DR. SARAH ALYOUSEF BDS
NPI 1669191615
Oral Medicine in Boston, MA

NPI Status: Active since August 23, 2022

Contact Information

1 KNEELAND ST FL 6
BOSTON, MA
ZIP 02111
Phone: (617) 636-3932

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Oral Medicine

About SARAH ALYOUSEF

This page provides the complete NPI Profile along with additional information for Sarah Alyousef, a provider established in Boston, Massachusetts with a medical specialization in Oral Medicine. The healthcare provider is registered in the NPI registry with number 1669191615 assigned on August 2022. The practitioner's primary taxonomy code is 125Q00000X with license number DL100365 (MA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1669191615
Provider Name: DR. SARAH ALYOUSEF BDS
Gender: Female
Entity Type: Individual
Location Address: 1 KNEELAND ST FL 6 BOSTON, MA 02111
Location Phone: (617) 636-3932
Mailing Address: 110 BEVERLY ST APT 533 BOSTON, MA 02114
Mailing Phone: (917) 915-1303
Is Sole Proprietor?: No
Enumeration Date: 08-23-2022
Last Update Date: 03-30-2025
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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: Oral Medicine
Taxonomy Code: 125Q00000X
Type: Dental Providers
License No.: DL100365
License State: MA
Taxonomy Description: Oral Medicine is the specialty of dentistry responsible for the oral health care of medically complex patients and for the diagnosis and management of medically related diseases, disorders and conditions affecting the oral and maxillofacial region. Oral Medicine specialists have training and expertise in the diagnosis and management of oral and mucosal diseases, medical management of maxillofacial pathologies from hematology and oncology, organ transplant services, autoimmune disorders, including acute and chronic pain conditions of oral & maxillofacial region. Oral Medicine specialists co-manage oral and maxillofacial conditions and diseases in collaboration with medical specialists and other dentists in hospitals and outpatient medical clinics, particularly in the management of patients with complex medical conditions requiring multidisciplinary healthcare intervention.

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 1669191615, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 2

Check

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 6 → 12 → 3 1 → 2 1 → 2 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 2 + 9 + 2 + 9 + 2 + 6 + 2 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1669191615.