LOUIS S LIOU M.D., PH.D.
NPI 1346212404
Urology in Cambridge, MA

Q: What is Louis Liou's NPI number?

The NPI number for Louis Liou is 1346212404. It was assigned to this individual provider in the NPPES registry on February 3, 2006.

Q: What is Louis Liou's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Q: When was this NPI record last updated?

The NPPES record for Louis Liou was last updated on September 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 03, 2006PECOS EnrolledAccepts Medicare Assignment

1493 CAMBRIDGE ST, CAMBRIDGE, MA 02139(617) 665-3590 Get Directions Write a Review

NPPES record last updated: September 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Louis S Liou M.d., Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LOUIS S LIOU M.D., PH.D. (NPI 1346212404) is an individual urology provider in Cambridge, Massachusetts, licensed in Massachusetts (216911) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Emerson Hospital -, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1346212404

Entity TypeIndividualMale

Primary Taxonomy208800000X

Provider Legal NameLOUIS S LIOUCredential: M.D., PH.D.

Location Address1493 CAMBRIDGE STCambridge, MA 02139-1047

Mailing Address1493 Cambridge StCambridge, MA 02139-1047 · (617) 665-3590

Phone(617) 665-3590

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 1996

Enumeration DateFebruary 3, 2006

Last NPPES UpdateSeptember 3, 2025

NPPES CertifiedSeptember 3, 2025

✔ NPI 1346212404 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians

Taxonomy Code208800000X

License✔ Licensed in MA · 216911

Definition

A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

1493 CAMBRIDGE ST, Cambridge, MA 02139

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Secondary Practice Locations 2

Location 141 Mall RdBurlington, MA 01805-1047 · Phone (781) 744-8000

Location 2115 Water St Ste 104Milford, MA 01757-3015 · Phone (508) 482-5411 · Fax (508) 482-5417

Other Identifiers 1

Medicaid2013592MA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health, WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Louis S Liou M.d., Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5799671467

PECOS Enrollment IDI20070822001210

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Louis Liou reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cambridge Public Health Commission

Same address

General Acute Care Hospital

1493 CAMBRIDGE ST
Cambridge, MA 02139

Reassigned Medicare billing, Massachusetts enrollment
719 clinicians in this Medicare group

NPI 1487603585 (617) 665-1000

Pratt Urology Associates, Inc

2.7 mi

Urology

800 WASHINGTON ST, BOX 1013
Boston, MA 02111

Reassigned Medicare billing, Massachusetts enrollment
10 clinicians in this Medicare group

NPI 1497795025 (617) 636-5000

Aoa Urological Associates LLC

2.8 mi

Urology

75 KNEELAND ST FL 1
Boston, MA 02111

Reassigned Medicare billing, Massachusetts enrollment

NPI 1922802438 (857) 800-2305

Steward Medical Group, Inc

4.3 mi

Specialist

9 GALEN ST
Watertown, MA 02472

Reassigned Medicare billing, Massachusetts enrollment
991 clinicians in this Medicare group

NPI 1629398219 (615) 467-4474

Lahey Clinic, Inc.

10 mi

Internal Medicine

41 MALL RD, LAHEY CLINIC
Burlington, MA 01805

Reassigned Medicare billing, Massachusetts enrollment
Also billed through NPI 1063447316 (Massachusetts)
1,574 clinicians in this Medicare group

NPI 1538194980 (781) 744-8000

Emerson Practice Associates, Inc.

15 mi

Internal Medicine

133 OLD ROAD TO NINE ACRE CORNER
Concord, MA 01742

Reassigned Medicare billing, Massachusetts enrollment
451 clinicians in this Medicare group

NPI 1508020199 (978) 287-3022

Milford Regional Physician Group, Inc.

26 mi

Internal Medicine

9 INDUSTRIAL RD, SUITE 5
Milford, MA 01757

Reassigned Medicare billing, Massachusetts enrollment
238 clinicians in this Medicare group

NPI 1902856024 (508) 473-1480

Umass Memorial Medical Group Inc

34 mi

Internal Medicine

55 LAKE AVE N
Worcester, MA 01655

Reassigned Medicare billing, Massachusetts enrollment
2,902 clinicians in this Medicare group

NPI 1760445373 (508) 334-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 22

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

141 services103 patients

Ultrasound measurement of bladder capacity after voiding 51798

Ultrasound measurement of bladder capacity after voiding is a non-invasive test that uses sound waves to create images of your bladder. It's done after you've emptied your bladder to see if there's any leftover urine, which can help diagnose certain conditions.

138 services121 patients

Urinalysis, manual test 81002

A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.

104 services89 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

71 services64 patients

Diagnostic exam of bladder and urethra using an endoscope 52000

This procedure involves using a thin, flexible tube with a light, called an endoscope, to examine the bladder and urethra. It helps in identifying any abnormalities or issues that may be causing discomfort or other symptoms.

58 services50 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

58 services51 patients

Complex measurement of pressure of urine flow in bladder with voiding pressure studies 51728

This procedure measures the pressure in your bladder as it fills and empties. It helps to understand how well your bladder is functioning. Sensors record pressure levels during these processes, providing valuable data for your doctor.

49 services48 patients

Electronic assessment of bladder emptying 51741

Electronic assessment of bladder emptying is a non-invasive test that measures how well your bladder functions. It uses ultrasound technology to create images of your bladder before and after you use the restroom, helping to identify any issues with bladder emptying.

49 services48 patients

Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings 51784

This procedure involves the use of non-invasive devices to record the electrical activity of muscles at specific body openings. It's helpful in understanding muscle function and can assist in diagnosing certain conditions.

49 services48 patients

Insertion of device into abdomen with pressure and urine flow rate study 51797

This procedure involves placing a small device into your abdomen to monitor pressure and urine flow rates. It helps in understanding how well your body is processing and eliminating liquid waste. It's a safe procedure, typically performed under local anesthesia.

49 services48 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

41 services41 patients

Electronic assessment of bladder emptying 51741

33 services28 patients

Ultrasound scan of pelvic region through rectum 76872

An ultrasound scan of the pelvic region through the rectum is a medical procedure where a small, smooth device is gently inserted into the rectum. This device uses sound waves to create images of the internal structures in the lower abdomen, aiding in diagnosis and treatment planning.

33 services33 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

33 services33 patients

Biopsy of prostate gland 55700

A biopsy of the prostate gland is a procedure where a small sample of tissue is taken from your body's internal gland, located near the bladder, for testing. This helps in diagnosing potential health issues. It's usually done with a fine needle and imaging technology for accuracy.

31 services31 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

26 services25 patients

Simple insertion of temporary bladder tube 51702

This procedure involves placing a temporary tube into your bladder to help with urine flow. It's done when the body can't naturally remove urine. The tube is inserted through a small opening and allows urine to drain into a bag. It's usually a short-term solution.

23 services14 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

21 services21 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

16 services16 patients

Destruction of prostate tissue using radiofrequency induced heated water vapor 53854

This procedure involves the use of heated water vapor to eliminate unwanted tissue in a certain region within your body. The heat is produced by radiofrequency energy. This method is less invasive, usually resulting in a quicker recovery time.

15 services15 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

15 services14 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

12 services12 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Emerson Hospital -

Acute Care Hospitals · W Concord, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220084

Location133 Old Road To 9 Acre CornerW Concord, MA 01742 · Middlesex County

Emergency services Birthing friendly

Milford Regional Medical Center

Acute Care Hospitals · Milford, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number220090

Location14 Prospect StreetMilford, MA 01757 · Worcester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02139 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ELIZABETH BLACK-SUCHY CCC-SLP

Speech-Language Pathologist