DR. LAWRENCE C CHAO MD
NPI 1700812997
Ophthalmology - Cornea and External Diseases Specialist in Irvine, CA


Quality Rating: 94.05 out of 100 score

NPI Status: Active since June 23, 2006

Contact Information

2500 ALTON PKWY
SUITE 102
IRVINE, CA
ZIP 92606
Phone: (949) 679-2426
Fax: (949) 679-2616

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  • Individual
  • Male
  • Years of Experience 33
  • Ophthalmology
  • Cornea and External Diseases Specialist
  • Accepts Medicare Approved Payment
  • PECOS Enrolled
  • Medicare Quality Reporting

About LAWRENCE CHAO

This page provides the complete NPI Profile along with additional information for Lawrence Chao, a provider established in Irvine, California with a medical specialization in Ophthalmology, focusing in cornea and external diseases specialist and more than 33 years of experience. He graduated from University Of Southern California Keck School Of Medicine in 1993. The healthcare provider is registered in the NPI registry with number 1700812997 assigned on June 2006. The practitioner's primary taxonomy code is 207WX0120X with license number G84067 (CA). The provider is registered as an individual and his NPI record was last updated 3 years ago.

NPI
1700812997
Provider Name
DR. LAWRENCE C CHAO MD
Gender
Male
Entity Type
Individual
Location Address
2500 ALTON PKWY SUITE 102 IRVINE, CA 92606
Location Phone
(949) 679-2426
Location Fax
(949) 679-2616
Mailing Address
2500 ALTON PKWY STE 102 IRVINE, CA 92606
Mailing Phone
(949) 679-2426
Mailing Fax
(949) 679-2616
Medical School Name
UNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduation Year
1993
Is Sole Proprietor?
No
Enumeration Date
06-23-2006
Last Update Date
03-23-2022
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Location Map

Secondary Locations

  • 1955 Sunny Crest Dr Ste 120
    Fullerton, CA 92835
    (949) 679-2426

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

Ophthalmology Cornea and External Diseases Specialist

Taxonomy Code
207WX0120X
Type
Allopathic & Osteopathic Physicians
License No.
G84067
License State
CA
Taxonomy Description
An ophthalmologist who specializes in diseases of the cornea, sclera, eyelids, conjunctiva, and anterior segment of the eye.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207W00000XAllopathic & Osteopathic Physicians

Ophthalmology

G84067 (CA)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
00G840670OTHER (01)CAMEDI-CAL PROVIDER #

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: 42215659

    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: I20061003000277

    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)

    4 DME suppliers used 14 Medicare Claims 46 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.

Cataract surgery

Cataract surgery is a procedure to remove the lens of your eye when it becomes cloudy, which is called a cataract. A synthetic lens is then inserted to restore clear vision. The operation is typically done on an outpatient basis and is very safe and effective.

This service was performed for 306 patients

Established patient complete exam of visual system

An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.

This service was performed 260 times for 254 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 136 times for 121 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 494 times for 427 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 159 times for 109 patients

Established patient problem focused exam of visual system

This is a routine check-up for existing patients focusing on the visual system. It involves examining your eyes to detect any potential issues or changes in your vision. It's a crucial part of maintaining good eye health.

This service was performed 37 times for 35 patients

Imaging of optic nerve

Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).

This service was performed 113 times for 99 patients

Imaging of retina

Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.

This service was performed 96 times for 92 patients

Measurement of corneal curvature and depth of eye

This procedure measures the shape and depth of your eye, specifically the cornea, the clear front surface. It helps in diagnosing conditions, planning for surgeries, or fitting contact lenses. It's non-invasive and painless.

This service was performed 142 times for 142 patients

New patient complete exam of visual system

A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.

This service was performed 37 times for 37 patients

New patient office or other outpatient visit, 15-29 minutes

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

This service was performed 18 times for 18 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 89 times for 89 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 60 times for 60 patients

Removal of cataract with insertion of prosthetic lens

This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.

This service was performed 217 times for 132 patients

Removal of recurring cataract in lens capsule using a laser

This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.

This service was performed 67 times for 63 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $35.59 for a new patient copayment and $19.49 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 92606 ZIP code area.

New Patients Visit Costs *

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

  • Average New Patient Price $142.39
  • Minimum New Patient Price $62.96
  • Maximum New Patient Price $187.6
  • Average New Patient Copayment $35.59
  • Minimum New Patient Copayment $15.74
  • Maximum New Patient Copayment $46.9

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $77.96
  • Minimum Established Patient Price $20.84
  • Maximum Established Patient Price $153.61
  • Average Established Patient Copayment $19.49
  • Minimum Established Patient Copayment $5.21
  • Maximum Established Patient Copayment $38.4

* 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.

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 94.05, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance. The provider also has detailed performance information the following quality measures: .

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 94.05 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: N/A

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 93

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

MIPS Quality Measures

The following performance measures were reported under the Merit-Based Incentive Payment System (MIPS) and Qualified Clinical Data Registry (QCDR) quality measures program.

Quality Measure Performance Number of Patients
e-Prescribing 99% 342
Provide Patients Electronic Access to Their Health Information 87% 622

Reviews for DR. LAWRENCE C CHAO MD

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1700812997
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
27001614918
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 7 + 0 + 0 + 1 + 6 + 1 + 4 + 9 + 1 + 8 + 24 = 63
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 63 = 77

The NPI number 1700812997 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 17 providers are registered at the same or nearby location.

DR. ALI REZA MANSOURI DDS

Dentist

2500 ALTON PKWY
SUITE 200
IRVINE, CA
ZIP 92606

(949) 748-7373

AMIR ESFANDIARI DDS, INC

Dentist

2500 ALTON PKWY
SUITE 203
IRVINE, CA
ZIP 92606

(949) 861-2500

DR. AMIR MEHDI NOORI-ESFANDIARI DDS

Dentist

(General Practice)

2500 ALTON PKWY
SUITE 203
IRVINE, CA
ZIP 92606

(949) 861-2500

DR. ROXANNA BAGHAI DDS

Dentist

(General Practice)

2500 ALTON PKWY
SUITE 110
IRVINE, CA
ZIP 92606

(949) 679-4100

I LANE WONG M.D.

Specialist

2500 ALTON PKWY
STE. 201
IRVINE, CA
ZIP 92606

(949) 387-3888

DR. PATRICK WAH LEE D.D.S

Dentist

(Pediatric Dentistry)

2500 ALTON PKWY
SUITE 206
IRVINE, CA
ZIP 92606

(949) 833-7888

DR. FAY MANSOURI D.D.S.

Dentist

2500 ALTON PKWY
SUITE 202
IRVINE, CA
ZIP 92606

(949) 622-0055

PATRICK W LEE DENTAL CORPORATION

Dentist

(Pediatric Dentistry)

2500 ALTON PKWY
SUITE 206
IRVINE, CA
ZIP 92606

(949) 833-7888

BANGSUN JUSTIN KIM M.D., INC.

Internal Medicine

2500 ALTON PKWY
SUITE 108
IRVINE, CA
ZIP 92606

(949) 552-8282

D&D HEALTH CONCEPTS

Acupuncturist

2500 ALTON PKWY
STE 208
IRVINE, CA
ZIP 92606

(949) 748-6220

THANG PHAM M.D, INC

Internal Medicine

2500 ALTON PKWY
SUITE 100
IRVINE, CA
ZIP 92606

(949) 252-8822

ADVANCED WOMEN CARE MEDICAL CORPORATION

Obstetrics & Gynecology

2500 ALTON PKWY
100
IRVINE, CA
ZIP 92606

(949) 261-7546

DR. ZOYA SKY D.D.S.

Dentist

(General Practice)

2500 ALTON PKWY
SUITE 203
IRVINE, CA
ZIP 92606

(949) 861-2500

DR. SHIRIN SHERY MANSOURI DDS

Dentist

(General Practice)

2500 ALTON PKWY
SUITE 200
IRVINE, CA
ZIP 92606

(949) 748-7373

SERENE DENTAL CENTER

Dentist

2500 ALTON PKWY
SUITE 200
IRVINE, CA
ZIP 92606

(949) 748-7373

OMID VESAL, MD, MEDICAL CORPORATION

Internal Medicine

2500 ALTON PKWY
SUITE 101
IRVINE, CA
ZIP 92606

(949) 222-2722

DR. MARY MEKHAEL OD

Optometrist

2500 ALTON PKWY
STE 102
IRVINE, CA
ZIP 92606

(949) 679-2426

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1700812997, enumerated in the NPI registry as an "individual" on June 23, 2006

The provider is located at 2500 Alton Pkwy Suite 102 Irvine, Ca 92606 and the phone number is (949) 679-2426

The provider's speciality is Ophthalmology with taxonomy code 207WX0120X with a focus in Cornea and External Diseases Specialist

The provider has more than 33 years of experience. He graduated from University Of Southern California Keck School Of Medicine in 1993.

The provider might be accepting Accepts: California Medicaid, Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.

Yes, as of July 06, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.

The provider has an overall high rating in the following quality measures: uses technology to exchange and make use of healthcare information. The provider obtained a high score in the following performance measures: e-Prescribing , Provide Patients Electronic Access to Their Health Information. The quality ratings are based on unbiased reviews and reported submissions to Medicare's Quality Payment Program.

Medicare beneficiaries should expect a typical cost of $142.39 with an average copayment of $35.59 for new patient appointments. Established patients should expect a typical charge of $77.96 and an average copayment of 19.49. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Cataract surgery, Established patient complete exam of visual system, Established patient office or other outpatient visit, 10-19 minutes, Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Established patient problem focused exam of visual system, Imaging of optic nerve, Imaging of retina, Measurement of corneal curvature and depth of eye, New patient complete exam of visual system, New patient office or other outpatient visit, 15-29 minutes, New patient office or other outpatient visit, 30-44 minutes, New patient office or other outpatient visit, 45-59 minutes, Removal of cataract with insertion of prosthetic lens and Removal of recurring cataract in lens capsule using a laser.

This NPI record was last updated on June 23, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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