DR. GIFFORD S. LEOUNG M.D.
NPI 1295782225
Internal Medicine - Infectious Disease in San Francisco, CA

NPI Status: Active since May 27, 2006

Contact Information

909 HYDE ST
SUITE #210
SAN FRANCISCO, CA
ZIP 94109
Phone: (415) 474-7900
Fax: (415) 474-7930

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  • Individual
  • Male
  • Internal Medicine
  • Infectious Disease

About GIFFORD LEOUNG

This page provides the complete NPI Profile along with additional information for Gifford Leoung, an internist established in San Francisco, California with a medical specialization in Internal Medicine, focusing in infectious disease . The healthcare provider is registered in the NPI registry with number 1295782225 assigned on May 2006. The practitioner's primary taxonomy code is 207RI0200X with license number G47347 (CA). The provider is registered as an individual and his NPI record was last updated 18 years ago.

NPI
1295782225
Provider Name
DR. GIFFORD S. LEOUNG M.D.
Gender
Male
Entity Type
Individual
Location Address
909 HYDE ST SUITE #210 SAN FRANCISCO, CA 94109
Location Phone
(415) 474-7900
Location Fax
(415) 474-7930
Mailing Address
909 HYDE ST SUITE #210 SAN FRANCISCO, CA 94109
Mailing Phone
(415) 474-7900
Mailing Fax
(415) 474-7930
Is Sole Proprietor?
Yes
Enumeration Date
05-27-2006
Last Update Date
02-08-2008
Code Navigator

An internist like Gifford Leoung is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

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

Internal Medicine Infectious Disease

Taxonomy Code
207RI0200X
Type
Allopathic & Osteopathic Physicians
License No.
G47347
License State
CA
Taxonomy Description
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
A50666MEDICARE UPIN (02)CA 

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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 1295782225, 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
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
5
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
8
Unchanged
Pos 7
2
Doubled → 4
Pos 8
2
Unchanged
Pos 9
2
Doubled → 4
Check
5
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 7 → 14 → 5 2 → 4 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 8 + 5 + 1 + 4 + 8 + 4 + 2 + 4 + 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 1295782225.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine
909 HYDE ST, SUITE 210
SAN FRANCISCO, CA 94109
Specialist
909 HYDE ST, SUITE 222
SAN FRANCISCO, CA 94109
Plastic Surgery
909 HYDE ST, SUITE 602
SAN FRANCISCO, CA 94109
Allergy & Immunology
909 HYDE ST, STE 633
SAN FRANCISCO, CA 94109
Allergy & Immunology
909 HYDE ST, STE 633
SAN FRANCISCO, CA 94109
Internal Medicine (Gastroenterology)
909 HYDE ST, SUITE 210
SAN FRANCISCO, CA 94109
Podiatrist
909 HYDE ST, SUITE 602
SAN FRANCISCO, CA 94109
Dermatology
909 HYDE ST, SUITE 423
SAN FRANCISCO, CA 94109
Internal Medicine
909 HYDE ST, 210
SAN FRANCISCO, CA 94109
Psychologist (Clinical)
909 HYDE ST, SUITE 425
SAN FRANCISCO, CA 94109
Family Medicine
909 HYDE ST, SUITE 410
SAN FRANCISCO, CA 94109
Internal Medicine
909 HYDE ST, STE 317
SAN FRANCISCO, CA 94109
Surgery
909 HYDE ST, SUITE 325
SAN FRANCISCO, CA 94109
Psychiatry & Neurology (Psychiatry)
909 HYDE ST, SUITE 428
SAN FRANCISCO, CA 94109
Clinical Neuropsychologist
909 HYDE ST, SUITE 620
SAN FRANCISCO, CA 94109
Psychiatry & Neurology (Psychiatry)
909 HYDE ST, SUITE 620
SAN FRANCISCO, CA 94109
Psychiatry & Neurology (Psychiatry)
909 HYDE ST, SUITE # 205
SAN FRANCISCO, CA 94109
Specialist
909 HYDE ST, SUITE 515
SAN FRANCISCO, CA 94109
Surgery (Plastic and Reconstructive Surgery)
909 HYDE ST, SUITE # 615
SAN FRANCISCO, CA 94109
Dentist (General Practice)
909 HYDE ST, SUITE 406
SAN FRANCISCO, CA 94109

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1295782225, enumerated as an "individual" on May 27, 2006.

The provider is located at 909 HYDE ST SUITE #210 SAN FRANCISCO, CA 94109 and the phone number is (415) 474-7900.

Internal Medicine with taxonomy code 207RI0200X and a focus in Infectious Disease.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.