Marta R. Mortensen, MD
Family Medicine Physician · Saint Louis, MO
Marta R. Mortensen, MD is a family medicine physician with a practice address in Saint Louis, Missouri, and NPI 1538112883, issued on May 18, 2006. Check the license (Missouri 102738, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Marta R. Mortensen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 102738 MO
Self-reported in NPPES; status is on the state search - Practice location
- 8793 Watson RD, Saint Louis, MO 63119
- Phone
- (314) 961-0900
- Enumerated
- May 18, 2006
- Record last updated
- Feb 26, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (314) 961-0909
- Medicaid ID
- 205163306 MO
- Medicare enrollment
- Enrolled (PECOS I20050418000040); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 8793 Watson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denise Buck, M. D.Family Medicine Physician1083760599
- Tshiswaka Kayembe, M.D.Cardiovascular Disease Physician1164477766
Verify Marta R. Mortensen 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 102738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average family medicine physician in 2024
90 Medicare Part D claims for 17 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% 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.
Bills Medicare through one group practice
- Missouri State UniversitySpringfield, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marta R. Mortensen among 2,991 family medicine physician records in Missouri
Marta R. Mortensen, MD 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 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1990 · median 2006 among the 1,778 with a school on file
- Record last updated2013 · 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).
Family Medicine Physician providers in Missouri
There are 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Saint Louis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Denise Buck, M. D.Saint Louis, MO 631191083760599
- Kyra Cass, MDSaint Louis, MO 631191932198231
- Roohi Desai, MDSaint Louis, MO 631191770533184
- Ramadevi Devabhaktuni, M.D.Saint Louis, MO 631191891789558
- Mary Fox, MDSaint Louis, MO 631191710957287
- Aaron Guthrie, MDSaint Louis, MO 631191144361494
- Nneka Ichoku, D.O., MPHSaint Louis, MO 631191548422215
- Babul Kulkarni, MDSaint Louis, MO 631191225200769
Common questions
What is Marta R. Mortensen, MD's NPI number?
Marta R. Mortensen, MD's National Provider Identifier (NPI) is 1538112883, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marta R. Mortensen, MD located?
The NPPES record lists a practice address at 8793 Watson RD, Saint Louis, MO, 63119. Phone: (314) 961-0900. Providers update this record themselves, so call before visiting.
How can I verify Marta R. Mortensen, MD's license?
NPPES lists Missouri license number 102738, 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 Marta R. Mortensen, MD prescribe under Medicare Part D?
In 2024, Marta R. Mortensen, MD had 90 Medicare Part D claims for 17 beneficiaries; 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.