AMBER MARJORIE POWNER AU.D.
NPI 1881067890
Audiologist-Hearing Aid Fitter in Santa Rosa, CA

NPI Status: Active since November 12, 2015

Contact Information

1701 4TH ST STE 120
SANTA ROSA, CA
ZIP 95404
Phone: (707) 523-7025

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

Individual
Female
Audiologist-Hearing Aid Fitter

About AMBER POWNER

This page provides the complete NPI Profile along with additional information for Amber Powner, a provider established in Santa Rosa, California with a medical specialization in Audiologist-hearing Aid Fitter. The healthcare provider is registered in the NPI registry with number 1881067890 assigned on November 2015. The practitioner's primary taxonomy code is 237600000X with license number AU3005 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1881067890
Provider Name: AMBER MARJORIE POWNER AU.D.
Gender: Female
Entity Type: Individual
Location Address: 1701 4TH ST STE 120 SANTA ROSA, CA 95404
Location Phone: (707) 523-7025
Mailing Address: 2001 PINER RD APT 229 SANTA ROSA, CA 95403
Mailing Phone: (707) 523-4740
Is Sole Proprietor?: No
Enumeration Date: 11-12-2015
Last Update Date: 11-26-2025
Code Navigator

Location Map

Secondary Locations

1111 Sonoma Ave Ste 316
Santa Rosa, CA 95405
(707) 523-4740

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: Audiologist-Hearing Aid Fitter
Taxonomy Code: 237600000X
Type: Speech, Language and Hearing Service Providers
License No.: AU3005
License State: CA
Taxonomy Description: An audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of tests to determine the exact nature of an individual's hearing problem, presents a variety of treatment options to patients, dispenses and fits hearing aids, administers tests of balance to evaluate dizziness and provides hearing rehabilitation training. This classification should be used where individuals are licensed as audiologist-hearing aid fitters as opposed to states that license individuals as audiologists.

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 1881067890, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

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 8 → 16 → 7 0 → 0 7 → 14 → 5 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 6 + 1 + 0 + 6 + 1 + 4 + 8 + 1 + 8 + 24 = 70

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

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

70 - 70 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1881067890.