DAWIT WORKU KASSA
NPI 1144011859
Obstetrics & Gynecology in Boston, MA

NPI Status: Active since May 13, 2025

Contact Information

800 WASHINGTON STREET
BOSTON, MA
ZIP 02111
Phone: (617) 636-2229

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  • Individual
  • Male
  • Obstetrics & Gynecology

About DAWIT KASSA

This page provides the complete NPI Profile along with additional information for Dawit Kassa, a women's health care provider established in Boston, Massachusetts with a medical specialization in Obstetrics & Gynecology. The healthcare provider is registered in the NPI registry with number 1144011859 assigned on May 2025. The practitioner's primary taxonomy code is 207V00000X with license number 3018685 (MA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1144011859
Provider Name
DAWIT WORKU KASSA
Gender
Male
Entity Type
Individual
Location Address
800 WASHINGTON STREET BOSTON, MA 02111
Location Phone
(617) 636-2229
Mailing Address
800 WASHINGTON STREET BOSTON, MA 02111
Mailing Phone
(617) 636-2229
Is Sole Proprietor?
No
Enumeration Date
05-13-2025
Last Update Date
11-04-2025
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Women's health care providers like Dawit Kassa treat and diagnose diseases and conditions that affect a woman's physical and emotional health. Women's health professionals come from a variety of different specialties, including obstetrician/gynecologists, general surgeons, perinatologists, physician assistants, nurse practitioners or nurse midwives. A women's health provider might help you with family planning, breast care, pregnancy and child birth, osteoporosis, menopause, heart disease, etc.

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

Obstetrics & Gynecology

Taxonomy Code
207V00000X
Type
Allopathic & Osteopathic Physicians
License No.
3018685
License State
MA
Taxonomy Description
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

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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 1144011859, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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
1
Unchanged
Pos 3
4
Doubled → 8
Pos 4
4
Unchanged
Pos 5
0
Doubled → 0
Pos 6
1
Unchanged
Pos 7
1
Doubled → 2
Pos 8
8
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
9
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 4 → 8 0 → 0 1 → 2 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 8 + 4 + 0 + 1 + 2 + 8 + 1 + 0 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1144011859.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Pediatrics
800 WASHINGTON STREET, TUFTS MEDICAL CENTER
BOSTON, MA 02111
Pediatrics
800 WASHINGTON STREET, BOX 7105
BOSTON, MA 02111
Pathology (Anatomic Pathology & Clinical Pathology)
800 WASHINGTON STREET, DEPARTMENT OF PATHOLOGY AND LABORATORY MEDICINE
BOSTON, MA 02111
Pathology (Anatomic Pathology & Clinical Pathology)
800 WASHINGTON STREET, BOX 836 TUFTS MEDICAL CENTER
BOSTON, MA 02111
Surgery (Surgical Critical Care)
800 WASHINGTON STREET
BOSTON, MA 02111
Pediatrics
800 WASHINGTON STREET, PRATT PEDIATRIC ASSOCIATES, INC
BOSTON, MA 02111
Radiology (Diagnostic Radiology)
800 WASHINGTON STREET
BOSTON, MA 02111
Family Medicine
800 WASHINGTON STREET, BOX 1013
BOSTON, MA 02111
Pediatrics (Neonatal-Perinatal Medicine)
800 WASHINGTON STREET, #2
BOSTON, MA 02111
Specialist/Technologist, Other
800 WASHINGTON STREET, #4488
BOSTON, MA 02111
Internal Medicine (Rheumatology)
800 WASHINGTON STREET
BOSTON, MA 02111
Internal Medicine
800 WASHINGTON STREET, #327
BOSTON, MA 02111
Student in an Organized Health Care Education/Training Program
800 WASHINGTON STREET, TUFTS MEDICAL CNTER
BOSTON, MA 02111
Anesthesiology
800 WASHINGTON STREET, TUFTS NEW ENGLAND MEDICAL CENTER
BOSTON, MA 02111
General Acute Care Hospital
800 WASHINGTON STREET, TUFTS MEDICAL CENTER
BOSTON, MA 02111
Pediatrics
800 WASHINGTON STREET, TUFTS MEDICAL CENTER BOX 286
BOSTON, MA 02111
Internal Medicine
800 WASHINGTON STREET
BOSTON, MA 02111
Surgery (Vascular Surgery)
800 WASHINGTON STREET
BOSTON, MA 02111
Radiology (Diagnostic Radiology)
800 WASHINGTON STREET, BOX# 299
BOSTON, MA 02111
Pathology (Anatomic Pathology & Clinical Pathology)
800 WASHINGTON STREET, TUFTS MEDICAL CENTER, BOX 115
BOSTON, MA 02111

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1144011859, enumerated as an "individual" on May 13, 2025.

The provider is located at 800 WASHINGTON STREET BOSTON, MA 02111 and the phone number is (617) 636-2229.

Obstetrics & Gynecology with taxonomy code 207V00000X.