Kathy Joo, M.D.
NPI 1457318347 · Endocrinology, Diabetes & Metabolism Physician · Temecula, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathy Joo, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Temecula, CA (NPI 1457318347).
Provider details
- NPI number
- 1457318347
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A 79206 (CA)
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 tenure28% of score
20 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
205 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 | 163 | $132 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 24 | $35 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 18 | $185 |
Typical Medicare-allowed amounts for these services range $35–$185 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 233 | 69 |
| Empagliflozinbrand: Jardiance | 212 | 71 |
| Metformin Hcl | 197 | 64 |
| Rosuvastatin Calcium | 137 | 53 |
| Semaglutidebrand: Ozempic | 110 | 36 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 79 | 32 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-26
- Last updated
- 2016-06-20
Frequently asked questions
- What is Kathy Joo's NPI number?
- Kathy Joo's National Provider Identifier (NPI) is 1457318347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathy Joo's specialty?
- Kathy Joo is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Kathy Joo located?
- Kathy Joo's practice location on file with NPPES is 29645 Rancho California Rd, Temecula, CA 92591-6200.
- What is Kathy Joo's phone number?
- The practice phone number listed in the NPPES registry for Kathy Joo is (951) 308-1325.
- Does Kathy Joo accept Medicare?
- Kathy Joo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathy Joo's NPI active?
- Yes — Kathy Joo's NPI (1457318347) is active in the NPPES registry as of the last update on 2016-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.