JOHNNA CHARLTON MA CCC-SLP
NPI 1154165850
Speech-Language Pathologist in Auburn, ME

NPI Status: Active since June 19, 2024

Contact Information

730 CENTER ST STE 9
AUBURN, ME
ZIP 04210
Phone: (207) 783-3450

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

Individual
Female
Speech-Language Pathologist

About JOHNNA CHARLTON

This page provides the complete NPI Profile along with additional information for Johnna Charlton, a provider established in Auburn, Maine with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1154165850 assigned on June 2024. The practitioner's primary taxonomy code is 235Z00000X with license number SP4357 (ME). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1154165850
Provider Name: JOHNNA CHARLTON MA CCC-SLP
Gender: Female
Entity Type: Individual
Location Address: 730 CENTER ST STE 9 AUBURN, ME 04210
Location Phone: (207) 783-3450
Mailing Address: 820 MAIN ST APT 201 WESTBROOK, ME 04092
Is Sole Proprietor?: No
Enumeration Date: 06-19-2024
Last Update Date: 04-24-2025
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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: Speech-Language Pathologist
Taxonomy Code: 235Z00000X
Type: Speech, Language and Hearing Service Providers
License No.: SP4357
License State: ME
Taxonomy Description: The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

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 1154165850, 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 50. The final step is to find the difference between that total and the next multiple of ten (50 - 50 = 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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 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 5 → 10 → 1 1 → 2 5 → 10 → 1 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 0 + 4 + 2 + 6 + 1 + 0 + 8 + 1 + 0 + 24 = 50

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

The next multiple of ten after 50 is 50. The difference is the calculated check digit.

50 - 50 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1154165850.