DR. ASSAF KADAR MD
NPI 1124520523
Orthopaedic Surgery in New Haven, CT

NPI Status: Active since March 02, 2018

Contact Information

20 YORK ST
NEW HAVEN, CT
ZIP 06510
Phone: (203) 688-4242

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NPPES record last updated: August 1, 2018. Verified against the NPPES registry weekly; last sync: July 12, 2026.

Record update history: Aug 1, 2018, Mar 2, 2018 (2 updates tracked since 2018).

  • Individual
  • Male
  • Orthopaedic Surgery

About ASSAF KADAR

This page provides the complete NPI Profile along with additional information for Assaf Kadar, a provider established in New Haven, Connecticut with a medical specialization in Orthopaedic Surgery. The healthcare provider is registered in the NPI registry with number 1124520523 assigned on March 2018. The practitioner's primary taxonomy code is 207X00000X with license number 60867 (CT). The provider is registered as an individual and his NPI record was last updated 8 years ago.

NPI
1124520523
Provider Name
DR. ASSAF KADAR MD
Gender
Male
Entity Type
Individual
Location Address
20 YORK ST NEW HAVEN, CT 06510
Location Phone
(203) 688-4242
Mailing Address
20 YORK ST NEW HAVEN, CT 06510
Mailing Phone
(203) 688-4242
Is Sole Proprietor?
Yes
Enumeration Date
03-02-2018
Last Update Date
08-01-2018
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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.
60867
License State
CT
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)
1390200000XStudent, Health Care

Student in an Organized Health Care Education/Training Program

 

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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 1124520523, we treat the final digit (3) 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 47. The final step is to find the difference between that total and the next multiple of ten (50 - 47 = 3).

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
1
Unchanged
Pos 3
2
Doubled → 4
Pos 4
4
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
2
Unchanged
Pos 7
0
Doubled → 0
Pos 8
5
Unchanged
Pos 9
2
Doubled → 4
Check
3
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 5 → 10 → 1 0 → 0 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 4 + 4 + 1 + 0 + 2 + 0 + 5 + 4 + 24 = 47

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

The next multiple of ten after 47 is 50. The difference is the calculated check digit.

50 - 47 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1124520523.

Other Providers at the Same Location


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

Radiology (Diagnostic Radiology)
20 YORK ST, YALE NEW HAVEN HOSPITAL
NEW HAVEN, CT 06510
Emergency Medicine
20 YORK ST, YNHH SOUTH PAVILION 218
NEW HAVEN, CT 06510
Physician Assistant
20 YORK ST, YALE NEW HAVEN HOSPITAL SOUTH PAVILION 218
NEW HAVEN, CT 06510
Medical Genetics (Clinical Genetics (M.D.))
20 YORK ST, YALE CHILDREN'S HOSPITAL, WEST PAVILION, 2ND FLOOR
NEW HAVEN, CT 06510
Medical Genetics (Clinical Genetics (M.D.))
20 YORK ST, CHILDREN'S HOSPITAL AT YALE, WEST PAVILION, 2ND FLOOR
NEW HAVEN, CT 06510
Psychiatry & Neurology (Psychiatry)
20 YORK ST
NEW HAVEN, CT 06510
Radiology (Diagnostic Radiology)
20 YORK ST, YALE NEW HAVEN HOSPITAL-SOUTH PAVILLION-2ND FL
NEW HAVEN, CT 06510
Physician Assistant
20 YORK ST, YALE NEW HAVEN HOSPTIAL EMERGENCY DEPARTMENT
NEW HAVEN, CT 06510
Pathology (Anatomic Pathology)
20 YORK ST, YALE-NEW HAVEN CHILDREN'S HOSPITAL-EP 2608
NEW HAVEN, CT 06510
Emergency Medicine
20 YORK ST, YNHH SOUTH PAVILION 218
NEW HAVEN, CT 06510
Radiology (Diagnostic Radiology)
20 YORK ST, YALE NEW HAVEN HOSPITAL SOUTH PAVILION 2ND FLOOR
NEW HAVEN, CT 06510
Pathology (Hematology)
20 YORK ST, YNHH, CLINIC BUILDING, ROOM 407
NEW HAVEN, CT 06510
Emergency Medicine
20 YORK ST, YNHH SOUTH PAVILION - ROOM 218
NEW HAVEN, CT 06510
Radiology (Vascular & Interventional Radiology)
20 YORK ST, YNHH SOUTH PAVILION - 2ND FLOOR
NEW HAVEN, CT 06510
Physician Assistant
20 YORK ST, YALE NEW HAVEN HOSPITAL
NEW HAVEN, CT 06510
Pathology (Anatomic Pathology)
20 YORK ST, EP#2-608B
NEW HAVEN, CT 06510
Pathology (Clinical Pathology/Laboratory Medicine)
20 YORK ST, YNHH CB 407
NEW HAVEN, CT 06510
Pathology (Clinical Pathology/Laboratory Medicine)
20 YORK ST, YNHH, CLINIC BUILDING, ROOM 407
NEW HAVEN, CT 06510
Pathology (Clinical Pathology/Laboratory Medicine)
20 YORK ST, YNHH - CLINIC BUILDING, ROOM 407
NEW HAVEN, CT 06510
Neurological Surgery
20 YORK ST, YNHH- CHILDREN'S HOSP. - WEST PAVILLION 2ND FL
NEW HAVEN, CT 06510

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1124520523, enumerated as an "individual" on March 02, 2018.

The provider is located at 20 YORK ST NEW HAVEN, CT 06510 and the phone number is (203) 688-4242.

Orthopaedic Surgery with taxonomy code 207X00000X.