Kathryn M. Diemer, MD
Endocrinology, Diabetes & Metabolism Physician · Saint Louis, MO
Kathryn M. Diemer, MD is an endocrinology, diabetes & metabolism physician with a practice address in Saint Louis, Missouri, and NPI 1891713590, issued on Jul 18, 2006. Check the license (Missouri R1G54, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Kathryn M. Diemer
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- R1G54 MO
Self-reported in NPPES; status is on the state search - Practice location
- 10 Barnes West Dr, Saint Louis, MO 63141
- Phone
- (314) 454-7775
- Enumerated
- Jul 18, 2006
- Record last updated
- Apr 17, 2025
- Fax
- (314) 996-3087
- Medicaid ID
- 202711230 MO
- Medicare enrollment
- Enrolled (PECOS I20100922000089); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 206 in Missouri → Look up another NPI →
Also registered at 10 Barnes West Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kathryn M. Diemer 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 R1G54Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
164 Medicare Part D claims for 50 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
Most prescribed
- Vitamin D240 claims
- Tymlos35 claims
- Teriparatide25 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Aging Well Health Care, LLCSaint Louis, MO
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathryn M. Diemer among 206 endocrinology, diabetes & metabolism physician records in Missouri
Kathryn M. Diemer, MD is one of 206 endocrinology, diabetes & metabolism physician records with a practice address in Missouri. 88% 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, 50% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1985 · median 2003 among the 148 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Missouri
There are 206 endocrinology, diabetes & metabolism physician records in Missouri.
All 206 in Missouri → Every provider in Saint Louis → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Roberto Civitelli, MDSaint Louis, MO 631411194743872
- Carolyn Jachna, MDSaint Louis, MO 631411558378216
- Veronica Kim, MDSaint Louis, MO 631411710949458
- Veronica McGregor, M.D.Saint Louis, MO 631411154395614
- Mahshid Mohseni, MDSaint Louis, MO 631411356634612
- Agusta Olafsdottir, MDSaint Louis, MO 631411699888222
- Matthew Orland, MDCreve Coeur, MO 631411659471795
- Dennis Popp, M.D.Saint Louis, MO 631411760569131
Common questions
What is Kathryn M. Diemer, MD's NPI number?
Kathryn M. Diemer, MD's National Provider Identifier (NPI) is 1891713590, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn M. Diemer, MD located?
The NPPES record lists a practice address at 10 Barnes West Dr, Saint Louis, MO, 63141. Phone: (314) 454-7775. Providers update this record themselves, so call before visiting.
How can I verify Kathryn M. Diemer, MD's license?
NPPES lists Missouri license number R1G54, 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 Kathryn M. Diemer, MD prescribe under Medicare Part D?
In 2024, Kathryn M. Diemer, MD had 164 Medicare Part D claims for 50 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Kathryn M. Diemer, MD's MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.