John Yoon, MD, PHD
NPI 1295856631 · Endocrinology, Diabetes & Metabolism Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Yoon, MD, PHD is a Endocrinology, Diabetes & Metabolism Physician provider in Sacramento, CA (NPI 1295856631).
Provider details
- NPI number
- 1295856631
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- L-221259 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
257 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 81 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 54 | $145 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 41 | $17 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 38 | $35 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 15 | $135 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 136 | 28 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 61 | 15 |
| Insulin Aspartbrand: Novolog Flexpen | 52 | 13 |
| Empagliflozinbrand: Jardiance | 41 | 14 |
| Metformin Hclbrand: Metformin Hcl Er | 40 | 14 |
| Dulaglutidebrand: Trulicity | 40 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-03
- Last updated
- 2018-05-03
Frequently asked questions
- What is John Yoon's NPI number?
- John Yoon's National Provider Identifier (NPI) is 1295856631, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Yoon's specialty?
- John Yoon is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Yoon located?
- John Yoon's practice location on file with NPPES is 4860 Y St, Sacramento, CA 95817-2307.
- What is John Yoon's phone number?
- The practice phone number listed in the NPPES registry for John Yoon is (617) 413-2298.
- Does John Yoon accept Medicare?
- John Yoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Yoon's NPI active?
- Yes — John Yoon's NPI (1295856631) is active in the NPPES registry as of the last update on 2018-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.