Active NPI 1811978604 Individual Practitioner Male Practitioner

Dr. Charles Yin-Yat Lo , MD

Surgery • San Francisco, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Charles Lo, MD is a certified Surgery practicing in San Francisco, CA. With approximately 59 years of clinical experience since completing medical education in 1967, Dr. Lo delivers high-quality medical care to the local community at 818 JACKSON STREET.

Dr. Lo accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit, repair of groin hernia (5 years or older). Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

818 Jackson Street
Suite 102

San Francisco, CA 941334849

Telephone 4153919993

Fax 4152919993

Medicare Profile & Education

Medical School

Other

Graduation Year

1967

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in San Francisco, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

59 Yrs +35.4 yrs vs City Avg

City Avg: 23.6 Yrs

State Avg: 27.4 Yrs

Regional Practice Density

207 Specialists

Practicing in San Francisco, CA (3346 Statewide)

Telehealth Adoption Rate

19.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

38.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Lo (59 Years) 59 Yrs

San Francisco Specialty Average (23.6 Years) 23.6 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
99213 Established patient office or other outpatient visit, typically 15 minutes	75	54	$175.00	$109.41
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	43	43	$250.00	$133.08
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	24	24	$300.00	$197.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	11	$246.15	$153.47

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	107	68	$175.00	$107.20
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	71	71	$250.00	$132.26
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	26	26	$300.00	$194.17
49505 Repair of groin hernia (5 years or older)	12	12	$1625.00	$605.94
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$275.00	$144.31

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	101	75	$175.00	$106.87
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	88	88	$250.00	$131.00
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$300.00	$193.23
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	12	12	$233.33	$150.89
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$275.00	$149.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	123	77	$175.00	$108.42
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	93	93	$250.00	$132.55
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	25	25	$300.00	$195.98

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	85	61	$175.00	$89.58
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	49	49	$250.00	$127.86
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	31	11	$200.00	$81.81
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$175.00	$90.84
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	11	$275.00	$155.21
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$300.00	$192.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	121	84	$175.00	$87.12
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	93	93	$250.00	$125.73
99202 New patient office or other outpatient visit, typically 20 minutes	18	18	$175.00	$90.81
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$300.00	$190.09
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	14	14	$1000.00	$210.62
49505 Repair of groin hernia (5 years or older)	14	14	$1500.00	$579.62
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$275.00	$152.03
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	12	12	$1100.00	$291.09

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	126	95	$175.00	$85.97
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	82	82	$250.00	$126.27
99202 New patient office or other outpatient visit, typically 20 minutes	38	38	$175.00	$89.22
45384 Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery	20	20	$1100.00	$164.21
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$300.00	$189.69
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	12	12	$1000.00	$210.55

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	135	93	$175.00	$87.00
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	78	78	$250.00	$127.83
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	40	11	$200.00	$81.10
99202 New patient office or other outpatient visit, typically 20 minutes	36	36	$175.00	$89.77
45384 Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery	28	27	$1100.00	$177.50
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	20	15	$125.00	$52.94
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	19	19	$300.00	$190.72
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	19	18	$1000.00	$206.81
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	18	16	$200.00	$127.31
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	17	16	$275.00	$152.84
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	14	14	$1100.00	$293.90
43246 Insertion of stomach tube using a flexible endoscope	13	13	$500.00	$142.97

Medical Specialties & State Licenses

CMS Verified: 2024-10-29

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License CA 00A519440

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00A519440 (CA)

Practice Associates & Co-Workers

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

1 Associated Practitioners

Dr. Josephine Mak , MD

Family Medicine

NPI 1467521070

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location October 29, 2024

Registered at 818 JACKSON STREET, SUITE 102, SAN FRANCISCO, CA 941334849 (Tel: 4153919993)

📍

Updated Business Mailing Address October 29, 2024

Registered at 818 JACKSON ST STE 102, SAN FRANCISCO, CA 941334849 (Tel: 4153919993)

✅

NPI Profile Active July 16, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 16, 2007

Registered at 890 JACKSON ST, SUITE 302, SAN FRANCISCO, CA 941334867 (Tel: 4153919993)

📍

Updated Business Mailing Address July 16, 2007

Registered at 890 JACKSON ST, SUITE 302, SAN FRANCISCO, CA 941334867 (Tel: 4153919993)

👤

Provider Name / Credentials Updated July 16, 2007

Recorded as CHARLES LO, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 16, 2007

Surgery (License #00A519440 in CA)

🟢

Initial NPI Registration & Enumeration November 08, 2005

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: 1811978604

Entity Type:

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

Enumeration Date: November 08, 2005

Last Update: October 29, 2024

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

818 Jackson St Ste 102

San Francisco, CA 941334849

Phone: 4153919993

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.