JOHN CHRISTIAN MICHAEL CROSBY BCBA, LABA
NPI 1285477661
Behavior Analyst in Plymouth, MA

NPI Status: Active since June 14, 2024

Contact Information

5 NATALIE WAY
PLYMOUTH, MA
ZIP 02360
Phone: (508) 858-5991

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

Individual
Male
Behavior Analyst

About JOHN CHRISTIAN CROSBY

This page provides the complete NPI Profile along with additional information for John Christian Crosby, a provider established in Plymouth, Massachusetts with a medical specialization in Behavior Analyst. The healthcare provider is registered in the NPI registry with number 1285477661 assigned on June 2024. The practitioner's primary taxonomy code is 103K00000X with license number 1-25-84581 (MA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1285477661
Provider Name: JOHN CHRISTIAN MICHAEL CROSBY BCBA, LABA
Gender: Male
Entity Type: Individual
Location Address: 5 NATALIE WAY PLYMOUTH, MA 02360
Location Phone: (508) 858-5991
Mailing Address: 5 NATALIE WAY PLYMOUTH, MA 02360
Mailing Phone: (508) 858-5991
Is Sole Proprietor?: No
Enumeration Date: 06-14-2024
Last Update Date: 11-04-2025
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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: Behavior Analyst
Taxonomy Code: 103K00000X
Type: Behavioral Health & Social Service Providers
License No.: 1-25-84581
License State: MA
Taxonomy Description: A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	103K00000X	Behavioral Health & Social Service Providers	Behavior Analyst	LABA10001849 (MA)
2	106S00000X	Behavioral Health & Social Service Providers	Behavior Technician	RBT-21-165149 (MA)

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 1285477661, 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 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 → 8

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 2

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 4 → 8 7 → 14 → 5 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 6 + 5 + 8 + 7 + 1 + 4 + 6 + 1 + 2 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1285477661.