MARK WEIST PHD
NPI 1467663989
Psychologist - Prescribing (Medical) in Baltimore, MD

NPI Status: Active since May 25, 2007

Contact Information

701 W PRATT ST
BALTIMORE, MD
ZIP 21201
Phone: (410) 328-5881
Fax: (717) 428-0518

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

Individual
Male
Psychologist
Prescribing (Medical)

About MARK WEIST

This page provides the complete NPI Profile along with additional information for Mark Weist, a provider established in Baltimore, Maryland with a medical specialization in Psychologist, focusing in prescribing (medical) . The healthcare provider is registered in the NPI registry with number 1467663989 assigned on May 2007. The practitioner's primary taxonomy code is 103TP0016X with license number 02871 (MD). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1467663989
Provider Name: MARK WEIST PHD
Gender: Male
Entity Type: Individual
Location Address: 701 W PRATT ST BALTIMORE, MD 21201
Location Phone: (410) 328-5881
Location Fax: (717) 428-0518
Mailing Address: PO BOX 64515 BALTIMORE, MD 21264
Mailing Phone: (717) 428-0552
Mailing Fax: (717) 428-0518
Is Sole Proprietor?: No
Enumeration Date: 05-25-2007
Last Update Date: 07-08-2007
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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.: 02871
License State: MD
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has received from the state board of psychology a current certificate granting prescriptive authority, which has not been revoked or suspended.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 1467663989, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 6 → 12 → 3 6 → 12 → 3 3 → 6 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 2 + 7 + 1 + 2 + 6 + 6 + 9 + 1 + 6 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1467663989.