-8448
Location 3520 W Touhy AvePark Ridge, IL 60068-4276 · Phone (312) 724-8448 · Fax (312) 724-8448

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ROOHI NAJEEMUDDIN M.D.
Obstetrics & Gynecology (Reproductive Endocrinology)
371 W ONTARIO ST
CHICAGO, IL 60654
Cook County (312) 724-8448
KAROLINA MACULEWICZ
Pharmacist
371 W ONTARIO ST
CHICAGO, IL 60654
Cook County (312) 280-1599
VICTORIA LARSEN
Nurse Practitioner (Women's Health)
371 W ONTARIO ST
CHICAGO, IL 60654
Cook County (312) 724-8448

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 Onto Fertility Lab Of Illinois, LLC's NPI number?

The NPI number for Onto Fertility Lab Of Illinois, LLC is 1073462099. It was assigned to this organization in the NPPES registry on January 23, 2026. The provider is doing business as Onto Health.

Where is Onto Fertility Lab Of Illinois, LLC located?

Onto Fertility Lab Of Illinois, LLC is located at 371 W Ontario St, Chicago, IL 60654. The listed phone number is (312) 724-8448.

What is Onto Fertility Lab Of Illinois, LLC's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Reproductive Endocrinology, with taxonomy code 207VE0102X.

When was this NPI record last updated?

The NPPES record for Onto Fertility Lab Of Illinois, LLC was last updated on January 23, 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.