MALCOM LATOUR MCDONALD
NPI 1770036816
Counselor - Professional in San Francisco, CA

NPI Status: Active since July 25, 2016

Contact Information

1563 MISSION ST
SAN FRANCISCO, CA
ZIP 94103
Phone: (415) 762-3700
Fax: (415) 554-0159

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

Individual
Male
Counselor
Professional

About MALCOM MCDONALD

This page provides the complete NPI Profile along with additional information for Malcom Mcdonald, a provider established in San Francisco, California with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1770036816 assigned on July 2016. The practitioner's primary taxonomy code is 101YP2500X with license number 21004 (CA). The provider is registered as an individual and his NPI record was last updated February 2026.

NPI: 1770036816
Provider Name: MALCOM LATOUR MCDONALD
Gender: Male
Entity Type: Individual
Location Address: 1563 MISSION ST SAN FRANCISCO, CA 94103
Location Phone: (415) 762-3700
Location Fax: (415) 554-0159
Mailing Address: 1005 ATLANTIC AVE ALAMEDA, CA 94501
Mailing Phone: (415) 474-7310
Is Sole Proprietor?: No
Enumeration Date: 07-25-2016
Last Update Date: 02-03-2026
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Location Map

Secondary Locations

1005 Atlantic Ave
Alameda, CA 94501
(415) 474-7310

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: Counselor Professional
Taxonomy Code: 101YP2500X
Type: Behavioral Health & Social Service Providers
License No.: 21004
License State: CA

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	106H00000X	Behavioral Health & Social Service Providers	Marriage & Family Therapist	117501 (CA)
2	390200000X	Student, Health Care	Student in an Organized Health Care Education/Training Program	117501 (CA)

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 1770036816, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 2

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 7 → 14 → 5 0 → 0 6 → 12 → 3 1 → 2