MR. ALVARO ALBERTO CASTRO SLPA
NPI 1720507049
Specialist/Technologist - Speech-Language Assistant in Oxnard, CA

NPI Status: Active since September 18, 2017

Contact Information

405 E ESPLANADE DR STE 102
OXNARD, CA
ZIP 93036
Phone: (805) 485-7000

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

Individual
Male
Specialist/Technologist
Speech-Language Assistant

About ALVARO CASTRO

This page provides the complete NPI Profile along with additional information for Alvaro Castro, a provider established in Oxnard, California with a medical specialization in Specialist/technologist, focusing in speech-language assistant . The healthcare provider is registered in the NPI registry with number 1720507049 assigned on September 2017. The practitioner's primary taxonomy code is 2355S0801X with license number 3094 (CA). The provider is registered as an individual and his NPI record was last updated 9 years ago.

NPI: 1720507049
Provider Name: MR. ALVARO ALBERTO CASTRO SLPA
Gender: Male
Entity Type: Individual
Location Address: 405 E ESPLANADE DR STE 102 OXNARD, CA 93036
Location Phone: (805) 485-7000
Mailing Address: 5411 1/2 FERNWOOD AVE APT 4 LOS ANGELES, CA 90027
Mailing Phone: (213) 215-5674
Is Sole Proprietor?: No
Enumeration Date: 09-18-2017
Last Update Date: 09-18-2017
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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: Specialist/Technologist Speech-Language Assistant
Taxonomy Code: 2355S0801X
Type: Speech, Language and Hearing Service Providers
License No.: 3094
License State: CA

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 1720507049, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 8

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 2 → 4 5 → 10 → 1 7 → 14 → 5 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 4 + 0 + 1 + 0 + 0 + 1 + 4 + 0 + 8 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1720507049.