Louis Liou, M.D., PH.D.
NPI 1346212404 · Urology Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Liou, M.D., PH.D. is a Urology Physician provider in Cambridge, MA (NPI 1346212404).
Provider details
- NPI number
- 1346212404
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 216911 (MA)
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,065 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 | 141 | $139 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 138 | $13 |
| Urinalysis, Manual Test81002 | 104 | $3 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 71 | $102 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 58 | $84 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ciprofloxacin Hcl | 71 | 66 |
| Tamsulosin Hcl | 54 | 31 |
| Finasteride | 18 | — |
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$113,874 across 32 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 (2)
- 41 Mall RdBurlington, MA 01805-1047Phone: (781) 744-8000
- 115 Water St Ste 104Milford, MA 01757-3015Phone: (508) 482-5411Fax: (508) 482-5417
Registry dates
- Enumerated
- 2006-02-03
- Last updated
- 2025-09-03
- Certified
- 2025-09-03
Frequently asked questions
- What is Louis Liou's NPI number?
- Louis Liou's National Provider Identifier (NPI) is 1346212404, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Liou's specialty?
- Louis Liou is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Liou located?
- Louis Liou's practice location on file with NPPES is 1493 Cambridge St, Cambridge, MA 02139-1047.
- What is Louis Liou's phone number?
- The practice phone number listed in the NPPES registry for Louis Liou is (617) 665-3590.
- Does Louis Liou accept Medicare?
- Louis Liou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Liou's NPI active?
- Yes — Louis Liou's NPI (1346212404) is active in the NPPES registry as of the last update on 2025-09-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.