John Lee, MD
NPI 1598721284 · Internal Medicine Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Lee, MD is a Internal Medicine Physician provider in Fullerton, CA (NPI 1598721284).
Provider details
- NPI number
- 1598721284
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A66137 (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
20 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
2,846 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 | 799 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 642 | $98 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 558 | $9 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 279 | $55 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 133 | $54 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 184 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 2,745 | 736 |
| Losartan Potassium | 1,372 | 335 |
| Amlodipine Besylate | 1,245 | 301 |
| Rosuvastatin Calcium | 648 | 193 |
| Alendronate Sodium | 527 | 165 |
| Metformin Hcl | 516 | 148 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$156 across 2 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
- 2006-04-22
- Last updated
- 2010-10-29
Frequently asked questions
- What is John Lee's NPI number?
- John Lee's National Provider Identifier (NPI) is 1598721284, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Lee's specialty?
- John Lee is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Lee located?
- John Lee's practice location on file with NPPES is 400 N. Euclid St, Fullerton, CA 91748-1625.
- What is John Lee's phone number?
- The practice phone number listed in the NPPES registry for John Lee is (626) 964-3326.
- Does John Lee accept Medicare?
- John Lee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Lee's NPI active?
- Yes — John Lee's NPI (1598721284) is active in the NPPES registry as of the last update on 2010-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.