Active NPI 1346212404 Individual Practitioner Male Practitioner

Dr. Louis S Liou , MD, PhD

Urology • Cambridge, MA

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Louis Liou, MD, PhD is a certified Urology practicing in Cambridge, MA. With approximately 30 years of clinical experience since graduating from Boston University School Of Medicine in 1996, Dr. Liou delivers high-quality medical care to the local community at 1493 CAMBRIDGE ST.

Dr. Liou maintains professional affiliations with Emerson Practice Associates, Inc, Umass Memorial Medical Group Inc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, ultrasound measurement of bladder capacity after voiding, urinalysis, manual test. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1493 Cambridge St

Cambridge, MA 021391047

Telephone 6176653590

Associated Practice Facility / Clinic

🏢 Cambridge Public Health Commission Facility NPI 1487603585

Medicare Profile & Education

Medical School

Boston University School Of Medicine

Graduation Year

1996

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Urology in Cambridge, MA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

30 Yrs +1.4 yrs vs City Avg

City Avg: 28.6 Yrs

State Avg: 29.9 Yrs

Regional Practice Density

7 Specialists

Practicing in Cambridge, MA (396 Statewide)

Telehealth Adoption Rate

57.1% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

72.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Liou (30 Years) 30 Yrs

Cambridge Specialty Average (28.6 Years) 28.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	141	103	$464.66	$138.94
51798 Ultrasound measurement of bladder capacity after voiding	138	121	$46.00	$13.20
81002 Urinalysis, manual test	104	89	$10.00	$3.41
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	71	64	$449.99	$102.10
52000 Diagnostic exam of bladder and urethra using an endoscope	58	50	$284.00	$83.63
99213 Established patient office or other outpatient visit, typically 15 minutes	58	51	$327.91	$97.43
51728 Complex measurement of pressure of urine flow in bladder with voiding pressure studies	49	48	$1313.63	$404.51
51797 Insertion of device into abdomen with pressure and urine flow rate study	49	48	$702.37	$212.50
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	49	48	$283.59	$34.72
51741 Electronic assessment of bladder emptying	49	48	$65.06	$7.67
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$585.49	$137.21
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	33	33	$398.00	$86.12
51741 Electronic assessment of bladder emptying	33	28	$30.00	$4.37
76872 Ultrasound scan of pelvic region through rectum	33	33	$273.45	$33.89
55700 Biopsy of prostate gland	31	31	$457.00	$135.38
99213 Established patient office or other outpatient visit, typically 15 minutes	26	25	$320.00	$69.20
51702 Simple insertion of temporary bladder tube	23	14	$91.00	$26.25
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$405.00	$121.34
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$597.00	$172.45
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	15	14	$649.93	$195.88
53854 Destruction of prostate tissue accessed through urethra using radiofrequency generated water vapor heat therapy	15	15	$1259.00	$408.13
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	12	12	$624.92	$151.38

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
81002 Urinalysis, manual test	129	102	$43.21	$3.41
51798 Ultrasound measurement of bladder capacity after voiding	127	97	$121.58	$12.62
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	99	79	$447.75	$138.54
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	76	62	$412.53	$102.77
52000 Diagnostic exam of bladder and urethra using an endoscope	61	52	$633.13	$83.06
99213 Established patient office or other outpatient visit, typically 15 minutes	48	40	$320.19	$70.27
99213 Established patient office or other outpatient visit, typically 15 minutes	48	41	$398.21	$99.49
51797 Insertion of device into abdomen with pressure and urine flow rate study	37	36	$590.46	$186.38
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	36	36	$542.64	$141.89
51741 Electronic assessment of bladder emptying	36	34	$82.22	$6.87
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	36	35	$362.89	$30.84
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$504.97	$123.17
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	26	26	$369.31	$88.03
51741 Electronic assessment of bladder emptying	25	24	$25.92	$4.46
51702 Simple insertion of temporary bladder tube	25	11	$327.52	$26.38
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	23	23	$1413.87	$447.29
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$569.80	$181.90
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	19	17	$614.79	$195.79
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	18	17	$597.56	$152.74
51700 Simple bladder irrigation and/or instillation	18	15	$159.00	$30.75
76872 Ultrasound scan of pelvic region through rectum	14	14	$200.71	$34.22
51728 Complex measurement of pressure of urine flow in bladder with voiding pressure studies	14	14	$804.43	$244.02
55700 Biopsy of prostate gland	14	14	$791.21	$136.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	120	90	$320.68	$106.17
99213 Established patient office or other outpatient visit, typically 15 minutes	107	90	$201.70	$72.22
52000 Diagnostic exam of bladder and urethra using an endoscope	68	63	$646.29	$84.41
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	63	63	$505.62	$146.01
51741 Electronic assessment of bladder emptying	53	48	$50.64	$4.75
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	45	44	$304.16	$134.18
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	40	40	$310.20	$90.12
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	33	25	$586.03	$149.84
51797 Insertion of device into abdomen with pressure and urine flow rate study	32	32	$104.28	$42.51
51792 Assessment of muscle signal of pelvic nerves	23	23	$383.00	$28.86
51700 Simple bladder irrigation and/or instillation	23	21	$260.13	$32.69
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	22	22	$121.00	$19.90
51702 Simple insertion of temporary bladder tube	19	14	$200.21	$27.29
99442 Telephone medical discussion with physician, 11-20 minutes	13	13	$140.00	$72.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	165	124	$205.00	$109.91
99443 Telephone medical discussion with physician, 21-30 minutes	79	70	$205.00	$110.00
52000 Diagnostic exam of bladder and urethra using an endoscope	72	66	$527.00	$87.07
99213 Established patient office or other outpatient visit, typically 15 minutes	70	62	$140.00	$73.56
99442 Telephone medical discussion with physician, 11-20 minutes	56	52	$140.00	$74.66
51741 Electronic assessment of bladder emptying	41	36	$68.00	$5.06
51792 Assessment of muscle signal of pelvic nerves	30	30	$383.00	$30.93
51797 Insertion of device into abdomen with pressure and urine flow rate study	29	29	$95.00	$43.22
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	29	29	$201.00	$138.75
51702 Simple insertion of temporary bladder tube	28	11	$191.00	$27.61
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$322.00	$150.03
99441 Telephone medical discussion with physician, 5-10 minutes	16	16	$85.00	$39.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99443 Telephone medical discussion with physician, 21-30 minutes	245	186	$205.00	$86.64
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	131	107	$205.00	$86.21
52000 Diagnostic exam of bladder and urethra using an endoscope	64	58	$527.00	$87.22
99213 Established patient office or other outpatient visit, typically 15 minutes	63	56	$140.00	$56.02
99442 Telephone medical discussion with physician, 11-20 minutes	40	37	$140.00	$56.27
51741 Electronic assessment of bladder emptying	34	33	$68.00	$4.81
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	24	23	$201.00	$140.95
51797 Insertion of device into abdomen with pressure and urine flow rate study	23	22	$95.00	$44.59
51792 Assessment of muscle signal of pelvic nerves	22	22	$383.00	$30.46
51702 Simple insertion of temporary bladder tube	20	13	$191.00	$28.37
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$322.00	$141.21
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$207.00	$82.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	314	198	$205.00	$84.69
99213 Established patient office or other outpatient visit, typically 15 minutes	136	112	$140.00	$54.94
52000 Diagnostic exam of bladder and urethra using an endoscope	56	53	$527.00	$78.06
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	48	48	$322.00	$138.96
51741 Electronic assessment of bladder emptying	41	38	$68.00	$5.11
51702 Simple insertion of temporary bladder tube	38	14	$191.00	$27.74
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	30	29	$201.00	$137.90
51797 Insertion of device into abdomen with pressure and urine flow rate study	29	28	$95.00	$44.06
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$207.00	$82.09
51792 Assessment of muscle signal of pelvic nerves	17	17	$245.35	$30.21
52648 Laser vaporization of prostate including control of bleeding using an endoscope	15	15	$3355.87	$766.46
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	14	14	$123.00	$20.52

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	371	213	$205.00	$84.16
99213 Established patient office or other outpatient visit, typically 15 minutes	87	66	$140.00	$55.28
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	66	66	$322.00	$139.39
52000 Diagnostic exam of bladder and urethra using an endoscope	65	56	$527.00	$76.83
51741 Electronic assessment of bladder emptying	52	51	$68.00	$5.09
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	45	45	$201.00	$138.16
51797 Insertion of device into abdomen with pressure and urine flow rate study	43	43	$95.00	$44.01
51702 Simple insertion of temporary bladder tube	40	15	$191.00	$28.51
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	33	33	$123.00	$20.49
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$207.00	$82.70
51700 Simple bladder irrigation and/or instillation	17	12	$217.00	$33.40
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	16	$85.00	$27.45
51792 Assessment of muscle signal of pelvic nerves	11	11	$116.82	$30.17
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	11	11	$82.00	$34.83
55700 Biopsy of prostate gland	11	11	$523.00	$144.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	361	212	$205.43	$82.47
99213 Established patient office or other outpatient visit, typically 15 minutes	115	89	$138.96	$52.38
52000 Diagnostic exam of bladder and urethra using an endoscope	64	52	$519.53	$105.67
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	64	64	$325.06	$136.74
51741 Electronic assessment of bladder emptying	48	43	$93.96	$6.05
51784 Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings	25	25	$127.68	$20.84
51797 Insertion of device into abdomen with pressure and urine flow rate study	24	24	$122.50	$43.02
51729 Complex measurement of pressure of urine flow in bladder with urethra pressure and voiding pressure studies	24	24	$209.38	$135.62
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	22	22	$207.14	$80.66
55700 Biopsy of prostate gland	14	14	$523.00	$140.55
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	14	14	$75.71	$34.24
51700 Simple bladder irrigation and/or instillation	12	12	$210.83	$39.21

Medical Specialties & State Licenses

CMS Verified: 2025-09-03

Urology Primary Specialty

NUCC Taxonomy Code: 208800000X

State License MA 216911

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

2013592 (MA)

Hospital & Practice Group Affiliations

Emerson Practice Associates, Inc

133 Old Rd To 9 Acre Cor, Concord, MA 017424159

Phone: 9782873020

Emerson Practice Associates, Inc

133 Old Rd To Nine Acre Corner, Concord, MA 017424159

Umass Memorial Medical Group Inc

115 Water St, Milford, MA 017573015

Phone: 5084825411

Secondary Practice Locations

115 Water St Ste 104

Milford, MA 017573015

Phone: 5084825411

41 Mall Rd

Burlington, MA 018051047

Phone: 7817448000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Dr. Zachary Oliff , DO

Emergency Medicine

NPI 1003300492

Doctor of Osteopathic Medicine (D.O.)

Jacob Wolfe , LICSW

Social Worker - Clinical

NPI 1003315938

Licensed Independent Clinical Social Worker

Sarah-Jo Santilli , RN

Registered Nurse

NPI 1003380239

Registered Nurse

Julie Mercer

Registered Nurse

NPI 1003386731

Taiana Katsaras , LICSW

Social Worker - Clinical

NPI 1003461765

Licensed Independent Clinical Social Worker

Angela De Silva

Registered Nurse - Ambulatory Care

NPI 1003522863

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active December 09, 2011

NPI status registered as active in NPPES database

📍

Updated Practice Location December 09, 2011

Registered at 1493 CAMBRIDGE ST, CAMBRIDGE, MA 021391047 (Tel: 6176653590)

📍

Updated Business Mailing Address December 09, 2011

Registered at 1493 CAMBRIDGE ST, CAMBRIDGE, MA 021391047 (Tel: 6176653590)

👤

Provider Name / Credentials Updated December 09, 2011

Recorded as LOUIS LIOU, M.D., PH.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 09, 2011

Urology (License #216911 in MA)

🟢

Initial NPI Registration & Enumeration February 03, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1346212404

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: February 03, 2006

Last Update: September 03, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1493 Cambridge St

Cambridge, MA 021391047

Phone: 6176653590

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.