DR. CARL GRUNFELD M.D.
NPI 1659487635
Internal Medicine - Endocrinology, Diabetes & Metabolism in San Francisco, CA
NPI Status: Active since August 22, 2006
Contact Information
4150 CLEMENT ST
METABOLISM SECTION 111F
SAN FRANCISCO, CA
ZIP 94121
Phone: (415) 750-2005
Fax: (415) 750-6927
- Individual
- Male
- Internal Medicine
- Endocrinology, Diabetes & Metabolism
About CARL GRUNFELD
This page provides the complete NPI Profile along with additional information for Carl Grunfeld, an internist established in San Francisco, California with a medical specialization in Internal Medicine, focusing in endocrinology, diabetes & metabolism . The healthcare provider is registered in the NPI registry with number 1659487635 assigned on August 2006. The practitioner's primary taxonomy code is 207RE0101X with license number G41853 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.
- NPI
- 1659487635
- Provider Name
- DR. CARL GRUNFELD M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4150 CLEMENT ST METABOLISM SECTION 111F SAN FRANCISCO, CA 94121
- Location Phone
- (415) 750-2005
- Location Fax
- (415) 750-6927
- Mailing Address
- VETERANS AFFAIRS MEDICAL CENTER 4150 CLEMENT STREET SAN FRANCISCO, CA 94121
- Mailing Phone
- (415) 750-2005
- Mailing Fax
- (415) 750-6927
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-22-2006
- Last Update Date
- 07-12-2007
- Code Navigator
An internist like Carl Grunfeld 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 Endocrinology, Diabetes & Metabolism
- Taxonomy Code
- 207RE0101X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- G41853
- License State
- CA
- Taxonomy Description
- An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
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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 1659487635, 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 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 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.
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 75 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
SAN FRANCISCO, CA 94121
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1659487635, enumerated as an "individual" on August 22, 2006.
The provider is located at 4150 CLEMENT ST METABOLISM SECTION 111F SAN FRANCISCO, CA 94121 and the phone number is (415) 750-2005.
Internal Medicine with taxonomy code 207RE0101X and a focus in Endocrinology, Diabetes & Metabolism.
