SANG HOON AHN MEDICAL GROUP, INC.
NPI 1720931736
Internal Medicine in Fullerton, CA
NPI Status: Active since February 18, 2026
Contact Information
1950 SUNNY CREST DR STE 2800
FULLERTON, CA
ZIP 92835
Phone: (657) 888-9919
Fax: (657) 888-9941
- Organization
- Internal Medicine
About SANG HOON AHN MEDICAL GROUP, INC.
This page provides the complete NPI Profile along with additional information for Sang Hoon Ahn Medical Group, Inc., an internist established in Fullerton, California operating as a Internal Medicine. The healthcare provider is registered in the NPI registry with number 1720931736 assigned on February 2026. The practitioner's primary taxonomy code is 207R00000X. The provider is registered as an organization and their NPI record was last updated March 2026. Sang Hoon Ahn Medical Group, Inc. operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Dr. Sang Hoon Ahn Md, Mph (Ceo)
- NPI
- 1720931736
- Provider Name
- SANG HOON AHN MEDICAL GROUP, INC.
- Entity Type
- Organization
- Location Address
- 1950 SUNNY CREST DR STE 2800 FULLERTON, CA 92835
- Location Phone
- (657) 888-9919
- Location Fax
- (657) 888-9941
- Mailing Address
- 1520 HOLLYDALE DR FULLERTON, CA 92831
- Mailing Phone
- (213) 245-0788
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 02-18-2026
- Last Update Date
- 03-12-2026
- Code Navigator
An internist like Sang Hoon Ahn Medical Group, Inc. 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
- Taxonomy Code
- 207R00000X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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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 1720931736, 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 64 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1720931736, enumerated as an "organization" on February 18, 2026.
The provider is located at 1950 SUNNY CREST DR STE 2800 FULLERTON, CA 92835 and the phone number is (657) 888-9919.
Internal Medicine with taxonomy code 207R00000X.
