Nathaniel Leong, M.D.
NPI 1326396664 · Family Medicine Physician · San Pedro, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Leong, M.D. is a Family Medicine Physician provider in San Pedro, CA (NPI 1326396664).
Provider details
- NPI number
- 1326396664
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A122322 (CA)
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
13 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
436 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 267 | $123 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 74 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 60 | $180 |
| Critical Care, First 30-74 Minutes99291 | 35 | $217 |
Typical Medicare-allowed amounts for these services range $120–$217 (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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Famotidine | 13 |
| Levetiracetam | 13 |
| Metoprolol Tartrate | 13 |
| Baclofen | 12 |
| Chlorhexidine Gluconate | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-08-16
- Last updated
- 2014-01-28
Frequently asked questions
- What is Nathaniel Leong's NPI number?
- Nathaniel Leong's National Provider Identifier (NPI) is 1326396664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Leong's specialty?
- Nathaniel Leong is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Leong located?
- Nathaniel Leong's practice location on file with NPPES is 1300 W 7th St, San Pedro, CA 90732-3505.
- What is Nathaniel Leong's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Leong is (310) 832-3311.
- Does Nathaniel Leong accept Medicare?
- Nathaniel Leong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Leong's NPI active?
- Yes — Nathaniel Leong's NPI (1326396664) is active in the NPPES registry as of the last update on 2014-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.