Margaret Reiker
Internal Medicine Physician · Saint Louis, MO
Margaret Reiker is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1902915853, issued on Aug 30, 2006. Check the license (Missouri 103304, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Margaret Reiker
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 103304 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3009 N Ballas RD, Saint Louis, MO 63131
- Phone
- (314) 996-5900
- Enumerated
- Aug 30, 2006
- Record last updated
- Dec 19, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (314) 996-5910
- Medicaid ID
- 205230402 MO
- Medicare enrollment
- Enrolled (PECOS I20080201000148); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 3009 N Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Proceso Arenos, MDSurgery Physician1245259498
- Jayne Aschen, PA-CPhysician Assistant1215236740
Verify Margaret Reiker 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 103304Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average internal medicine physician in 2024
13,077 Medicare Part D claims for 913 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 420 claims were for opioids.
Most prescribed
- Atorvastatin Calcium853 claims
- Levothyroxine Sodium573 claims
- Amlodipine Besylate556 claims
- Losartan Potassium483 claims
- Rosuvastatin Calcium475 claims
- Gabapentin375 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: $1,297.34
79 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 4 group practices
- Aging Well Health Care, LLCSaint Louis, MO
- Elite Physical Therapy OF Creve Coeur LLCCreve Coeur, MO
- Mercy Clinic East CommunitiesSaint Louis, MO
- Mercy Hospitals East CommunitiesSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Reiker among 2,604 internal medicine physician records in Missouri
Margaret Reiker is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% 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 · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1993 · median 2006 among the 1,443 with a school on file
- Record last updated2013 · 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 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Asim Ali, MDSaint Louis, MO 631311821047218
- Paul Altsheler, MDSaint Louis, MO 631311346225372
- Richard Bligh, MDSaint Louis, MO 631311306813050
- J Corder, MDSaint Louis, MO 631311184698987
- Thomas Greco, M.D.Saint Louis, MO 631311417920927
- Zahirul Haque, MDSaint Louis, MO 631311578536546
- Joseph Hilgeman, MDDes Peres, MO 631311407820145
- Andrea Holthaus, MDSaint Louis, MO 631311528031473
Common questions
What is Margaret Reiker's NPI number?
Margaret Reiker's National Provider Identifier (NPI) is 1902915853, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Reiker located?
The NPPES record lists a practice address at 3009 N Ballas RD, Saint Louis, MO, 63131. Phone: (314) 996-5900. Providers update this record themselves, so call before visiting.
How can I verify Margaret Reiker's license?
NPPES lists Missouri license number 103304, 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 Margaret Reiker prescribe under Medicare Part D?
In 2024, Margaret Reiker had 13,077 Medicare Part D claims for 913 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.