Nancy Jane Niemann Royer, MD
Emergency Medicine Physician · O Fallon, MO
Nancy Jane Niemann Royer, MD is an emergency medicine physician with a practice address in O Fallon, Missouri, and NPI 1326094145, issued on May 25, 2006. Check the license (Missouri R9E46, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Nancy Jane Niemann Royer
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- R9E46 MO
Self-reported in NPPES; status is on the state search - Practice location
- 2 Progress Point Parkway, O Fallon, MO 63368
- Phone
- (636) 344-1151
- Enumerated
- May 25, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (636) 344-1176
- Medicaid ID
- 207810318 MO
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Verify Nancy Jane Niemann Royer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license R9E46Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average emergency medicine physician in 2024
77 Medicare Part D claims for 53 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Nancy Jane Niemann Royer among 1,405 emergency medicine physician records in Missouri
Nancy Jane Niemann Royer, MD is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2021 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Missouri
There are 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in O Fallon → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Victor Bailey, DOO Fallon, MO 633681760518336
- Randi Becker, MDO Fallon, MO 633681235392788
- Leo Hsu, MDO Fallon, MO 633681215965702
- Shirin Pinto, MDDardenne Prairie, MO 633681134102262
- Anjum Razzaque, M.D.O Fallon, MO 633681962427229
- Jason Schlautman, M.D.O Fallon, MO 633681609086750
- Betty Varghese, M.D.O Fallon, MO 633681073715702
- Robert Wiele, MDO Fallon, MO 633681356449771
Common questions
What is Nancy Jane Niemann Royer, MD's NPI number?
Nancy Jane Niemann Royer, MD's National Provider Identifier (NPI) is 1326094145, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Jane Niemann Royer, MD located?
The NPPES record lists a practice address at 2 Progress Point Parkway, O Fallon, MO, 63368. Phone: (636) 344-1151. Providers update this record themselves, so call before visiting.
How can I verify Nancy Jane Niemann Royer, MD's license?
NPPES lists Missouri license number R9E46, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nancy Jane Niemann Royer, MD prescribe under Medicare Part D?
In 2024, Nancy Jane Niemann Royer, MD had 77 Medicare Part D claims for 53 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.