KATRINA KEYSER RD
NPI 1982539599
Dietitian, Registered in Flagstaff, AZ

NPI Status: Active since June 15, 2026

Contact Information

1215 N BEAVER ST STE 203
FLAGSTAFF, AZ
ZIP 86001
Phone: (928) 773-2033
Fax: (928) 214-3981

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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
Dietitian, Registered

About KATRINA KEYSER

This page provides the complete NPI Profile along with additional information for Katrina Keyser, a provider established in Flagstaff, Arizona with a medical specialization in Dietitian, Registered. The healthcare provider is registered in the NPI registry with number 1982539599 assigned on June 2026. The practitioner's primary taxonomy code is 133V00000X with license number 1060509 (AZ). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI: 1982539599
Provider Name: KATRINA KEYSER RD
Gender: Female
Entity Type: Individual
Location Address: 1215 N BEAVER ST STE 203 FLAGSTAFF, AZ 86001
Location Phone: (928) 773-2033
Location Fax: (928) 214-3981
Mailing Address: 1215 N BEAVER ST FLAGSTAFF, AZ 86001
Mailing Phone: (928) 773-2033
Mailing Fax: (928) 214-3981
Is Sole Proprietor?: Yes
Enumeration Date: 06-15-2026
Last Update Date: 06-15-2026
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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: Dietitian, Registered
Taxonomy Code: 133V00000X
Type: Dietary & Nutritional Service Providers
License No.: 1060509
License State: AZ
Taxonomy Description: A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.

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 1982539599, 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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

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 5 → 10 → 1 9 → 18 → 9 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 + 1 + 6 + 2 + 1 + 0 + 3 + 1 + 8 + 5 + 1 + 8 + 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 1982539599.