RUSSELL H HORWITZ MD, PHD
NPI 1477744597
Psychiatry & Neurology - Psychiatry in Potomac, MD

NPI Status: Active since August 05, 2007

Contact Information

8201 KILLEAN WAY
POTOMAC, MD
ZIP 20854
Phone: (646) 708-1986

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  • Individual
  • Male
  • Psychiatry & Neurology
  • Psychiatry

About RUSSELL HORWITZ

This page provides the complete NPI Profile along with additional information for Russell Horwitz, a provider established in Potomac, Maryland with a medical specialization in Psychiatry & Neurology, focusing in psychiatry . The healthcare provider is registered in the NPI registry with number 1477744597 assigned on August 2007. The practitioner's primary taxonomy code is 2084P0800X with license number D0076586 (MD). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1477744597
Provider Name
RUSSELL H HORWITZ MD, PHD
Gender
Male
Entity Type
Individual
Location Address
8201 KILLEAN WAY POTOMAC, MD 20854
Location Phone
(646) 708-1986
Mailing Address
8201 KILLEAN WAY POTOMAC, MD 20854
Mailing Phone
(646) 708-1986
Is Sole Proprietor?
No
Enumeration Date
08-05-2007
Last Update Date
06-20-2025
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A psychiatrist like Russell Horwitz 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.
D0076586
License State
MD
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 1477744597, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).

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
4
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
7
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
4
Unchanged
Pos 7
4
Doubled → 8
Pos 8
5
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
7
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 7 → 14 → 5 7 → 14 → 5 4 → 8 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 4 + 7 + 1 + 4 + 4 + 8 + 5 + 1 + 8 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1477744597.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1477744597, enumerated as an "individual" on August 05, 2007.

The provider is located at 8201 KILLEAN WAY POTOMAC, MD 20854 and the phone number is (646) 708-1986.

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