Joy Um, MD
NPI 1801391461 · Rheumatology Physician · Saint Louis, MO
Joy Um, MD is a Rheumatology Physician provider in Saint Louis, MO (NPI 1801391461).
Provider details
- NPI number
- 1801391461
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2022026794 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 56 | 19 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 22 | — |
| Allopurinol | 18 | — |
| Hydroxychloroquine Sulfate | 18 | — |
| Leflunomide | 17 | — |
| Methotrexate Sodiumbrand: Methotrexate | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$270 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1 Childrens Pl Msc 8116-0043-08Saint Louis, MO 63110-1002Phone: (314) 454-6124Fax: (844) 616-1418
Registry dates
- Enumerated
- 2018-03-27
- Last updated
- 2023-06-30
- Certified
- 2023-06-30
Frequently asked questions
- What is Joy Um's NPI number?
- Joy Um's National Provider Identifier (NPI) is 1801391461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joy Um's specialty?
- Joy Um is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Joy Um located?
- Joy Um's practice location on file with NPPES is 1 Barnes Jew Hosp Plz, Saint Louis, MO 63110-1003.
- What is Joy Um's phone number?
- The practice phone number listed in the NPPES registry for Joy Um is (314) 454-7279.
- Is Joy Um's NPI active?
- Yes — Joy Um's NPI (1801391461) is active in the NPPES registry as of the last update on 2023-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.