MARCELLA CASTELLANOS
NPI 1780203471
Health Educator in Mill Valley, CA

NPI Status: Active since April 13, 2020

Contact Information

35 MILLER AVE STE 273
MILL VALLEY, CA
ZIP 94941
Phone: (415) 302-3651

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

Individual
Female
Health Educator

About MARCELLA CASTELLANOS

This page provides the complete NPI Profile along with additional information for Marcella Castellanos, a provider established in Mill Valley, California with a medical specialization in Health Educator. The healthcare provider is registered in the NPI registry with number 1780203471 assigned on April 2020. The practitioner's primary taxonomy code is 174H00000X. The provider is registered as an individual and her NPI record was last updated 6 years ago.

NPI: 1780203471
Provider Name: MARCELLA CASTELLANOS
Gender: Female
Entity Type: Individual
Location Address: 35 MILLER AVE STE 273 MILL VALLEY, CA 94941
Location Phone: (415) 302-3651
Mailing Address: 9596 SIERRA MADRE CT SOLEDAD, CA 93960
Is Sole Proprietor?: Yes
Enumeration Date: 04-13-2020
Last Update Date: 04-13-2020
Code Navigator

Location Map

Secondary Locations

35 Miller Ave Ste 273
Mill Valley, CA 94941
(415) 302-3651

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: Health Educator
Taxonomy Code: 174H00000X
Type: Other Service Providers
Taxonomy Description: Health educators work in a variety of settings providing education to individuals or groups of individuals on healthy behaviors, wellness, and health-related topics with the goal of preventing diseases and health problems. Health educators generally require a bachelor's degree and may receive additional training, such as through mentoring, internships, or volunteer work.

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 1780203471, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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 → 4

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

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 2 → 4 3 → 6 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 6 + 0 + 4 + 0 + 6 + 4 + 1 + 4 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1780203471.