SONIA RADU
NPI 1811836125
Psychiatry & Neurology - Psychiatry in Boston, MA

NPI Status: Active since March 25, 2026

Contact Information

800 WASHINGTON ST
BOSTON, MA
ZIP 02111
Phone: (617) 636-5000

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  • Individual
  • Female
  • Psychiatry & Neurology
  • Psychiatry

About SONIA RADU

This page provides the complete NPI Profile along with additional information for Sonia Radu, a provider established in Boston, Massachusetts with a medical specialization in Psychiatry & Neurology, focusing in psychiatry . The healthcare provider is registered in the NPI registry with number 1811836125 assigned on March 2026. The practitioner's primary taxonomy code is 2084P0800X with license number 3020437 (MA). The provider is registered as an individual and her NPI record was last updated May 2026.

NPI
1811836125
Provider Name
SONIA RADU
Gender
Female
Entity Type
Individual
Location Address
800 WASHINGTON ST BOSTON, MA 02111
Location Phone
(617) 636-5000
Mailing Address
800 WASHINGTON ST BOSTON, MA 02111
Is Sole Proprietor?
No
Enumeration Date
03-25-2026
Last Update Date
05-04-2026
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A psychiatrist like Sonia Radu are primary mental health physicians diagnose and treat mental illnesses through psychotherapy, psychoanalysis, hospitalization and medication. Psychiatrist help patients find solutions through changes in their behavioral patterns, explorations of experiences, group and family therapy.

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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

Psychiatry & Neurology Psychiatry

Taxonomy Code
2084P0800X
Type
Allopathic & Osteopathic Physicians
License No.
3020437
License State
MA
Taxonomy Description
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

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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 1811836125, 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 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
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
1
Doubled → 2
Pos 4
1
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
3
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
1
Unchanged
Pos 9
2
Doubled → 4
Check
5
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 1 → 2 8 → 16 → 7 6 → 12 → 3 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 2 + 1 + 1 + 6 + 3 + 1 + 2 + 1 + 4 + 24 = 55

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

The next multiple of ten after 55 is 60. The difference is the calculated check digit.

60 - 55 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1811836125.

Other Providers at the Same Location


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

Internal Medicine
800 WASHINGTON ST, BOX 63
BOSTON, MA 02111
Psychiatry & Neurology (Psychosomatic Medicine)
800 WASHINGTON ST, TUFTS MEDICAL CENTER BOX 1007
BOSTON, MA 02111
Pediatrics
800 WASHINGTON ST, DEPT. OF PEDIATRICS
BOSTON, MA 02111
Psychiatry & Neurology (Neurology)
800 WASHINGTON ST, #314
BOSTON, MA 02111
Pathology (Clinical Pathology/Laboratory Medicine)
800 WASHINGTON ST, BOX 115
BOSTON, MA 02111
Nurse Practitioner
800 WASHINGTON ST, GI LIVER GROUP P.C.TUFTS MEDICAL CENTER
BOSTON, MA 02111
Pediatrics (Developmental - Behavioral Pediatrics)
800 WASHINGTON ST, BOX 334
BOSTON, MA 02111
Pediatrics
800 WASHINGTON ST, BOX 286 DEPT. OF PEDIATRICS
BOSTON, MA 02111
Specialist
800 WASHINGTON ST, # 450
BOSTON, MA 02111
Anesthesiology
800 WASHINGTON ST, TUFT-NEMC BOX 298
BOSTON, MA 02111
Pediatrics (Developmental - Behavioral Pediatrics)
800 WASHINGTON ST, CCSN # 334
BOSTON, MA 02111
Pediatrics (Pediatric Hematology-Oncology)
800 WASHINGTON ST, FLOATING HOSPITAL FOR CHILDREN AT TUFTS MEDICAL CENTER
BOSTON, MA 02111
Surgery
800 WASHINGTON ST, BOX 7105
BOSTON, MA 02111
Pediatrics (Pediatric Pulmonology)
800 WASHINGTON ST, TMC BOX# 343
BOSTON, MA 02111
Pediatrics (Pediatric Cardiology)
800 WASHINGTON ST, #313
BOSTON, MA 02111
Orthopaedic Surgery (Hand Surgery)
800 WASHINGTON ST, BOX 26
BOSTON, MA 02111
Pediatrics
800 WASHINGTON ST, GENERAL PEDIATRICS - FLOATING HOSPITAL FOR CHILDREN
BOSTON, MA 02111
Pediatrics (Neonatal-Perinatal Medicine)
800 WASHINGTON ST
BOSTON, MA 02111
Emergency Medicine
800 WASHINGTON ST, BOX #311
BOSTON, MA 02111
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
800 WASHINGTON ST
BOSTON, MA 02111

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1811836125, enumerated as an "individual" on March 25, 2026.

The provider is located at 800 WASHINGTON ST BOSTON, MA 02111 and the phone number is (617) 636-5000.

Psychiatry & Neurology with taxonomy code 2084P0800X and a focus in Psychiatry.