KATELYN YARNOLD LCSW
NPI 1023731346
Social Worker in Santa Maria, CA

NPI Status: Active since September 21, 2022

Contact Information

1400 E CHURCH ST
SANTA MARIA, CA
ZIP 93454
Phone: (805) 739-3000

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

Individual
Female
Social Worker

About KATELYN YARNOLD

This page provides the complete NPI Profile along with additional information for Katelyn Yarnold, a provider established in Santa Maria, California with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1023731346 assigned on September 2022. The practitioner's primary taxonomy code is 104100000X with license number 85912 (CA). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI: 1023731346
Provider Name: KATELYN YARNOLD LCSW
Gender: Female
Entity Type: Individual
Location Address: 1400 E CHURCH ST SANTA MARIA, CA 93454
Location Phone: (805) 739-3000
Mailing Address: 235 S PALISADE DR SANTA MARIA, CA 93454
Mailing Phone: (805) 739-3561
Mailing Fax
Is Sole Proprietor?: No
Enumeration Date: 09-21-2022
Last Update Date: 04-30-2026
Code Navigator

A social worker like Katelyn Yarnold helps patients solve and cope with problems in their everyday lives, diagnoses and treats mental, behavioral, and emotional problems. Social workers help in wide range of situations, such as adopting a child, illness, divorce, or unemployment.

Location Map

Secondary Locations

5920 West Mall
Atascadero, CA 93422
(805) 466-0676
1102 E Clark Ave Ste 120A
Santa Maria, CA 93455
(805) 332-8185
895 Aerovista Pl Ste 103
San Luis Obispo, CA 93401
(805) 541-3200
4460 Broad St Ste 110
San Luis Obispo, CA 93401
(805) 597-6715
5075 S Bradley Rd Ste 131
Santa Maria, CA 93455
(805) 332-8155
2238 Bayview Heights Dr Ste G
Los Osos, CA 93402
(805) 534-1305
217 W Central Ave Ste G
Lompoc, CA 93436
(805) 735-4292
2271 S Depot St
Santa Maria, CA 93455
(805) 349-8514
1941 Johnson Ave Ste 301
San Luis Obispo, CA 93401
(805) 786-4111
685 Morro Ave Ste C
Morro Bay, CA 93442
(805) 772-7313
265 Posada Ln Ste B
Templeton, CA 93465
(805) 434-0900
235 S Palisade Dr
Santa Maria, CA 93454
(805) 739-3561
220 S Palisade Dr Ste 203
Santa Maria, CA 93454
(805) 354-7101
210 S Palisade Dr Ste 101
Santa Maria, CA 93454
(805) 922-0481
2 James Way Ste 209
Pismo Beach, CA 93449
(805) 549-6915
116 S Palisade Dr Ste 103
Santa Maria, CA 93454
(805) 922-8006
1745 N Broadway Ste 101
Santa Maria, CA 93454
(805) 739-3890
1941 Johnson Ave Ste 101
San Luis Obispo, CA 93401
(805) 782-8844
1941 Johnson Ave Ste 102
San Luis Obispo, CA 93401
(805) 782-8844
1560 Mesa Rd Ste 100
Nipomo, CA 93444
(805) 614-5640
901 Oak Park Blvd Ste 101
Pismo Beach, CA 93449
(805) 481-2205
1250 Peach St Ste B
San Luis Obispo, CA 93401
(805) 543-4043
697 W Tefft St
Nipomo, CA 93444
(805) 929-2272
2 James Way Ste 106
Pismo Beach, CA 93449
(805) 473-7665
116 S Palisade Dr Ste 200
Santa Maria, CA 93454
(805) 739-3968
1250 Peach St Ste A
San Luis Obispo, CA 93401
(805) 543-4043

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: Social Worker
Taxonomy Code: 104100000X
Type: Behavioral Health & Social Service Providers
License No.: 85912
License State: CA
Taxonomy Description: A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.

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 1023731346, 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 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 2 → 4 7 → 14 → 5 1 → 2 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 4 + 3 + 1 + 4 + 3 + 2 + 3 + 8 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1023731346.