NPPES file of Aug 9, 2026

Joy Minjeong Um, MD

Pediatric Rheumatology Physician · Saint Louis, MO

Joy Minjeong Um, MD is a pediatric rheumatology physician with a practice address in Saint Louis, Missouri, and NPI 1801391461, issued on Mar 27, 2018. Check the license (Missouri 2022026794, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801391461
Name
Joy Minjeong Um
Credential
MD
Primary taxonomy
Pediatric Rheumatology Physician 2080P0216X
License number
2022026794 MO
Self-reported in NPPES; status is on the state search
Practice location
1 Childrens PL, Saint Louis, MO 63110
Phone
(314) 454-6124
Enumerated
Mar 27, 2018
Record last updated
Jul 28, 2026
Fax
(844) 616-1418
Medicaid ID
830147177 MO
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatric rheumatology physician records → All 29 in Missouri → Look up another NPI →

Also registered at 1 Childrens PL

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mohamed Abdelbaki, MDPediatric Hematology & Oncology Physician1508021361
  2. Christi Abeln, PNPPediatric Nurse Practitioner1023034253
  3. Loren Abernathy, PNPPediatric Nurse Practitioner1215583117
  4. Freddy-May Abisamra, CGCGenetic Counselor (M.S.)1306538111
  5. Manjusha Abraham, MDPediatric Critical Care Medicine Physician1508126699
  6. Philip Abraham, MDHospitalist Physician1720309016

Verify Joy Minjeong Um in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2022026794    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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60% more Medicare Part D claims than the average pediatric rheumatology physician in 2024

239 Medicare Part D claims for 41 beneficiaries, against an average of 149 among the 71 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.

  1. Joy Um239
  2. Specialty average149

Most prescribed

  1. Prednisone56 claims
  2. Sulfamethoxazole-Trimethoprim22 claims
  3. Allopurinol18 claims
  4. Hydroxychloroquine Sulfate18 claims
  5. Leflunomide17 claims
  6. Methotrexate11 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: $269.97

4 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 185 providers of this specialty with any payment received $2,646.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Joy Um$269.97
  2. Specialty average$2,646.07

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Joy Minjeong Um among 29 pediatric rheumatology physician records in Missouri

Joy Minjeong Um, MD is one of 29 pediatric rheumatology physician records with a practice address in Missouri. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 86% of them.

  • NPI issued2018 · 86% of these records are older, 3% newer
  • In a Medicare fileYes · 52% of these records are
  • In the CMS Doctors and Clinicians fileNo · 24% of these records are
  • Record last updated2026 · 28% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0216X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Rheumatology Physician providers in Missouri

There are 29 pediatric rheumatology physician records in Missouri.

All 29 in Missouri → Every provider in Saint Louis → Pediatric Rheumatology Physician nationwide →

The 8 pediatric rheumatology physician records with the nearest ZIP codes

  1. Kevin Baszis, MDSaint Louis, MO 631101366628349
  2. Tarin Bigley, MDSaint Louis, MO 631101912357989
  3. Megan Cooper, MDSaint Louis, MO 631101245405604
  4. Leslie Fogel, MDSaint Louis, MO 631101972953115
  5. Lampros Fotis, MDSaint Louis, MO 631101417381237
  6. Anthony French, MDSaint Louis, MO 631101528084746
  7. Rachel Guess, MDSaint Louis, MO 631101629566278
  8. Maleewan Kitcharoensakkul, MDSaint Louis, MO 631101609031558

Common questions

What is Joy Minjeong Um, MD's NPI number?

Joy Minjeong Um, MD's National Provider Identifier (NPI) is 1801391461, issued on Mar 27, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Joy Minjeong Um, MD located?

The NPPES record lists a practice address at 1 Childrens PL, Saint Louis, MO, 63110. Phone: (314) 454-6124. Providers update this record themselves, so call before visiting.

How can I verify Joy Minjeong Um, MD's license?

NPPES lists Missouri license number 2022026794, 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 Joy Minjeong Um, MD prescribe under Medicare Part D?

In 2024, Joy Minjeong Um, MD had 239 Medicare Part D claims for 41 beneficiaries; the average among pediatric rheumatology physician prescribers was 149. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.