DAVID CONTRERAS M.D.
NPI 1821048216
Orthopaedic Surgery in Walnut Creek, CA

NPI Status: Active since May 10, 2006

Contact Information

2405 SHADELANDS DR
WALNUT CREEK, CA
ZIP 94598
Phone: (925) 939-8585
Fax: (925) 933-2709

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  • Individual
  • Male
  • Orthopaedic Surgery

About DAVID CONTRERAS

This page provides the complete NPI Profile along with additional information for David Contreras, a provider established in Walnut Creek, California with a medical specialization in Orthopaedic Surgery. The healthcare provider is registered in the NPI registry with number 1821048216 assigned on May 2006. The practitioner's primary taxonomy code is 207X00000X with license number G52522 (CA). The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI
1821048216
Provider Name
DAVID CONTRERAS M.D.
Gender
Male
Entity Type
Individual
Location Address
2405 SHADELANDS DR WALNUT CREEK, CA 94598
Location Phone
(925) 939-8585
Location Fax
(925) 933-2709
Mailing Address
PO BOX 31396 WALNUT CREEK, CA 94598
Mailing Phone
(925) 939-8585
Mailing Fax
(925) 933-2709
Is Sole Proprietor?
No
Enumeration Date
05-10-2006
Last Update Date
09-16-2020
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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.
G52522
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.

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 large joint

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

This service was performed 478 times for 264 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 501 times for 306 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 177 times for 167 patients

Hyaluronan or derivative, gel-one, for intra-articular injection, per dose

Hyaluronan or Gel-One is a substance injected directly into your joint space. It's aimed to supplement your body's natural joint fluid, helping to lubricate and cushion the joint, reducing pain and improving mobility. It's often used for arthritis relief.

This service was performed 102 times for 68 patients

Hyaluronan or derivative, gelsyn-3, for intra-articular injection, 0.1 mg

Gelsyn-3 is a treatment involving injections of a substance called hyaluronan into the joint space. Hyaluronan is naturally present in healthy joint fluid, aiding in lubrication and shock absorption. This treatment helps relieve joint pain, often in conditions like osteoarthritis.

This service was performed 12,768 times for 20 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

This service was performed 1,499 times for 224 patients

Mri scan of leg joint without contrast

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

This service was performed 46 times for 45 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 116 times for 116 patients

Removal of knee cartilage using an endoscope

This procedure, known as arthroscopic knee surgery, involves using a small camera (endoscope) to view the inside of your knee. Small instruments are used to remove damaged cartilage. This can help alleviate pain and improve knee function.

This service was performed 13 times for 13 patients

X-ray of hip, 2-3 views

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

This service was performed 35 times for 35 patients

X-ray of knee, 3 views

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

This service was performed 23 times for 20 patients

X-ray of knee, 4 or more views

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

This service was performed 137 times for 110 patients

X-ray of lower and sacral spine, 2-3 views

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

This service was performed 22 times for 22 patients

X-ray of shoulder, minimum of 2 views

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

This service was performed 32 times for 29 patients

Reviews for DAVID CONTRERAS M.D.

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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 1821048216, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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
8
Unchanged
Pos 3
2
Doubled → 4
Pos 4
1
Unchanged
Pos 5
0
Doubled → 0
Pos 6
4
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
2
Unchanged
Pos 9
1
Doubled → 2
Check
6
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 2 → 4 0 → 0 8 → 16 → 7 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 0 + 4 + 1 + 6 + 2 + 2 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1821048216.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Specialist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Specialist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Anesthesiology
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Medical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Registered Nurse (Medical-Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Registered Nurse (Medical-Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Sports)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1821048216, enumerated as an "individual" on May 10, 2006.

The provider is located at 2405 SHADELANDS DR WALNUT CREEK, CA 94598 and the phone number is (925) 939-8585.

Orthopaedic Surgery with taxonomy code 207X00000X.