DYAN ALAYNE DREISBACH M.D.
NPI 1396980520
Psychologist - Prescribing (Medical) in San Francisco, CA

NPI Status: Active since December 02, 2008

Contact Information

1625 CARROLL AVE
SAN FRANCISCO, CA
ZIP 94124
Phone: (415) 822-8200
Fax: (415) 822-6822

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

Individual
Female
Psychologist
Prescribing (Medical)

About DYAN DREISBACH

This page provides the complete NPI Profile along with additional information for Dyan Dreisbach, a provider established in San Francisco, California with a medical specialization in Psychologist, focusing in prescribing (medical) . The healthcare provider is registered in the NPI registry with number 1396980520 assigned on December 2008. The practitioner's primary taxonomy code is 103TP0016X with license number A41399 (CA). The provider is registered as an individual and her NPI record was last updated 18 years ago.

NPI: 1396980520
Provider Name: DYAN ALAYNE DREISBACH M.D.
Gender: Female
Entity Type: Individual
Location Address: 1625 CARROLL AVE SAN FRANCISCO, CA 94124
Location Phone: (415) 822-8200
Location Fax: (415) 822-6822
Mailing Address: 1625 CARROLL AVE SAN FRANCISCO, CA 94124
Mailing Phone: (415) 822-8200
Mailing Fax: (415) 822-6822
Is Sole Proprietor?: No
Enumeration Date: 12-02-2008
Last Update Date: 12-02-2008
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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: Psychologist Prescribing (Medical)
Taxonomy Code: 103TP0016X
Type: Behavioral Health & Social Service Providers
License No.: A41399
License State: CA
Taxonomy Description: A licensed, doctoral-level psychologist authorized to prescribe and has undergone specialized education and training in preparation for prescriptive practice and has passed an examination accepted by the state board of psychology relevant to establishing competence for prescribing, and has received from the state board of psychology a current certificate granting prescriptive authority, which has not been revoked or suspended.

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 1396980520, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 4

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 9 → 18 → 9 9 → 18 → 9 0 → 0 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 8 + 6 + 1 + 8 + 8 + 0 + 5 + 4 + 24 = 70

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

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

70 - 70 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1396980520.