Nathan Lim
NPI 1396286720 · Internal Medicine Physician · Downey, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Lim is a Internal Medicine Physician provider in Downey, CA (NPI 1396286720).
Provider details
- NPI number
- 1396286720
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
267 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 | 151 | $137 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 48 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 42 | $97 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 26 | $173 |
Typical Medicare-allowed amounts for these services range $9–$173 (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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 252 | 77 |
| Hydroxychloroquine Sulfate | 219 | 74 |
| Prednisone | 157 | 52 |
| Alendronate Sodium | 123 | 47 |
| Ibuprofen | 110 | 29 |
| Diclofenac Sodium | 108 | 60 |
| Baclofen | 90 | 40 |
| Denosumab |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$192 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
- 2017-03-18
- Last updated
- 2022-08-12
- Certified
- 2022-08-12
Frequently asked questions
- What is Nathan Lim's NPI number?
- Nathan Lim's National Provider Identifier (NPI) is 1396286720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Lim's specialty?
- Nathan Lim is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Lim located?
- Nathan Lim's practice location on file with NPPES is 11480 Brookshire Ave Ste 204, Downey, CA 90241-5023.
- What is Nathan Lim's phone number?
- The practice phone number listed in the NPPES registry for Nathan Lim is (562) 904-4466.
- Does Nathan Lim accept Medicare?
- Nathan Lim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Lim's NPI active?
- Yes — Nathan Lim's NPI (1396286720) is active in the NPPES registry as of the last update on 2022-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.