LAWRENCE L. CHAO M.D.
NPI 1700896370
Internal Medicine in San Francisco, CA

NPI Status: Active since August 08, 2006

Contact Information

2645 OCEAN AVE
SUITE 207
SAN FRANCISCO, CA
ZIP 94132
Phone: (415) 333-3302
Fax: (415) 333-3091

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  • Individual
  • Male
  • Years of Experience 41
  • Internal Medicine
  • Accepts Medicare Approved Payment
  • PECOS Enrolled
  • CLIA Number: 05D0971730
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 03-19-2026

About LAWRENCE CHAO

This page provides the complete NPI Profile along with additional information for Lawrence Chao, an internist established in San Francisco, California with a medical specialization in Internal Medicine and more than 41 years of experience. The healthcare provider is registered in the NPI registry with number 1700896370 assigned on August 2006. The practitioner's primary taxonomy code is 207R00000X with license number A55511 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1700896370
Provider Name
LAWRENCE L. CHAO M.D.
Gender
Male
Entity Type
Individual
Location Address
2645 OCEAN AVE SUITE 207 SAN FRANCISCO, CA 94132
Location Phone
(415) 333-3302
Location Fax
(415) 333-3091
Mailing Address
2645 OCEAN AVE SUITE 207 SAN FRANCISCO, CA 94132
Mailing Phone
(415) 333-3302
Mailing Fax
(415) 333-3091
Medical School Name
OTHER
Graduation Year
1985
Is Sole Proprietor?
Yes
Enumeration Date
08-08-2006
Last Update Date
07-08-2007
Code Navigator

An internist like Lawrence Chao is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
A55511
License State
CA
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Medicare Participation & PECOS Enrollment Status

Lawrence Chao is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Lawrence Chao is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 648430850

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20120326000788

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Other DME (DE017N)

    Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips (HCPCS:A4253)

    5 DME suppliers used 12 Medicare Claims 30 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Acupuncture with electrical stimulation, each additional 15 minutes

Acupuncture with electrical stimulation involves inserting thin needles into specific points on your body. A mild electrical current is then passed through these needles for a set time, often 15 minutes. This can enhance the effects of traditional acupuncture, helping to relieve pain and promote healing.

This service was performed 118 times for 23 patients

Acupuncture with electrical stimulation, initial 15 minutes

Acupuncture with electrical stimulation is a therapy where thin needles are inserted into specific points on your body. A mild electrical current is then passed through the needles to stimulate these points, helping to alleviate pain and promote healing. This initial session lasts 15 minutes.

This service was performed 118 times for 23 patients

Adm sarscov2 50mcg/0.25mlbst

This procedure involves administering a dose of a SARS-CoV-2 vaccine. The specific dosage is 50 micrograms in a 0.25 milliliter booster shot. This vaccine helps your body build immunity against the COVID-19 virus. It's a key part of global efforts to control the pandemic.

This service was performed 12 times for 12 patients

Adm sarscv2 30mcg trs-sucr b

This service involves the administration of a 30mcg dose of the SARS-CoV-2 vaccine, which helps protect against COVID-19. The 'trs-sucr b' indicates it's stabilized with sugars for effectiveness. It's a crucial step in maintaining your health during the pandemic.

This service was performed 13 times for 13 patients

Administration of influenza virus vaccine

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

This service was performed 53 times for 53 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

This service was performed 94 times for 94 patients

Application of low energy heat

Application of low energy heat is a therapeutic procedure that involves gently warming a specific area of your body. This process can help increase blood flow, promote healing, and reduce discomfort. It's a non-invasive, safe method often used to manage chronic pain or muscle tension.

This service was performed 129 times for 23 patients

Coronavirus vaccine 13

The "Coronavirus Vaccine 13" isn't a recognized term. However, COVID-19 vaccines help protect against the virus by triggering an immune response. They teach your body how to fight the virus if exposed, reducing the risk of severe illness. It's crucial for public health and safety.

This service was performed 11 times for 11 patients

Coronavirus vaccine 14

The Coronavirus Vaccine 14 is an injection designed to protect you from COVID-19. It works by teaching your immune system how to fight the virus. After vaccination, your body is better equipped to combat the virus if exposed, reducing your risk of severe illness. It's a key step in controlling the pandemic.

This service was performed 14 times for 14 patients

Established patient office or other outpatient visit, 10-19 minutes

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

This service was performed 128 times for 35 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 332 times for 133 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 236 times for 125 patients

Fee covid-19 vac 13 res

The "Fee Covid-19 Vac 13 Res" service refers to a charge for the 13th dose of the Covid-19 vaccine, typically for individuals requiring additional doses due to specific health conditions. It's crucial to follow your healthcare provider's advice for your health safety.

This service was performed 12 times for 12 patients

Fee covid-19 vac 14 res

The "Fee covid-19 vac 14 res" refers to a charge for a specific service related to the COVID-19 vaccine. This could be for administering the vaccine or related care. It's crucial to get vaccinated to protect against the virus. The fee ensures quality service.

This service was performed 13 times for 13 patients

Influenza vaccine, quadrivalent derived from cell cultures

The quadrivalent influenza vaccine, derived from cell cultures, is a flu shot that protects against four different flu viruses. It's made in labs using cell cultures instead of eggs, making it a good option for those with egg allergies. It's a crucial tool in preventing the flu.

This service was performed 24 times for 24 patients

Influenza vaccine, quadrivalent, 0.5 ml dosage

The Influenza vaccine, quadrivalent, 0.5 ml dosage, is a flu shot to protect against four strains of the flu virus. It's given as a small injection, typically in the arm, to help your body build immunity and fight off potential flu infections.

This service was performed 26 times for 26 patients

Insertion of needle into vein for collection of blood sample

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

This service was performed 54 times for 42 patients

New patient office or other outpatient visit, 30-44 minutes

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.

This service was performed 21 times for 21 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 12 times for 12 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

This service was performed 13 times for 13 patients

Sarscov2 vac 30 mcg trs-sucr

The Sarscov2 vac 30 mcg trs-sucr is a COVID-19 vaccine. It's designed to help your body develop immunity against the SARS-CoV-2 virus, which causes COVID-19. The vaccine stimulates your immune system to recognize and fight the virus without causing the disease.

This service was performed 12 times for 12 patients

Sarscov2 vac 50mcg/0.25ml im

The Sarscov2 vac 50mcg/0.25ml im is a COVID-19 vaccine. It's administered as an intramuscular injection, typically in the arm. The vaccine helps your body develop immunity to the virus, reducing your risk of severe illness.

This service was performed 12 times for 12 patients

Therapy procedure using massage, each 15 minutes

This therapy involves the application of pressure to your body's soft tissues using hands. It helps alleviate pain, reduce stress, and promote relaxation. Each session lasts for 15 minutes and can be tailored to your specific needs.

This service was performed 130 times for 23 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $38.45 for a new patient copayment and $29.87 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 94132 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $153.83
  • Minimum New Patient Price $69
  • Maximum New Patient Price $202.35
  • Average New Patient Copayment $38.45
  • Minimum New Patient Copayment $17.25
  • Maximum New Patient Copayment $50.58

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $119.48
  • Minimum Established Patient Price $23.44
  • Maximum Established Patient Price $166.46
  • Average Established Patient Copayment $29.87
  • Minimum Established Patient Copayment $5.86
  • Maximum Established Patient Copayment $41.61

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
05D0971730
Facility Type
Physician Office
Certificate Effective Date
March 20, 2024
Certificate Expiration Date
March 19, 2026
Laboratory Director
LAWRENCE L. CHAO, MD
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Lawrence Chao to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1700896370, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
7
Unchanged
Pos 3
0
Doubled → 0
Pos 4
0
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
9
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
3
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
0
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 0 → 0 8 → 16 → 7 6 → 12 → 3 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 7 + 0 + 0 + 1 + 6 + 9 + 1 + 2 + 3 + 1 + 4 + 24 = 60

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1700896370.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Obstetrics & Gynecology
2645 OCEAN AVE, STE 309
SAN FRANCISCO, CA 94132
Family Medicine
2645 OCEAN AVE, SUITE 303
SAN FRANCISCO, CA 94132
Family Medicine
2645 OCEAN AVE, SUITE 303
SAN FRANCISCO, CA 94132
General Practice
2645 OCEAN AVE, SUITE 209
SAN FRANCISCO, CA 94132
Technician/Technologist (Optician)
2645 OCEAN AVE, SUITE #2
SAN FRANCISCO, CA 94132
Clinic/Center (Medical Specialty)
2645 OCEAN AVE, 301
SAN FRANCISCO, CA 94132
Dentist (General Practice)
2645 OCEAN AVE, SUITE 203
SAN FRANCISCO, CA 94132
Marriage & Family Therapist
2645 OCEAN AVE, SUITE 206
SAN FRANCISCO, CA 94132
Internal Medicine (Hematology & Oncology)
2645 OCEAN AVE, SUITE 305
SAN FRANCISCO, CA 94132
Internal Medicine
2645 OCEAN AVE, SUITE 301
SAN FRANCISCO, CA 94132
Marriage & Family Therapist
2645 OCEAN AVE, SUITE # 206
SAN FRANCISCO, CA 94132
Pediatrics
2645 OCEAN AVE, #104
SAN FRANCISCO, CA 94132
Physician Assistant
2645 OCEAN AVE, #303
SAN FRANCISCO, CA 94132
Surgery
2645 OCEAN AVE, SUITE 307
SAN FRANCISCO, CA 94132
Dentist
2645 OCEAN AVE, SUITE 203
SAN FRANCISCO, CA 94132
Technician/Technologist (Optician)
2645 OCEAN AVE, SUITE 2
SAN FRANCISCO, CA 94132
Clinic/Center (Primary Care)
2645 OCEAN AVE, SUITE 207
SAN FRANCISCO, CA 94132
Dentist (General Practice)
2645 OCEAN AVE, SUITE 210
SAN FRANCISCO, CA 94132
Marriage & Family Therapist
2645 OCEAN AVE, SUITE 206
SAN FRANCISCO, CA 94132
Dentist
2645 OCEAN AVE, SUITE 306
SAN FRANCISCO, CA 94132

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1700896370, enumerated as an "individual" on August 08, 2006.

The provider is located at 2645 OCEAN AVE SUITE 207 SAN FRANCISCO, CA 94132 and the phone number is (415) 333-3302.

Internal Medicine with taxonomy code 207R00000X.