DR. EDWARD DIAO MD
NPI 1427009794
Orthopaedic Surgery in San Francisco, CA

NPI Status: Active since May 12, 2006

Contact Information

450 SUTTER ST
SUITE 500
SAN FRANCISCO, CA
ZIP 94108
Phone: (415) 362-8880
Fax: (415) 393-9633

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  • Individual
  • Male
  • Years of Experience 45
  • Orthopaedic Surgery
  • Accepts Medicare Approved Payment
  • PECOS Enrolled
  • CLIA Number: 05D2037615
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 03-01-2026

About EDWARD DIAO

This page provides the complete NPI Profile along with additional information for Edward Diao, a provider established in San Francisco, California with a medical specialization in Orthopaedic Surgery and more than 45 years of experience. He graduated from Columbia University College Of Physicians And Surgeons in 1981. The healthcare provider is registered in the NPI registry with number 1427009794 assigned on May 2006. The practitioner's primary taxonomy code is 207X00000X with license number G77448 (CA). The provider is registered as an individual and his NPI record was last updated 11 years ago.

NPI
1427009794
Provider Name
DR. EDWARD DIAO MD
Gender
Male
Entity Type
Individual
Location Address
450 SUTTER ST SUITE 500 SAN FRANCISCO, CA 94108
Location Phone
(415) 362-8880
Location Fax
(415) 393-9633
Mailing Address
450 SUTTER ST SUITE 500 SAN FRANCISCO, CA 94108
Mailing Phone
(415) 362-8880
Mailing Fax
(415) 393-9633
Medical School Name
COLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduation Year
1981
Is Sole Proprietor?
Yes
Enumeration Date
05-12-2006
Last Update Date
01-06-2015
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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

Orthopaedic Surgery

Taxonomy Code
207X00000X
Type
Allopathic & Osteopathic Physicians
License No.
G77448
License State
CA
Taxonomy Description
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

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)
1207XS0106XAllopathic & Osteopathic Physicians

Orthopaedic Surgery
Hand Surgery

G77448 (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.

*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
00G774480MEDICAID (05)CA 
A60866MEDICARE UPIN (02)CA 
00G774480MEDICARE PIN (08)CA 

Medicare Participation & PECOS Enrollment Status

Edward Diao 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.

Edward Diao 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: 5294709952

    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: I20070329000690

    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.

Orthotic Devices

  • DME-Orthotic Devices (DF000N)

    Dynamic adjustable finger extension/flexion device, includes soft interface material (HCPCS:E1825)

    1 DME suppliers used 12 Medicare Claims 12 Services Paid

  • DME-Orthotic Devices (DF000N)

    Wrist hand finger orthosis, without joint(s), prefabricated, off-the-shelf, any type (HCPCS:L3809)

    2 DME suppliers used 11 Medicare Claims 11 Services Paid

  • DME-Orthotic Devices (DF000N)

    Wrist hand orthosis, wrist extension control cock-up, non molded, prefabricated, off-the-shelf (HCPCS:L3908)

    1 DME suppliers used 12 Medicare Claims 13 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.

Aspiration and/or injection of fluid from medium joint

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

This service was performed 24 times for 15 patients

Complete ultrasound scan of joint

A complete ultrasound scan of a joint is a non-invasive procedure using sound waves to create images of your joint. It helps identify problems like inflammation, injury, or disease. It's painless, safe, and doesn't involve radiation.

This service was performed 37 times for 27 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 114 times for 64 patients

Imaging guidance for procedure, 60 minutes or less

Imaging guidance is a procedure where real-time images are used to direct medical tools during a treatment. This technique helps to improve accuracy and safety. The procedure typically lasts 60 minutes or less.

This service was performed 174 times for 84 patients

Injection into tendon or ligament

An injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.

This service was performed 15 times for 13 patients

Injection of anesthetic agent and/or steroid into other nerve or branch

This procedure involves injecting an anesthetic agent or steroid into a specific nerve or its branch. The goal is to relieve pain by reducing inflammation and numbing the area. It is commonly used for chronic pain management. The process is safe and usually quick.

This service was performed 17 times for 15 patients

Melanoma (skin cancer) excision

Melanoma excision is a procedure where a surgeon removes melanoma, a type of skin cancer, and some surrounding healthy tissue. Local anesthesia is applied to numb the area. The goal is to completely remove the cancer and prevent its spread. Healing time varies.

This service was performed for 1-10 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 64 times for 64 patients

Upper limb (arm) arthroscopy (minimally invasive joint repair)

Upper limb arthroscopy is a minimally invasive procedure used to examine and treat issues within your arm's joints. A small camera, called an arthroscope, is inserted through a tiny incision, providing a clear view of the joint. This method often results in less pain and faster recovery compared to open surgery.

This service was performed for 1-10 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $26.12 for a new patient copayment and $21.22 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 94108 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $104.51
  • Minimum New Patient Price $69
  • Maximum New Patient Price $202.35
  • Average New Patient Copayment $26.12
  • 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 99213

  • Average Established Patient Price $84.91
  • Minimum Established Patient Price $23.44
  • Maximum Established Patient Price $166.46
  • Average Established Patient Copayment $21.22
  • 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
05D2037615
Facility Type
Physician Office
Certificate Effective Date
March 02, 2024
Certificate Expiration Date
March 01, 2026
Laboratory Director
EDWARD DIAO
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Edward Diao 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 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.
1427009794
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
24470018718
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 4 + 7 + 0 + 0 + 1 + 8 + 7 + 1 + 8 + 24 = 66
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 66 = 44

The NPI number 1427009794 is valid because the calculated check digit 4 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


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

NPI Name / Type Taxonomy Address
1740287432DR. KELVIN WAYNE HALL D.D.S.
Individual
Dentist (General Practice)450 SUTTER ST SUITE 1330
SAN FRANCISCO, CA 94108
(415) 981-8592
1760474894 LUCIA R TUFFANELLI MD
Individual
Dermatology450 SUTTER ST STE 1306
SAN FRANCISCO, CA 94108
(415) 781-4083
1548252117PROF. SERGIO E MARTINEZ PT
Individual
Physical Therapist (Orthopedic)450 SUTTER ST SUITE 1038
SAN FRANCISCO, CA 94108
(415) 788-5540
1497747943DR. SAMUEL DA-SENG KAO M.D.
Individual
Surgery (Surgery of the Hand)450 SUTTER ST SUITE 1533
SAN FRANCISCO, CA 94108
(415) 392-9291
1528050002DR. KAN L TOY DDS
Individual
Dentist450 SUTTER ST SUITE 2340
SAN FRANCISCO, CA 94108
(415) 421-0555
1699762070 DONALD E HERSHMAN D.P.M.
Individual
Podiatrist450 SUTTER ST #1101
SAN FRANCISCO, CA 94108
(415) 362-1101
1811968605 BEVERLY A EPSTEIN MD
Individual
Dermatology450 SUTTER ST STE 1306
SAN FRANCISCO, CA 94108
(415) 781-4083
1831161462DR. JESSIE VIRGINIA VALLEE DDS
Individual
Dentist (General Practice)450 SUTTER ST SUITE 2130
SAN FRANCISCO, CA 94108
(415) 296-1126
1043285737DR. JAMES C. PIEPERGERDES M.D.
Individual
Otolaryngology450 SUTTER ST SUITE 933
SAN FRANCISCO, CA 94108
(415) 362-5443
1891757167DR. LAMBERT J STUMPEL DDS
Individual
Dentist450 SUTTER ST SUITE 2530
SAN FRANCISCO, CA 94108
(415) 362-7269
1831149335DR. VAIL CHARLES REESE M.D.
Individual
Dermatology450 SUTTER ST SUITE #830
SAN FRANCISCO, CA 94108
(415) 362-2238
1861446072 LIESBETH STEPHANIE OEI D.P.T.
Individual
Physical Therapist450 SUTTER ST SUITE 2640
SAN FRANCISCO, CA 94108
(415) 806-6338
1164468799 MICHAEL I TURAN M.D.
Individual
Ophthalmology450 SUTTER ST SUITE 1918
SAN FRANCISCO, CA 94108
(415) 421-8667
1295764678DR. DAVID EHSAN MD, DDS
Individual
Dentist (Oral and Maxillofacial Surgery)450 SUTTER ST SUITE 2230
SAN FRANCISCO, CA 94108
(415) 395-9987
1952330078 MYUNG SOOK SON-MCINTYRE D.D.S.
Individual
Dentist (General Practice)450 SUTTER ST SUITE 1839
SAN FRANCISCO, CA 94108
(415) 981-9022
1386675700MR. DAVID TETSUO NISHIMOTO PHYSICAL THERAPIST
Individual
Physical Therapist450 SUTTER ST SUITE #2640
SAN FRANCISCO, CA 94108
(415) 788-5540
1497789440DR. DAWN M POWLAN DDS
Individual
Dentist (General Practice)450 SUTTER ST SUITE 1800
SAN FRANCISCO, CA 94108
(415) 332-4631
1609892009DR. CLAUDE SIDI D.M.D.
Individual
Dentist (General Practice)450 SUTTER ST STE 1819
SAN FRANCISCO, CA 94108
(415) 391-9748
1194745844DR. THEODORE ERIC JACOBSON DDS
Individual
Dentist (Prosthodontics)450 SUTTER ST 2600
SAN FRANCISCO, CA 94108
(415) 362-2167
1528087269DR. EDWARD L LOEV D.M.D.
Individual
Dentist450 SUTTER ST SUITE 2428
SAN FRANCISCO, CA 94108
(415) 392-2072

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1427009794, enumerated in the NPI registry as an "individual" on May 12, 2006

The provider is located at 450 Sutter St Suite 500 San Francisco, Ca 94108 and the phone number is (415) 362-8880

The provider's speciality is Orthopaedic Surgery with taxonomy code 207X00000X

The provider has more than 45 years of experience. He graduated from Columbia University College Of Physicians And Surgeons in 1981.

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

Yes, as of June 20, 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.

Medicare beneficiaries should expect a typical cost of $104.51 with an average copayment of $26.12 for new patient appointments. Established patients should expect a typical charge of $84.91 and an average copayment of 21.22. 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: Aspiration and/or injection of fluid from medium joint, Complete ultrasound scan of joint, Established patient office or other outpatient visit, 20-29 minutes, Imaging guidance for procedure, 60 minutes or less, Injection into tendon or ligament, Injection of anesthetic agent and/or steroid into other nerve or branch, Melanoma (skin cancer) excision, New patient office or other outpatient visit, 30-44 minutes and Upper limb (arm) arthroscopy (minimally invasive joint repair).

The provider's CLIA number is 05D2037615 for a "physician office" facility with a CLIA Certificate of Waiver. This CLIA certificate is issued 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..

This NPI record was last updated on May 12, 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].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.