THREE21 INC.
NPI 1588556492
In Home Supportive Care in Lutherville, MD
NPI Status: Active since July 16, 2025
Contact Information
1313 YORK RD STE 3
LUTHERVILLE, MD
ZIP 21093
Phone: (720) 443-7858
- Organization
- In Home Supportive Care
About THREE21 INC.
This page provides the complete NPI Profile along with additional information for Three21 Inc., a provider established in Lutherville, Maryland operating as a In Home Supportive Care. The healthcare provider is registered in the NPI registry with number 1588556492 assigned on July 2025. The practitioner's primary taxonomy code is 253Z00000X. The provider is registered as an organization and their NPI record was last updated July 2025. The authorized official of this NPI record is Mr. Patrick Sullivan (Owner)
- NPI
- 1588556492
- Provider Name
- THREE21 INC.
- Entity Type
- Organization
- Location Address
- 1313 YORK RD STE 3 LUTHERVILLE, MD 21093
- Location Phone
- (720) 443-7858
- Mailing Address
- 1513 W JOPPA RD TOWSON, MD 21204
- Mailing Phone
- (720) 443-7858
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 07-16-2025
- Last Update Date
- 07-17-2025
- 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
In Home Supportive Care
- Taxonomy Code
- 253Z00000X
- Type
- Agencies
- Taxonomy Description
- An In Home Supportive Care Agency provides services in the patient's home with the goal of enabling the patient to remain at home. The services provided may include personal care services such as hands-on assistance with activities of daily living (ADLs), e.g., eating, bathing, dressing, and bladder and bowel requirements; homemaker services and instrumental activities of daily living (IADLs), e.g., taking medications, shopping for groceries, laundry, housekeeping, and companionship; and/or supervision or cuing so that a person can perform tasks themselves.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 5 | 8 | 8 | 5 | 5 | 6 | 4 | 9 | 2 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 5 | 16 | 8 | 10 | 5 | 12 | 4 | 18 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 5 + 1 + 6 + 8 + 1 + 0 + 5 + 1 + 2 + 4 + 1 + 8 + 24 = 68 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 70 - 68 = 2 | 2 | ||||||||
The NPI number 1588556492 is valid because the calculated check digit 2 using the Luhn validation algorithm matches the last digit of the original NPI number.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1588556492, enumerated as an "organization" on July 16, 2025.
The provider is located at 1313 YORK RD STE 3 LUTHERVILLE, MD 21093 and the phone number is (720) 443-7858.
In Home Supportive Care with taxonomy code 253Z00000X.
