MRS. JANET LYNN COSTA
NPI 1649613696
Rehabilitation Practitioner in Pleasant Hill, CA

NPI Status: Active since April 09, 2013

Contact Information

391 TAYLOR BLVD STE 100
PLEASANT HILL, CA
ZIP 94523
Phone: (925) 608-6571
Fax: (925) 608-6592

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

Individual
Female
Rehabilitation Practitioner

About JANET COSTA

This page provides the complete NPI Profile along with additional information for Janet Costa, a provider established in Pleasant Hill, California with a medical specialization in Rehabilitation Practitioner. The healthcare provider is registered in the NPI registry with number 1649613696 assigned on April 2013. The practitioner's primary taxonomy code is 225400000X. The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1649613696
Provider Name: MRS. JANET LYNN COSTA
Gender: Female
Entity Type: Individual
Location Address: 391 TAYLOR BLVD STE 100 PLEASANT HILL, CA 94523
Location Phone: (925) 608-6571
Location Fax: (925) 608-6592
Mailing Address: 391 TAYLOR BLVD STE 100 PLEASANT HILL, CA 94523
Mailing Phone: (925) 608-6571
Mailing Fax: (925) 608-6592
Is Sole Proprietor?: No
Enumeration Date: 04-09-2013
Last Update Date: 04-22-2025
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Location Map

Secondary Locations

1350 Arnold Dr Ste 102
Martinez, CA 94553
(925) 313-9562

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: Rehabilitation Practitioner
Taxonomy Code: 225400000X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Description: A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity.

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	101YM0800X	Behavioral Health & Social Service Providers	Counselor Mental Health	(CA)
2	171M00000X	Other Service Providers	Case Manager/Care Coordinator
3	172V00000X	Other Service Providers	Community Health Worker
4	175T00000X	Other Service Providers	Peer Specialist	MPSS-UYNCOH (CA)

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 1649613696, we treat the final digit (6) 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 74. The final step is to find the difference between that total and the next multiple of ten (80 - 74 = 6).

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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 6

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 4 → 8 6 → 12 → 3 3 → 6 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 8 + 9 + 1 + 2 + 1 + 6 + 6 + 1 + 8 + 24 = 74

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

The next multiple of ten after 74 is 80. The difference is the calculated check digit.

80 - 74 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1649613696.