DR. CARL BRUCE FEINSTEIN M.D.
NPI 1366587677
Psychiatry & Neurology - Child & Adolescent Psychiatry in Stanford, CA

NPI Status: Active since February 21, 2007

Contact Information

401 QUARRY RD
STANFORD, CA
ZIP 94305
Phone: (650) 723-5511
Fax: (650) 725-9544

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  • Individual
  • Male
  • Psychiatry & Neurology
  • Child & Adolescent Psychiatry

About CARL FEINSTEIN

This page provides the complete NPI Profile along with additional information for Carl Feinstein, a provider established in Stanford, California with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1366587677 assigned on February 2007. The practitioner's primary taxonomy code is 2084P0804X with license number G84411 (CA). The provider is registered as an individual and his NPI record was last updated May 2026.

NPI
1366587677
Provider Name
DR. CARL BRUCE FEINSTEIN M.D.
Gender
Male
Entity Type
Individual
Location Address
401 QUARRY RD STANFORD, CA 94305
Location Phone
(650) 723-5511
Location Fax
(650) 725-9544
Mailing Address
401 QUARRY ROAD STANFORD, CA 94305
Mailing Phone
(650) 723-5511
Mailing Fax
(650) 725-9544
Is Sole Proprietor?
Yes
Enumeration Date
02-21-2007
Last Update Date
05-31-2026
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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 Child & Adolescent Psychiatry

Taxonomy Code
2084P0804X
Type
Allopathic & Osteopathic Physicians
License No.
G84411
License State
CA
Taxonomy Description
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

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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 1366587677, 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 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
3
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
6
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
8
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
6
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
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 6 → 12 → 3 5 → 10 → 1 7 → 14 → 5 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 2 + 6 + 1 + 0 + 8 + 1 + 4 + 6 + 1 + 4 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1366587677.

Other Providers at the Same Location


The following 9 providers are registered at the same or a nearby location.

Psychiatry & Neurology (Psychiatry)
401 QUARRY RD, OCD CLINIC, ROOM 2363
STANFORD, CA 94305
Psychiatry & Neurology (Sleep Medicine)
401 QUARRY RD, SUITE 3301
STANFORD, CA 94305
Psychologist (Clinical Child & Adolescent)
401 QUARRY RD, CHILD PSYCHIATRY
PALO ALTO, CA 94305
Psychiatry & Neurology (Psychiatry)
401 QUARRY RD, MC 5719
STANFORD, CA 94305
Psychiatry & Neurology (Psychiatry)
401 QUARRY RD
STANFORD, CA 94305
Psychologist (Clinical)
401 QUARRY RD
STANFORD, CA 94305
Psychologist
401 QUARRY RD
STANFORD, CA 94305
Thoracic Surgery (Cardiothoracic Vascular Surgery)
401 QUARRY RD
STANFORD, CA 94305
Psychiatry & Neurology (Psychiatry)
401 QUARRY RD, SUITE 2204
STANFORD, CA 94305

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1366587677, enumerated as an "individual" on February 21, 2007.

The provider is located at 401 QUARRY RD STANFORD, CA 94305 and the phone number is (650) 723-5511.

Psychiatry & Neurology with taxonomy code 2084P0804X and a focus in Child & Adolescent Psychiatry.