PETRA ARMSTRONG LMHCA
NPI 1205762291
Counselor - Mental Health in Lacey, WA

NPI Status: Active since June 18, 2026

Contact Information

4570 AVERY LN SE
LACEY, WA
ZIP 98503
Phone: (360) 464-7935

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  • Individual
  • Female
  • Counselor
  • Mental Health

About PETRA ARMSTRONG

This page provides the complete NPI Profile along with additional information for Petra Armstrong, a provider established in Lacey, Washington with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1205762291 assigned on June 2026. The practitioner's primary taxonomy code is 101YM0800X with license number MHCA.MC.70088973 (WA). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI
1205762291
Provider Name
PETRA ARMSTRONG LMHCA
Gender
Female
Entity Type
Individual
Location Address
4570 AVERY LN SE LACEY, WA 98503
Location Phone
(360) 464-7935
Mailing Address
930 22ND ST APT 305 BELLINGHAM, WA 98225
Mailing Phone
(360) 707-8293
Is Sole Proprietor?
Yes
Enumeration Date
06-18-2026
Last Update Date
06-18-2026
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A mental health counselor like Petra Armstrong provides treatment to individuals, families, couples, and groups for mental and emotional health issues and relationship problems. Mental health counselors treat clients with a variety of conditions, including anxiety, depression, grief, low self-esteem, stress, and suicidal impulses.

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

Counselor Mental Health

Taxonomy Code
101YM0800X
Type
Behavioral Health & Social Service Providers
License No.
MHCA.MC.70088973
License State
WA

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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 1205762291, 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 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
2
Unchanged
Pos 3
0
Doubled → 0
Pos 4
5
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
6
Unchanged
Pos 7
2
Doubled → 4
Pos 8
2
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
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 0 → 0 7 → 14 → 5 2 → 4 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 + 0 + 5 + 1 + 4 + 6 + 4 + 2 + 1 + 8 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1205762291.

Other Providers at the Same Location


The following 5 providers are registered at the same or a nearby location.

Counselor (Mental Health)
4570 AVERY LN SE
LACEY, WA 98503
Counselor (Mental Health)
4570 AVERY LN SE
LACEY, WA 98503
Counselor (Mental Health)
4570 AVERY LN SE
LACEY, WA 98503
Counselor (Mental Health)
4570 AVERY LN SE
LACEY, WA 98503
Counselor (Mental Health)
4570 AVERY LN SE
LACEY, WA 98503

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1205762291, enumerated as an "individual" on June 18, 2026.

The provider is located at 4570 AVERY LN SE LACEY, WA 98503 and the phone number is (360) 464-7935.

Counselor with taxonomy code 101YM0800X and a focus in Mental Health.