Rachael A. Mergenmeier, D.O.
Family Medicine Physician · Saint Peters, MO
Rachael A. Mergenmeier, D.O. is a family medicine physician with a practice address in Saint Peters, Missouri, and NPI 1518957265, issued on Oct 25, 2005. Check the license (Missouri 2008011538, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Rachael A. Mergenmeier
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 2008011538 MO
34007396 OH
Self-reported in NPPES; status is on the state search - Practice location
- 107 Piper Hill Dr, Saint Peters, MO 63376
- Phone
- (636) 939-3648
- Enumerated
- Oct 25, 2005
- Record last updated
- Aug 11, 2025
- Medicaid ID
- 2206786 OH
- Medicare enrollment
- Enrolled (PECOS I20081022000515); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 107 Piper Hill Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Bradshaw, M.D.Pediatrics Physician1558335638
- Latasha Cunningham, NPFamily Nurse Practitioner1710118161
- Lisa Eloff, RN, CPNPPediatric Nurse Practitioner1366688327
- Mary Ernst, FNPNurse Practitioner1487694659
- Ramesh Khurana, MDFamily Medicine Physician1922038736
- Edward Kunst, MDInternal Medicine Physician1467428672
Verify Rachael A. Mergenmeier 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 2008011538Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
31 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of 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.
Industry payments in 2024: $315.76
6 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mercy Clinic East CommunitiesSaint Peters, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachael A. Mergenmeier among 2,991 family medicine physician records in Missouri
Rachael A. Mergenmeier, D.O. is one of 2,991 family medicine physician records with a practice address in Missouri. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1998 · median 2006 among the 1,778 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 family medicine physician records list a practice address in Saint Peters
They are 27 of the 1,259 NPPES records with a practice address in Saint Peters, and 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Saint Peters → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Michael Adams, DOSt Peters, MO 633761235107012
- Jeffrey Atkins, M.D.Saint Peters, MO 633761962496695
- Shawn Brunk, DOSaint Peters, MO 633761558303404
- Mark Hingst, M.D.Saint Peters, MO 633761053372847
- Aubra Houchin, DOSt Peters, MO 633761598737819
- Ramesh Khurana, MDSaint Peters, MO 633761922038736
- Rosa Kincaid, MDSaint Peters, MO 633761932109402
- Anne Lyng Hibbard, M.D.Saint Peters, MO 633761184618415
Common questions
What is Rachael A. Mergenmeier, D.O.'s NPI number?
Rachael A. Mergenmeier, D.O.'s National Provider Identifier (NPI) is 1518957265, issued on Oct 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Rachael A. Mergenmeier, D.O. located?
The NPPES record lists a practice address at 107 Piper Hill Dr, Saint Peters, MO, 63376. Phone: (636) 939-3648. Providers update this record themselves, so call before visiting.
How can I verify Rachael A. Mergenmeier, D.O.'s license?
NPPES lists Missouri license number 2008011538, 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 Rachael A. Mergenmeier, D.O. prescribe under Medicare Part D?
In 2024, Rachael A. Mergenmeier, D.O. had 31 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.