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DR. CHARLES YIN-YAT LO MD
NPI 1811978604
Surgery in San Francisco, CA

Active since November 08, 2005PECOS EnrolledAccepts Medicare Assignment
818 JACKSON STREET, SUITE 102, SAN FRANCISCO, CA 94133(415) 391-9993(415) 291-9993 Get Directions Write a Review

NPPES record last updated: October 29, 2024. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Dr. Charles Yin-yat Lo Md NPPES

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

DR. CHARLES YIN-YAT LO MD (NPI 1811978604) is an individual surgery provider in San Francisco, California, licensed in California (00A519440) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1967).

NPPES Registry Identity

NPI1811978604
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. CHARLES YIN-YAT LOCredential: MD
Location Address818 JACKSON STREET, SUITE 102San Francisco, CA 94133-4849
Mailing Address818 Jackson St Ste 102San Francisco, CA 94133-4849 · (415) 391-9993 · Fax (415) 291-9993
Phone(415) 391-9993
Fax(415) 291-9993
Sole ProprietorYes
Medical School CMSOtherGraduated 1967
Enumeration DateNovember 8, 2005
Last NPPES UpdateOctober 29, 2024
NPPES CertifiedOctober 29, 2024
✔ NPI 1811978604 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · 00A519440
Definition
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.
818 JACKSON STREET, San Francisco, CA 94133
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Other Identifiers 1

Medicaid00A519440CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Charles Yin-yat Lo Md 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 ID9436111457
PECOS Enrollment IDI20041102000513
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.

Areas of Expertise CMS Part B claims 4

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 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.
75 services54 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.
43 services43 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.
24 services24 patients
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.
13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94133 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Perioperative Care: Selection of Prophylactic Antibiotic - First OR Second Generation Cephalosporin
Percentage of surgical patients aged 18 years and older undergoing procedures with the indications for a first OR second generation cephalosporin prophylactic antibiotic, who had an order for a first OR second generation cephalosporin for antimicrobial…
100%22 patients
Perioperative Care: Venous Thromboembolism (VTE) Prophylaxis (When Indicated in ALL Patients)
Percentage of surgical patients aged 18 years and older undergoing procedures for which venous thromboembolism (VTE) prophylaxis is indicated in all patients, who had an order for Low Molecular Weight Heparin (LMWH), Low- Dose Unfractionated Heparin (LDUH)…
100%23 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Charles Lo's NPI number?

The NPI number for Charles Lo is 1811978604. It was assigned to this individual provider in the NPPES registry on November 8, 2005.

Where is Charles Lo located?

Charles Lo practices at 818 Jackson Street Suite 102, San Francisco, CA 94133. The listed phone number is (415) 391-9993.

What is Charles Lo's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Charles Lo enrolled in Medicare?

Yes. Charles Lo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Charles Lo was last updated on October 29, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.