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

OLIVIA JEAN GILLESPIE
NPI 1205755055
Speech-Language Pathologist in Fishers, IN

Active since July 14, 2026
9885 E 116TH ST STE 400, FISHERS, IN 46037(317) 682-1872 Get Directions

NPPES record added: July 14, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Female
  • Speech-Language Pathologist

About OLIVIA GILLESPIE

This page provides the complete NPI Profile along with additional information for Olivia Gillespie, a provider established in Fishers, Indiana with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1205755055 assigned on July 2026. The practitioner's primary taxonomy code is 235Z00000X. The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1205755055
Provider Name
OLIVIA JEAN GILLESPIE
Gender
Female
Entity Type
Individual
Location Address
9885 E 116TH ST STE 400 FISHERS, IN 46037
Location Phone
(317) 682-1872
Mailing Address
208 NORTHSHORE BLVD ANDERSON, IN 46011
Is Sole Proprietor?
No
Enumeration Date
07-14-2026
Last Update Date
07-14-2026
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Location Map

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
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.

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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 1205755055, we treat the final digit (5) 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 45. The final step is to find the difference between that total and the next multiple of ten (50 - 45 = 5).

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
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
0
Doubled → 0
Pos 4
5
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
5
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
0
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
5
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 0 → 0 7 → 14 → 5 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 + 2 + 0 + 5 + 1 + 4 + 5 + 1 + 0 + 0 + 1 + 0 + 24 = 45

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

The next multiple of ten after 45 is 50. The difference is the calculated check digit.

50 - 45 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1205755055.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Physical Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Physical Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Physical Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Physical Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Occupational Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Physical Therapist
9885 E 116TH ST STE 400
FISHERS, IN 46037
Speech-Language Pathologist
9885 E 116TH ST STE 400
FISHERS, IN 46037

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1205755055, enumerated as an "individual" on July 14, 2026.

The provider is located at 9885 E 116TH ST STE 400 FISHERS, IN 46037 and the phone number is (317) 682-1872.

Speech-Language Pathologist with taxonomy code 235Z00000X.