MARISSA ALYSE BROWN
NPI 1578491809
Nurse Practitioner - Neonatal in Tucson, AZ

NPI Status: Active since May 08, 2026

Contact Information

1625 N CAMPBELL AVE
TUCSON, AZ
ZIP 85719
Phone: (520) 694-0111

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Newly Listed Provider
This NPI profile has been added to the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Nurse Practitioner
Neonatal

About MARISSA BROWN

This page provides the complete NPI Profile along with additional information for Marissa Brown, a provider established in Tucson, Arizona with a medical specialization in Nurse Practitioner, focusing in neonatal . The healthcare provider is registered in the NPI registry with number 1578491809 assigned on May 2026. The practitioner's primary taxonomy code is 363LN0000X with license number 249000 (AZ). The provider is registered as an individual and her NPI record was last updated May 2026.

NPI: 1578491809
Provider Name: MARISSA ALYSE BROWN
Gender: Female
Entity Type: Individual
Location Address: 1625 N CAMPBELL AVE TUCSON, AZ 85719
Location Phone: (520) 694-0111
Mailing Address: 7602 S CAMINITO GALANO TUCSON, AZ 85756
Is Sole Proprietor?: No
Enumeration Date: 05-08-2026
Last Update Date: 05-08-2026
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A nurse practitioner (NP) like Marissa Brown is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.

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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: Nurse Practitioner Neonatal
Taxonomy Code: 363LN0000X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: 249000
License State: AZ

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 1578491809, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 2

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 7 → 14 → 5 4 → 8 1 → 2 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 4 + 8 + 8 + 9 + 2 + 8 + 0 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1578491809.