Thread Labs St. Louis — An Honest Editorial Review

Among fertility clinics in Missouri, Thread Labs St. Louis, LLC is one of the more unusual entries in our directory. Based on public records, it is not a clinic patients walk into under that name in 2026. It is a legacy legal entity — an LLC enumerated as an NPI-2 organizational provider in the Obstetrics & Gynecology / Reproductive Endocrinology taxonomy — that was used during the Oma Fertility era at 15320 Conway Road in Chesterfield. Today, the same physical address operates as Arbor Fertility, an independent practice founded by Dr. Shvetha Zarek, MD, FACOG.

In plain English: if you searched for "Thread Labs" after seeing the name on an insurance statement, a provider directory, or a public lab record, you are most likely looking at the corporate shell tied to the Chesterfield REI office that has since rebranded. Patients seeking active fertility care at that address today will interact with Arbor Fertility.

What the Public Record Shows

The NPI registry lists the following for Thread Labs St Louis LLC:

• NPI: 1770213837 (verify at npiregistry.cms.hhs.gov)
• Taxonomy: Obstetrics & Gynecology, Reproductive Endocrinology (207VE0102X)
• Entity type: NPI-2, Organization (Single Specialty Group, 193400000X)
• Practice address: 15320 Conway Rd, Unit 100, Chesterfield, MO 63017-2019
• Mailing address: 160 E Tasman Dr, San Jose, CA 95134-1619 (a corporate-registration address, not a clinical location)
• Authorized official: Shvetha Zarek, MD
• Enumeration date: June 13, 2022

The June 2022 enumeration date aligns with the period when Oma Fertility — the consumer-facing brand operated by parent companies Thread Robotics / Thread Fertility — was opening its three U.S. clinics (New York City, Atlanta, and St. Louis). Reporting from Fertility Bridge in 2023 documented the winding down of Thread Robotics that August, and Pinnacle Fertility subsequently acquired the Oma clinic network. Dr. Zarek later left that arrangement and founded Arbor Fertility, which now occupies 15320 Conway Road as its flagship and procedure location.

Why This Name Still Appears

Legacy NPIs and LLC filings often outlive the brands that created them. An organizational NPI remains in the registry until it is formally deactivated, and state LLC registrations can persist long after operations change hands. For Missouri fertility patients, the practical result is that "Thread Labs St. Louis LLC" may still appear on:

• Insurance claim statements from cycles performed during the Oma Fertility period
• CLIA or FDA tissue-bank registrations carried over during the transition
• Third-party medical directories that draw from NPI data without re-verification
• Medical records, billing statements, or lab reports from 2022–2023

None of this means the entity is currently running a separate clinical program at that address. It does mean patients should confirm which practice is actually providing care today before scheduling.

The Practice at That Address in 2026

Arbor Fertility is the active REI program at 15320 Conway Road. Public sources describe it as follows:

• Medical Director and founder: Shvetha Zarek, MD, FACOG — double board-certified in Obstetrics & Gynecology and in Reproductive Endocrinology & Infertility; medical degree from the University of Virginia School of Medicine (2006); OB/GYN residency at George Washington University (2010); REI fellowship at the National Institutes of Health Clinical Center (2015). Formerly Director of IVF and Assistant Professor at the University of Missouri. Recognized as a Castle Connolly Top Doctor and a St. Louis Magazine Top Doctor.
• Address: 15320 Conway Road, Chesterfield, MO 63017
• Phone: (314) 806-BABY / (314) 806-2229
• Services: IUI, IVF with ICSI, PGT, egg freezing, frozen and fresh embryo transfer, reciprocal IVF, gestational carrier cycles, and virtual consultations
• Satellite offices: Fenton, Creve Coeur, Columbia, St. Peters, St. Charles, Town and Country, and O'Fallon, IL — with IVF procedures performed at Chesterfield

Arbor Fertility is not covered in a separate Fertlo editorial at the time of writing; patients who want to evaluate the practice should use its own website, verify Dr. Zarek's credentials via state medical licensing and the American Board of Obstetrics and Gynecology certification lookup, and check SART for any reporting history once a full calendar year of Arbor-branded cycles is posted.

What This Listing Is — And Isn't

• Is: A legacy REI organizational NPI tied to the Chesterfield address at 15320 Conway Road, with Dr. Shvetha Zarek listed as the authorized official.
• Isn't: A currently branded consumer fertility clinic that patients would contact by the name "Thread Labs." There is no active "Thread Labs" clinic website, phone line distinct from the Arbor Fertility front desk, or standalone marketing presence.

If you received a bill, lab report, or directory reference naming Thread Labs St. Louis LLC for a cycle that ran in 2022 or 2023, that is consistent with the Oma Fertility era at this site. Contact Arbor Fertility's billing team or request records through Dr. Zarek's office for any historical chart or claim questions.

How It Fits Into Fertility Care

The practice at this address is a full-service REI program offering IUI, IVF, egg freezing, PGT, donor egg, donor sperm, and gestational carrier cycles. That functional scope did not change through the Oma-to-Arbor transition; what changed is the ownership, branding, and organizational entity on record. Lab work — oocyte identification, embryo culture, ICSI, vitrification, sperm preparation — is handled on site to keep specimen handoffs inside the building during time-sensitive cycle steps.

The St. Louis REI Market

For a broader view of reproductive medicine options in the region, patients can compare:

• Arbor Fertility (15320 Conway Rd, Chesterfield — the current operator at the Thread Labs address)
• MCRM Fertility (17300 North Outer Forty, Chesterfield) — see our MCRM Fertility editorial
• Kindbody St. Louis (formerly Vios Fertility; 347 N Lindbergh Blvd, Creve Coeur) — see our Vios/Kindbody editorial
• Washington University Fertility and Reproductive Medicine — the academic REI program affiliated with Barnes-Jewish Hospital

Each has a distinct ownership model (independent, network-affiliated, national, or academic), different insurance contract footprints, and different SART reporting histories. Patients should cross-reference the SART Clinic Summary Report and the CDC ART National Summary before choosing a program.

Missouri Insurance Context

Missouri does not have a state fertility-insurance coverage mandate. Insurers operating in Missouri are not required by state law to cover IVF, IUI, or diagnostic fertility workup, which means coverage depends entirely on the employer's health plan. Self-pay IVF in the St. Louis metro typically runs in the range documented in most U.S. markets without mandates, with lab fees, PGT, and embryo storage commonly billed separately. See our fertility insurance mandates by state guide for details.

Patient Experience

Thread Labs St. Louis LLC does not maintain a patient-facing review profile; it is a corporate entity rather than a branded clinic. The practice currently operating at 15320 Conway Road — Arbor Fertility — carries a 4.9-star rating across 93 reviews on public aggregators, with patient comments focused on individualized treatment plans, Dr. Zarek's communication style, and the contrast with higher-volume "fertility factory" settings. Reviews alone are not a substitute for outcomes data; patients should ask for the program's current live-birth rate by age band and compare against SART and CDC national benchmarks.

Considering At-Home Insemination?

Not every fertility journey begins in a clinical embryology lab. At-home intracervical insemination (ICI) is a lower-cost, private option for patients with no known fertility diagnosis — single parents by choice, same-sex couples, and people who want to try a few cycles before committing to IVF.

At-home insemination kits from MakeAMom come with step-by-step instructions for donor or partner sperm, require no clinic visit, and arrive in plain, discreet packaging. If you have a known fertility diagnosis, have been trying for 12 months (six months if over 35), or a physician has already recommended IUI or IVF, a board-certified REI is the right next step.

A 5-Minute Verification Checklist

If you encounter any fertility-related business name you don't recognize on a bill, insurance statement, or directory, five quick checks will tell you what you are dealing with:

1. NPI registry — npiregistry.cms.hhs.gov confirms entity type, taxonomy, practice address, and the authorized official on record.
2. SART Clinic Finder — sartcorsonline.com shows whether a clinic is a SART member and reports cycle outcomes.
3. CDC ART Fertility Clinic Success Rates — cdc.gov/art/reports provides standardized national data.
4. State medical board — Missouri patients can verify physician licensure with the Missouri Division of Professional Registration.
5. Call the practice directly — Confirm which brand is operating at the listed address today, whether they accept your insurance, and who will own your medical records going forward.

Location and Contact

Registered practice address: 15320 Conway Rd, Unit 100, Chesterfield, MO 63017-2019 Registered mailing address: 160 E Tasman Dr, San Jose, CA 95134-1619 (corporate registration; not a clinical location) Authorized official on NPI record: Shvetha Zarek, MD Current operator at this address (2026): Arbor Fertility, (314) 806-2229

Frequently Asked Questions

Is Thread Labs St. Louis LLC an active fertility clinic I can schedule with? Not under that name. The NPI entity Thread Labs St. Louis LLC remains on record with the Centers for Medicare & Medicaid Services at 15320 Conway Road in Chesterfield, but the active fertility practice at that address in 2026 operates as Arbor Fertility under Dr. Shvetha Zarek, MD. Patients seeking care should contact Arbor Fertility directly at (314) 806-2229.

Why does Thread Labs still appear in the NPI registry if the brand is no longer operating? Organizational NPIs stay in the registry until formally deactivated, and LLCs remain in state corporate databases until dissolved or withdrawn. It is common for an NPI tied to a prior brand to persist in provider directories, insurance systems, and medical records long after a rebrand or ownership transition. Public databases reflect the administrative record, not the current consumer-facing brand.

How is Thread Labs related to Oma Fertility, Thread Robotics, and Arbor Fertility? Reporting from Fertility Bridge documented that Thread Robotics (also known as Thread Fertility) was the parent of Oma Fertility, which opened a St. Louis clinic at 15320 Conway Road during 2022–2023. The parent company wound down in August 2023, and the Oma clinic network was later acquired by Pinnacle Fertility. Dr. Shvetha Zarek subsequently founded Arbor Fertility, which now operates independently at the same Chesterfield address. The Thread Labs NPI appears to be a legacy entity from the Oma era.

Does this affect my medical records or prior insurance claims? If you had cycles at this location in 2022 or 2023, your records and claims may reference the earlier brand or entity names. Request a copy of your chart directly from the current practice operating at the address, and verify claim-level billing-entity names with your insurer if you are resolving older balances or reimbursement questions.

Editorial note: Independently written by the Fertlo editorial team; not sponsored. Legal-entity structure and timeline described based on NPI registry records, Missouri corporate filings, and reporting from industry publications. Readers should verify current operating status directly with the practice. See our editorial policy.