Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Nancy Jane Niemann Royer, MD

Individual provider Emergency Medicine Physician · NPI 1326094145

Dr. Nancy Jane Niemann Royer, MD is an Emergency Medicine Physician in O Fallon, Missouri. Licensed in Missouri. Registered with an NPI since 2006.

Licensed in
MO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2 Progress Point Parkway Progress West Health Care Center Attn ER
O Fallon, MO 63368
Phone: (636) 344-1151
Fax: (636) 344-1176
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence R9E46 (MO)

Record details

NPI number1326094145
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 25, 2006
Last updated in NPPESDecember 17, 2021
Certification dateDecember 17, 2021

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