MATTHEW GUMB LPC
NPI 1255714895
Counselor - Professional in Knoxville, TN

NPI Status: Active since July 01, 2015

Contact Information

9129 CROSS PARK DR STE 100
KNOXVILLE, TN
ZIP 37923
Phone: (865) 408-8854

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  • Individual
  • Male
  • Counselor
  • Professional
  • Opted-Out Medicare

About MATTHEW GUMB

This page provides the complete NPI Profile along with additional information for Matthew Gumb, a provider established in Knoxville, Tennessee with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1255714895 assigned on July 2015. The practitioner's primary taxonomy code is 101YP2500X with license number 11469 (NC). The provider is registered as an individual and his NPI record was last updated June 2026.

NPI
1255714895
Provider Name
MATTHEW GUMB LPC
Gender
Male
Entity Type
Individual
Location Address
9129 CROSS PARK DR STE 100 KNOXVILLE, TN 37923
Location Phone
(865) 408-8854
Mailing Address
9129 CROSS PARK DR STE 100 KNOXVILLE, TN 37923
Mailing Phone
(865) 408-8854
Is Sole Proprietor?
Yes
Enumeration Date
07-01-2015
Last Update Date
06-26-2026
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The provider doesn't accept Medicare and has signed an affidavit to be excluded from the Medicare program. If you are a Medicare beneficiary this means a provider can charge whatever they want for services rendered but must follow certain rules to do so. Matthew Gumb opted out of Medicare effective on 05-02-2024 until 05-02-2026. Opt out periods last for two years and cannot be terminated unless the provider is opting out for the very first time and the affidavit is terminated no later than 90 days after the opt out effective date. Opt-out affidavits might renew automatically renew every two years. The provider opted out of Medicare and cannot order and refer services to other healthcare providers.

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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

Counselor Professional

Taxonomy Code
101YP2500X
Type
Behavioral Health & Social Service Providers
License No.
11469
License State
NC

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)
1101YM0800XBehavioral Health & Social Service Providers

Counselor
Mental Health

11469 (NC)
2101YM0800XBehavioral Health & Social Service Providers

Counselor
Mental Health

5873 (TN)

Medicare Participation & PECOS Enrollment Status

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Opted-Out of Medicare? Yes

  • Opt-Out Effective Date: 05-02-2024

  • Opt-Out End Date: 05-02-2026

  • Eligible to Order and Refer? No

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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 1255714895, 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 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
5
Doubled → 10 → 1 + 0
Pos 4
5
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
1
Unchanged
Pos 7
4
Doubled → 8
Pos 8
8
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
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 5 → 10 → 1 7 → 14 → 5 4 → 8 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 0 + 5 + 1 + 4 + 1 + 8 + 8 + 1 + 8 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1255714895.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Psychologist
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Psychologist (Clinical)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Psychologist (School)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Social Worker (Clinical)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Nurse Practitioner (Psychiatric/Mental Health)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Social Worker (Clinical)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Psychologist (Clinical)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Psychologist (Clinical)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Psychologist (School)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Pediatrics (Developmental - Behavioral Pediatrics)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923
Nurse Practitioner (Psychiatric/Mental Health)
9129 CROSS PARK DR STE 100
KNOXVILLE, TN 37923

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1255714895, enumerated as an "individual" on July 01, 2015.

The provider is located at 9129 CROSS PARK DR STE 100 KNOXVILLE, TN 37923 and the phone number is (865) 408-8854.

Counselor with taxonomy code 101YP2500X and a focus in Professional.