Nathaniel Liu, MD
NPI 1598955783 · Vascular Surgery Physician · Louisville, KY
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Liu, MD is a Vascular Surgery Physician provider in Louisville, KY (NPI 1598955783).
Provider details
- NPI number
- 1598955783
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 47260 (KY)
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
18 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
2,310 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) |
|---|---|---|
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 314 | $21 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 290 | $32 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 213 | $125 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 196 | $38 |
| Ultrasound Study of Arm and Leg Arteries93922 | 172 | $12 |
| 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 |
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) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 82 | 42 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 67 | 58 |
| Apixabanbrand: Eliquis | 28 | — |
| Ticagrelorbrand: Brilinta | 13 | — |
| Cilostazol | 12 | — |
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 , 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,251 across 26 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
- 2007-07-25
- Last updated
- 2021-01-19
- Certified
- 2021-01-19
Frequently asked questions
- What is Nathaniel Liu's NPI number?
- Nathaniel Liu's National Provider Identifier (NPI) is 1598955783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Liu's specialty?
- Nathaniel Liu is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Liu located?
- Nathaniel Liu's practice location on file with NPPES is 3 Audubon Plaza Dr Ste 220, Louisville, KY 40217-1319.
- What is Nathaniel Liu's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Liu is (502) 636-7242.
- Does Nathaniel Liu accept Medicare?
- Nathaniel Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Liu's NPI active?
- Yes — Nathaniel Liu's NPI (1598955783) is active in the NPPES registry as of the last update on 2021-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.