MALLORY ZWERDLING MS, LCPCC
NPI 1699329821
Counselor - Professional in Portland, ME

NPI Status: Active since July 25, 2019

Contact Information

52 BOLTON ST
PORTLAND, ME
ZIP 04102
Phone: (207) 479-7841

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  • Individual
  • Female
  • Counselor
  • Professional

About MALLORY ZWERDLING

This page provides the complete NPI Profile along with additional information for Mallory Zwerdling, a provider established in Portland, Maine with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1699329821 assigned on July 2019. The practitioner's primary taxonomy code is 101YP2500X with license number XL5296 (ME). The provider is registered as an individual and her NPI record was last updated 6 years ago.

NPI
1699329821
Provider Name
MALLORY ZWERDLING MS, LCPCC
Gender
Female
Entity Type
Individual
Location Address
52 BOLTON ST PORTLAND, ME 04102
Location Phone
(207) 479-7841
Mailing Address
52 BOLTON ST PORTLAND, ME 04102
Mailing Phone
(207) 479-7841
Is Sole Proprietor?
Yes
Enumeration Date
07-25-2019
Last Update Date
01-31-2020
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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.
XL5296
License State
ME

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)
1101Y00000XBehavioral Health & Social Service Providers

Counselor

XL5296 (ME)
2101YM0800XBehavioral Health & Social Service Providers

Counselor
Mental Health

XL5296 (ME)
3102L00000XBehavioral Health & Social Service Providers

Psychoanalyst

XL5296 (ME)

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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 1699329821, we treat the final digit (1) 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 79. The final step is to find the difference between that total and the next multiple of ten (80 - 79 = 1).

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
6
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
9
Unchanged
Pos 5
3
Doubled → 6
Pos 6
2
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
8
Unchanged
Pos 9
2
Doubled → 4
Check
1
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 9 → 18 → 9 3 → 6 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 8 + 9 + 6 + 2 + 1 + 8 + 8 + 4 + 24 = 79

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

The next multiple of ten after 79 is 80. The difference is the calculated check digit.

80 - 79 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1699329821.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Clinic/Center (Adult Mental Health)
52 BOLTON ST
PORTLAND, ME 04102

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1699329821, enumerated as an "individual" on July 25, 2019.

The provider is located at 52 BOLTON ST PORTLAND, ME 04102 and the phone number is (207) 479-7841.

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