MR. CHRISTOPHER MICHAEL NICKLO HAD
NPI 1902441298
Hearing Instrument Specialist in San Francisco, CA

NPI Status: Active since November 11, 2019

Contact Information

450 SUTTER ST RM 1400
SAN FRANCISCO, CA
ZIP 94108
Phone: (415) 362-2901

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

Individual
Male
Hearing Instrument Specialist

About CHRISTOPHER NICKLO

This page provides the complete NPI Profile along with additional information for Christopher Nicklo, a provider established in San Francisco, California with a medical specialization in Hearing Instrument Specialist. The healthcare provider is registered in the NPI registry with number 1902441298 assigned on November 2019. The practitioner's primary taxonomy code is 237700000X with license number 8558 (CA). The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI: 1902441298
Provider Name: MR. CHRISTOPHER MICHAEL NICKLO HAD
Gender: Male
Entity Type: Individual
Location Address: 450 SUTTER ST RM 1400 SAN FRANCISCO, CA 94108
Location Phone: (415) 362-2901
Mailing Address: 5915 TAFT AVE OAKLAND, CA 94618
Mailing Phone: (510) 654-7548
Is Sole Proprietor?: No
Enumeration Date: 11-11-2019
Last Update Date: 11-11-2019
Code Navigator

Location Map

Secondary Locations

752 Broadway
Sonoma, CA 95476
(415) 362-2901
2100 Webster St Ste 202
San Francisco, CA 94115
(415) 362-2901
2250 Hayes St Ste 612
San Francisco, CA 94117
(415) 362-2901

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: Hearing Instrument Specialist
Taxonomy Code: 237700000X
Type: Speech, Language and Hearing Service Providers
License No.: 8558
License State: CA
Taxonomy Description: Individuals who test hearing for the selection, adaptation, fitting, adjusting, servicing, and sale of hearing aids. Hearing Instrument Specialist is a designation provided individuals who qualify by the National Hearing Aid Society

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 1902441298, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 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 0 → 0 4 → 8 1 → 2 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 8 + 4 + 2 + 2 + 1 + 8 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1902441298.