Nancy Hsu, MD
NPI 1265789960 · Sleep Medicine (Internal Medicine) Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Hsu, MD is a Sleep Medicine (Internal Medicine) Physician provider in La Jolla, CA (NPI 1265789960).
Provider details
- NPI number
- 1265789960
- Entity type
- Individual
- Primary specialty
- Sleep Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A126662 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,555 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 | 785 | $137 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 611 | $17 |
| Sleep Study Including Heart Rate, Breathing, and Sleep Time95800 | 376 | $116 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 248 | $177 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 220 | $190 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 231 | 56 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 146 | 57 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 116 | 30 |
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 100 | 24 |
| Gabapentin | 100 | 28 |
| Fluticasone Propionate | 72 | 32 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,421 across 57 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
Additional practice locations (1)
- 10833 Le Conte Ave37-131 ChsLos Angeles, CA 90095-3075Phone: (310) 825-5615
Registry dates
- Enumerated
- 2012-08-13
- Last updated
- 2019-12-18
- Certified
- 2019-12-18
Frequently asked questions
- What is Nancy Hsu's NPI number?
- Nancy Hsu's National Provider Identifier (NPI) is 1265789960, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Hsu's specialty?
- Nancy Hsu is listed in the NPPES registry with a primary specialty of Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Hsu located?
- Nancy Hsu's practice location on file with NPPES is 10666 N Torrey Pines Rd, La Jolla, CA 92037-1027.
- What is Nancy Hsu's phone number?
- The practice phone number listed in the NPPES registry for Nancy Hsu is (858) 554-8860.
- Does Nancy Hsu accept Medicare?
- Nancy Hsu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Hsu's NPI active?
- Yes — Nancy Hsu's NPI (1265789960) is active in the NPPES registry as of the last update on 2019-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.