Vivienne Yoon, M.D.
NPI 1689899221 · Endocrinology, Diabetes & Metabolism Physician · Mckinney, TX
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivienne Yoon, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Mckinney, TX (NPI 1689899221).
Provider details
- NPI number
- 1689899221
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- BP10035559 (TX)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
956 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 405 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 390 | $120 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 49 | $33 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 38 | $3 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 35 | $160 |
| Hemoglobin A1c Level83036 | 20 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 537 | 148 |
| Metformin Hclbrand: Metformin Hcl Er | 169 | 64 |
| Semaglutidebrand: Ozempic | 151 | 44 |
| Levothyroxine Sodiumbrand: Synthroid | 128 | 40 |
| Empagliflozinbrand: Jardiance | 124 | 43 |
| Metformin Hcl | 104 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,279 across 74 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
Registry dates
- Enumerated
- 2007-04-17
- Last updated
- 2023-01-16
- Certified
- 2023-01-16
Frequently asked questions
- What is Vivienne Yoon's NPI number?
- Vivienne Yoon's National Provider Identifier (NPI) is 1689899221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivienne Yoon's specialty?
- Vivienne Yoon is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Vivienne Yoon located?
- Vivienne Yoon's practice location on file with NPPES is 5236 W University Dr, Mckinney, TX 75071-7889.
- What is Vivienne Yoon's phone number?
- The practice phone number listed in the NPPES registry for Vivienne Yoon is (469) 800-5400.
- Does Vivienne Yoon accept Medicare?
- Vivienne Yoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivienne Yoon's NPI active?
- Yes — Vivienne Yoon's NPI (1689899221) is active in the NPPES registry as of the last update on 2023-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.