BRANDY LIU D.O.
NPI 1093150559
Preventive Medicine - Obesity Medicine in San Francisco, CA

Q: What is the provider's specialty?

The provider's specialty is Preventive Medicine with taxonomy code 2083B0002X and a focus in Obesity Medicine.

NPI Status: Active since May 09, 2013

Contact Information

425 CALIFORNIA ST STE 1400
SAN FRANCISCO, CA
ZIP 94104
Phone: (855) 527-1850
Fax: (650) 360-0447

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NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: July 12, 2026.

Record update history: May 20, 2026, Feb 28, 2023, Dec 8, 2022 and 1 more (4 updates tracked since 2018).

Table of Contents

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

Individual
Female
Preventive Medicine
Obesity Medicine

About BRANDY LIU

This page provides the complete NPI Profile along with additional information for Brandy Liu, a provider established in San Francisco, California with a medical specialization in Preventive Medicine, focusing in obesity medicine . The healthcare provider is registered in the NPI registry with number 1093150559 assigned on May 2013. The practitioner's primary taxonomy code is 2083B0002X with license number 20A14179 (CA). The provider is registered as an individual and her NPI record was last updated May 2026.

NPI: 1093150559
Provider Name: BRANDY LIU D.O.
Gender: Female
Entity Type: Individual
Location Address: 425 CALIFORNIA ST STE 1400 SAN FRANCISCO, CA 94104
Location Phone: (855) 527-1850
Location Fax: (650) 360-0447
Mailing Address: 5120 HAMNER AVE STE 140 EASTVALE, CA 91752
Mailing Phone: (951) 298-9987
Is Sole Proprietor?: No
Enumeration Date: 05-09-2013
Last Update Date: 05-20-2026
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Location Map

Secondary Locations

1050 N Garey Ave
Pomona, CA 91767
(909) 623-6391

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: Preventive Medicine Obesity Medicine
Taxonomy Code: 2083B0002X
Type: Allopathic & Osteopathic Physicians
License No.: 20A14179
License State: CA
Taxonomy Description: A physician who specializes in the treatment of obesity demonstrates competency in and a thorough understanding of the treatment of obesity and the genetic, biologic, environmental, social, and behavioral factors that contribute to obesity. The obesity medicine physician employs therapeutic interventions including diet, physical activity, behavioral change, and pharmacotherapy. The obesity medicine physician utilizes a comprehensive approach, and may include additional resources such as dietitians, exercise physiologists, mental health professionals and bariatric surgeons as indicated to achieve optimal results. Additionally, the obesity medicine physician maintains competency in providing pre- peri- and post-surgical care of bariatric surgery patients, promotes the prevention of obesity, and advocates for those who suffer from obesity.

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	2083A0300X	Allopathic & Osteopathic Physicians	Preventive Medicine Addiction Medicine	20A14179 (CA)
2	2083P0901X	Allopathic & Osteopathic Physicians	Preventive Medicine Public Health & General Preventive Medicine	20A14179 (CA)

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 1093150559, 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 1 → 2 0 → 0 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 8 + 3 + 2 + 5 + 0 + 5 + 1 + 0 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1093150559.