M. Nanette Ritchie, D.O.
Psychiatry Physician · Saint Louis, MO
M. Nanette Ritchie, D.O. is a psychiatry physician with a practice address in Saint Louis, Missouri, and NPI 1689703159, issued on Mar 2, 2007. Check the license (Missouri DO110206, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- M. Nanette Ritchie
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- DO110206 MO
Self-reported in NPPES; status is on the state search - Practice location
- 621 S New Ballas RD, Saint Louis, MO 63141
- Phone
- (314) 251-6295
- Enumerated
- Mar 2, 2007
- Record last updated
- Feb 17, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (314) 251-5897
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 965 in Missouri → Look up another NPI →
Also registered at 621 S New Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify M. Nanette Ritchie 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 DO110206Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average psychiatry physician in 2024
72 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam19 claims
- Buspirone Hcl16 claims
- Zolpidem Tartrate11 claims
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.
M. Nanette Ritchie among 965 psychiatry physician records in Missouri
M. Nanette Ritchie, D.O. is one of 965 psychiatry physician records with a practice address in Missouri. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 49% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 49% of these records are
- Record last updated2015 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Missouri
There are 965 psychiatry physician records in Missouri.
All 965 in Missouri → Every provider in Saint Louis → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Vadim Baram, MDSaint Louis, MO 631411124007380
- Neil Brickel, M.D.Saint Louis, MO 631411396716981
- Afaf El-Mashhady, M.D.Saint Louis, MO 631411679571533
- Asif Habib, MDSaint Louis, MO 631411124000104
- Duane Hagen, M.D.Saint Louis, MO 631411285605873
- Saad Khan, M.D.Creve Coeur, MO 631411093707218
- David Krojanker, M.D.Saint Louis, MO 631411114900867
- Mohd Malik, M.D.Saint Louis, MO 631411942208715
Common questions
What is M. Nanette Ritchie, D.O.'s NPI number?
M. Nanette Ritchie, D.O.'s National Provider Identifier (NPI) is 1689703159, issued on Mar 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is M. Nanette Ritchie, D.O. located?
The NPPES record lists a practice address at 621 S New Ballas RD, Saint Louis, MO, 63141. Phone: (314) 251-6295. Providers update this record themselves, so call before visiting.
How can I verify M. Nanette Ritchie, D.O.'s license?
NPPES lists Missouri license number DO110206, 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 M. Nanette Ritchie, D.O. prescribe under Medicare Part D?
In 2024, M. Nanette Ritchie, D.O. had 72 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.