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
- 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
- Code Navigator
Location Map
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) |
---|---|---|---|---|
1 | 207XS0106X | Allopathic & Osteopathic Physicians | Orthopaedic 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 |
---|---|---|---|
00G774480 | MEDICAID (05) | CA | |
A60866 | MEDICARE UPIN (02) | CA | |
00G774480 | MEDICARE 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
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
Upper limb (arm) arthroscopy (minimally invasive joint repair)
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 patientsA 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 patientsThis 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 patientsImaging 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 patientsAn 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 patientsThis 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 patientsMelanoma 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 patientsThis 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 patientsUpper 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 patientsPhysician 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. | |||||||||
1 | 4 | 2 | 7 | 0 | 0 | 9 | 7 | 9 | 4 |
Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
2 | 4 | 4 | 7 | 0 | 0 | 18 | 7 | 18 | |
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 = 4 | 4 |
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 |
---|---|---|---|
1740287432 | DR. 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 | Dermatology | 450 SUTTER ST STE 1306 SAN FRANCISCO, CA 94108 (415) 781-4083 |
1548252117 | PROF. SERGIO E MARTINEZ PT Individual | Physical Therapist (Orthopedic) | 450 SUTTER ST SUITE 1038 SAN FRANCISCO, CA 94108 (415) 788-5540 |
1497747943 | DR. SAMUEL DA-SENG KAO M.D. Individual | Surgery (Surgery of the Hand) | 450 SUTTER ST SUITE 1533 SAN FRANCISCO, CA 94108 (415) 392-9291 |
1528050002 | DR. KAN L TOY DDS Individual | Dentist | 450 SUTTER ST SUITE 2340 SAN FRANCISCO, CA 94108 (415) 421-0555 |
1699762070 | DONALD E HERSHMAN D.P.M. Individual | Podiatrist | 450 SUTTER ST #1101 SAN FRANCISCO, CA 94108 (415) 362-1101 |
1811968605 | BEVERLY A EPSTEIN MD Individual | Dermatology | 450 SUTTER ST STE 1306 SAN FRANCISCO, CA 94108 (415) 781-4083 |
1831161462 | DR. JESSIE VIRGINIA VALLEE DDS Individual | Dentist (General Practice) | 450 SUTTER ST SUITE 2130 SAN FRANCISCO, CA 94108 (415) 296-1126 |
1043285737 | DR. JAMES C. PIEPERGERDES M.D. Individual | Otolaryngology | 450 SUTTER ST SUITE 933 SAN FRANCISCO, CA 94108 (415) 362-5443 |
1891757167 | DR. LAMBERT J STUMPEL DDS Individual | Dentist | 450 SUTTER ST SUITE 2530 SAN FRANCISCO, CA 94108 (415) 362-7269 |
1831149335 | DR. VAIL CHARLES REESE M.D. Individual | Dermatology | 450 SUTTER ST SUITE #830 SAN FRANCISCO, CA 94108 (415) 362-2238 |
1861446072 | LIESBETH STEPHANIE OEI D.P.T. Individual | Physical Therapist | 450 SUTTER ST SUITE 2640 SAN FRANCISCO, CA 94108 (415) 806-6338 |
1164468799 | MICHAEL I TURAN M.D. Individual | Ophthalmology | 450 SUTTER ST SUITE 1918 SAN FRANCISCO, CA 94108 (415) 421-8667 |
1295764678 | DR. 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 |
1386675700 | MR. DAVID TETSUO NISHIMOTO PHYSICAL THERAPIST Individual | Physical Therapist | 450 SUTTER ST SUITE #2640 SAN FRANCISCO, CA 94108 (415) 788-5540 |
1497789440 | DR. DAWN M POWLAN DDS Individual | Dentist (General Practice) | 450 SUTTER ST SUITE 1800 SAN FRANCISCO, CA 94108 (415) 332-4631 |
1609892009 | DR. CLAUDE SIDI D.M.D. Individual | Dentist (General Practice) | 450 SUTTER ST STE 1819 SAN FRANCISCO, CA 94108 (415) 391-9748 |
1194745844 | DR. THEODORE ERIC JACOBSON DDS Individual | Dentist (Prosthodontics) | 450 SUTTER ST 2600 SAN FRANCISCO, CA 94108 (415) 362-2167 |
1528087269 | DR. EDWARD L LOEV D.M.D. Individual | Dentist | 450 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].
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