Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Cynthia D Byler, DO

Individual provider Occupational Medicine Physician · NPI 1649373994

Cynthia D Byler, DO is an Occupational Medicine Physician in Saint Louis, Missouri. Licensed in Missouri. Registered with an NPI since 2006.

Licensed in
MO
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1050 Old Des Peres Rd Ste 100
Saint Louis, MO 63131-1873 Not confirmed with CMS for 14 years — call before visiting
Phone: (314) 569-0612
Fax: (314) 966-0664
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Occupational Medicine Physician (primary) Taxonomy 2083X0100X · Licence DO R1G13 (MO)

Record details

NPI number1649373994
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedSeptember 5, 2006
Last updated in NPPESOctober 25, 2012

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $15 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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