DINA BIRCH
NPI 1891492005
Adult Companion in Grass Valley, CA

NPI Status: Active since February 08, 2023

Contact Information

760 S AUBURN ST STE C2
GRASS VALLEY, CA
ZIP 95945
Phone: (530) 265-5811

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

Individual
Female
Adult Companion

About DINA BIRCH

This page provides the complete NPI Profile along with additional information for Dina Birch, a provider established in Grass Valley, California with a medical specialization in Adult Companion. The healthcare provider is registered in the NPI registry with number 1891492005 assigned on February 2023. The practitioner's primary taxonomy code is 372600000X. The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1891492005
Provider Name: DINA BIRCH
Gender: Female
Entity Type: Individual
Location Address: 760 S AUBURN ST STE C2 GRASS VALLEY, CA 95945
Location Phone: (530) 265-5811
Mailing Address: 760 S AUBURN ST STE C2 GRASS VALLEY, CA 95945
Mailing Phone: (530) 265-5811
Is Sole Proprietor?: No
Enumeration Date: 02-08-2023
Last Update Date: 04-15-2025
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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: Adult Companion
Taxonomy Code: 372600000X
Type: Nursing Service Related Providers
License State: CA
Taxonomy Description: An individual who provides supervision, socialization, and non-medical care to a functionally impaired adult. Companions may assist or supervise the individual with such tasks as meal preparation, laundry and shopping, but do not perform these activities as discrete services. These services are provided in accordance with a therapeutic goal in the plan of care.

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 1891492005, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

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

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 8 + 1 + 8 + 9 + 4 + 0 + 0 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1891492005.