DESMOND JAMES WATT PA-C
NPI 1134468515
Physician Assistant - Medical in San Francisco, CA

NPI Status: Active since February 05, 2013

Contact Information

2 EMBARCADERO CTR LBBY
SAN FRANCISCO, CA
ZIP 94111
Phone: (415) 578-3100
Fax: (415) 252-7176

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

Individual
Male
Physician Assistant
Medical

About DESMOND WATT

This page provides the complete NPI Profile along with additional information for Desmond Watt, a primary care provider established in San Francisco, California with a medical specialization in Physician Assistant, focusing in medical . The healthcare provider is registered in the NPI registry with number 1134468515 assigned on February 2013. The practitioner's primary taxonomy code is 363AM0700X with license number 8507 (AZ). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1134468515
Provider Name: DESMOND JAMES WATT PA-C
Gender: Male
Entity Type: Individual
Location Address: 2 EMBARCADERO CTR LBBY SAN FRANCISCO, CA 94111
Location Phone: (415) 578-3100
Location Fax: (415) 252-7176
Mailing Address: 1 EMBARCADERO CTR STE 1900 SAN FRANCISCO, CA 94111
Mailing Phone: (415) 658-6791
Is Sole Proprietor?: No
Enumeration Date: 02-05-2013
Last Update Date: 03-14-2025
Code Navigator

A primary care provider (PCP) like Desmond Watt sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .

Location Map

Secondary Locations

200 W Jackson Blvd Fl 10
Chicago, IL 60606
(917) 261-4414
8600 W Bryn Mawr Ave # 130-8600
Chicago, IL 60631
(917) 261-4414
131 S Dearborn St Ste 1025
Chicago, IL 60603
(917) 261-4414

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: Physician Assistant Medical
Taxonomy Code: 363AM0700X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: 8507
License State: AZ

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	363A00000X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant	PA.0007618 (CO)
2	363A00000X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant	PA61373940 (WA)
3	363A00000X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant	PA100475 (MA)
4	363A00000X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant	0010-14690 (NC)
5	363A00000X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant	11809 (GA)
6	363AM0700X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant Medical	51522 (CA)
7	363AM0700X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant Medical	018349 (NY)
8	363AM0700X	Physician Assistants & Advanced Practice Nursing Providers	Physician Assistant Medical	085004547 (IL)

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 1134468515, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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 → 6

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

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 3 → 6 4 → 8 8 → 16 → 7 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 6 + 4 + 8 + 6 + 1 + 6 + 5 + 2 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1134468515.