CRYSTAL MICHELLE RAPP LMSW
NPI 1891671160
Social Worker in Lake Havasu City, AZ
NPI Status: Active since August 13, 2025
Contact Information
1951 MESQUITE AVE STE J
LAKE HAVASU CITY, AZ
ZIP 86403
Phone: (928) 230-7294
- Individual
- Female
- Social Worker
About CRYSTAL RAPP
This page provides the complete NPI Profile along with additional information for Crystal Rapp, a provider established in Lake Havasu City, Arizona with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1891671160 assigned on August 2025. The practitioner's primary taxonomy code is 104100000X with license number LMSW-17967 (AZ). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1891671160
- Provider Name
- CRYSTAL MICHELLE RAPP LMSW
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 1951 MESQUITE AVE STE J LAKE HAVASU CITY, AZ 86403
- Location Phone
- (928) 230-7294
- Mailing Address
- 2811 SUPERBA AVE KINGMAN, AZ 86401
- Mailing Phone
- (928) 377-7273
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 08-13-2025
- Last Update Date
- 08-13-2025
- Code Navigator
A social worker like Crystal Rapp 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
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.
- LMSW-17967
- License State
- AZ
- 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.
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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 1891671160, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 60 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
LAKE HAVASU CITY, AZ 86403
LAKE HAVASU CITY, AZ 86403
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1891671160, enumerated as an "individual" on August 13, 2025.
The provider is located at 1951 MESQUITE AVE STE J LAKE HAVASU CITY, AZ 86403 and the phone number is (928) 230-7294.
Social Worker with taxonomy code 104100000X.
