MS. NILFA MARIA GUZMAN LPC
NPI 1851514483
Counselor - Professional in Washington, DC
NPI Status: Active since April 11, 2007
Contact Information
1901 D ST SE
WASHINGTON, DC
ZIP 20003
Phone: (202) 298-0448
NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Female
- Counselor
- Professional
About NILFA GUZMAN
This page provides the complete NPI Profile along with additional information for Nilfa Guzman, a provider established in Washington, District Of Columbia with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1851514483 assigned on April 2007. The practitioner's primary taxonomy code is 101YP2500X with license number PRC1097 (DC). The provider is registered as an individual and her NPI record was last updated 19 years ago.
- NPI
- 1851514483
- Provider Name
- MS. NILFA MARIA GUZMAN LPC
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 1901 D ST SE WASHINGTON, DC 20003
- Location Phone
- (202) 298-0448
- Mailing Address
- 3001 VEAZEY TER NW APT 1124 WASHINGTON, DC 20008
- Mailing Phone
- (202) 364-0956
- Is Sole Proprietor?
- No
- Enumeration Date
- 04-11-2007
- Last Update Date
- 07-08-2007
- Code Navigator
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 Professional
- Taxonomy Code
- 101YP2500X
- Type
- Behavioral Health & Social Service Providers
- License No.
- PRC1097
- License State
- DC
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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 1851514483, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).
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 57 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
WASHINGTON, DC 20003
WASHINGTON, DC 20003
WASHINGTON, DC 20003
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1851514483, enumerated as an "individual" on April 11, 2007.
The provider is located at 1901 D ST SE WASHINGTON, DC 20003 and the phone number is (202) 298-0448.
Counselor with taxonomy code 101YP2500X and a focus in Professional.
