AVA HOLZ
NPI 1376470609
Social Worker - Clinical in Denver, CO

NPI Status: Active since May 08, 2026

Contact Information

671 N GRANT ST
DENVER, CO
ZIP 80203
Phone: (720) 445-9979

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  • Individual
  • Female
  • Social Worker
  • Clinical

About AVA HOLZ

This page provides the complete NPI Profile along with additional information for Ava Holz, a provider established in Denver, Colorado with a medical specialization in Social Worker, focusing in clinical . The healthcare provider is registered in the NPI registry with number 1376470609 assigned on May 2026. The practitioner's primary taxonomy code is 1041C0700X. The provider is registered as an individual and her NPI record was last updated May 2026.

NPI
1376470609
Provider Name
AVA HOLZ
Gender
Female
Entity Type
Individual
Location Address
671 N GRANT ST DENVER, CO 80203
Location Phone
(720) 445-9979
Mailing Address
768 N OGDEN ST APT 5 DENVER, CO 80218
Mailing Phone
(720) 772-8816
Is Sole Proprietor?
No
Enumeration Date
05-08-2026
Last Update Date
05-08-2026
Code Navigator

A clinical social worker like Ava Holz is licensed to diagnose and treat mental, behavioral, and emotional disorders. A clinical social worker helps patients develop strategies to change behavior or cope with difficult situations and refer patients to other resources or services, such as support groups or other mental health professionals.

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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

Social Worker Clinical

Taxonomy Code
1041C0700X
Type
Behavioral Health & Social Service Providers
License State
CO
Taxonomy Description
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.

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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 1376470609, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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
3
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
6
Unchanged
Pos 5
4
Doubled → 8
Pos 6
7
Unchanged
Pos 7
0
Doubled → 0
Pos 8
6
Unchanged
Pos 9
0
Doubled → 0
Check
9
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 7 → 14 → 5 4 → 8 0 → 0 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 4 + 6 + 8 + 7 + 0 + 6 + 0 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1376470609.

Other Providers at the Same Location


The following 12 providers are registered at the same or a nearby location.

Psychologist
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203
Social Worker
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203
Counselor (Professional)
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203
Social Worker
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203
Counselor (Professional)
671 N GRANT ST
DENVER, CO 80203
Counselor (Professional)
671 N GRANT ST
DENVER, CO 80203
Social Worker (Clinical)
671 N GRANT ST
DENVER, CO 80203

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1376470609, enumerated as an "individual" on May 08, 2026.

The provider is located at 671 N GRANT ST DENVER, CO 80203 and the phone number is (720) 445-9979.

Social Worker with taxonomy code 1041C0700X and a focus in Clinical.