Warren Lee, MD, MHS
NPI 1942696448 · Endocrinology, Diabetes & Metabolism Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Lee, MD, MHS is a Endocrinology, Diabetes & Metabolism Physician provider in Pasadena, CA (NPI 1942696448).
Provider details
- NPI number
- 1942696448
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MHS
- Sex
- Male
- Sole proprietor
- No
- License
- A151101 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 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
1,092 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 549 | $131 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 415 | $116 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 65 | $170 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 63 | $170 |
Typical Medicare-allowed amounts for these services range $116–$170 (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 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 359 | 91 |
| Semaglutidebrand: Ozempic | 352 | 59 |
| Levothyroxine Sodium | 284 | 86 |
| Atorvastatin Calcium | 271 | 90 |
| Metformin Hcl | 219 | 74 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 198 | 67 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,305 across 48 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
- 2015-04-10
- Last updated
- 2021-09-06
- Certified
- 2021-09-06
Frequently asked questions
- What is Warren Lee's NPI number?
- Warren Lee's National Provider Identifier (NPI) is 1942696448, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Lee's specialty?
- Warren Lee is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Lee located?
- Warren Lee's practice location on file with NPPES is 2155 E Villa St, Pasadena, CA 91107-2452.
- What is Warren Lee's phone number?
- The practice phone number listed in the NPPES registry for Warren Lee is (626) 797-7470.
- Does Warren Lee accept Medicare?
- Warren Lee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Lee's NPI active?
- Yes — Warren Lee's NPI (1942696448) is active in the NPPES registry as of the last update on 2021-09-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.