WILLIAM ARNOLD HORTON MD
NPI 1740393552
Medical Genetics - Clinical Molecular Genetics in Portland, OR

NPI Status: Active since August 16, 2006

Contact Information

3101 SW SAM JACKSON PARK ROAD
PORTLAND, OR
ZIP 97239
Phone: (503) 221-1537
Fax: (503) 221-3451

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Medical Genetics
Clinical Molecular Genetics

About WILLIAM HORTON

This page provides the complete NPI Profile along with additional information for William Horton, a provider established in Portland, Oregon with a medical specialization in Medical Genetics, focusing in clinical molecular genetics . The healthcare provider is registered in the NPI registry with number 1740393552 assigned on August 2006. The practitioner's primary taxonomy code is 207SG0203X with license number MD18607 (OR). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1740393552
Provider Name: WILLIAM ARNOLD HORTON MD
Gender: Male
Entity Type: Individual
Location Address: 3101 SW SAM JACKSON PARK ROAD PORTLAND, OR 97239
Location Phone: (503) 221-1537
Location Fax: (503) 221-3451
Mailing Address: 3101 SW SAM JACKSON PARK ROAD PORTLAND, OR 97239
Mailing Phone: (503) 221-1537
Mailing Fax: (503) 221-3451
Is Sole Proprietor?: No
Enumeration Date: 08-16-2006
Last Update Date: 07-08-2007
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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: Medical Genetics Clinical Molecular Genetics
Taxonomy Code: 207SG0203X
Type: Allopathic & Osteopathic Physicians
License No.: MD18607
License State: OR
Taxonomy Description: A clinical molecular geneticist demonstrates competence in performing and interpreting molecular analyses relevant to the diagnosis and management of human genetic diseases and is a consultant regarding laboratory diagnosis of a broad range of inherited disorders.

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 1740393552, we treat the final digit (2) 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 8

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

Check

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 4 → 8 3 → 6 3 → 6 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 8 + 0 + 6 + 9 + 6 + 5 + 1 + 0 + 24 = 68

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

The next multiple of ten after 68 is 70. The difference is the calculated check digit.

70 - 68 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1740393552.