EDWARD N CHA M.D.
NPI 1134330988
Internal Medicine - Medical Oncology in San Francisco, CA
NPI Status: Active since May 24, 2007
Contact Information
505 PARNASSUS AVE
BOX 1270 - M1286
SAN FRANCISCO, CA
ZIP 94143
Phone: (415) 885-7276
Fax: (415) 476-0624
NPPES record last updated: August 28, 2008. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Internal Medicine
- Medical Oncology
About EDWARD CHA
This page provides the complete NPI Profile along with additional information for Edward Cha, an internist established in San Francisco, California with a medical specialization in Internal Medicine, focusing in medical oncology . The healthcare provider is registered in the NPI registry with number 1134330988 assigned on May 2007. The practitioner's primary taxonomy code is 207RX0202X with license number A103347 (CA). The provider is registered as an individual and his NPI record was last updated 18 years ago.
- NPI
- 1134330988
- Provider Name
- EDWARD N CHA M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 505 PARNASSUS AVE BOX 1270 - M1286 SAN FRANCISCO, CA 94143
- Location Phone
- (415) 885-7276
- Location Fax
- (415) 476-0624
- Mailing Address
- 505 PARNASSUS AVE BOX 1270 - M1286 SAN FRANCISCO, CA 94143
- Mailing Phone
- (415) 885-7276
- Mailing Fax
- (415) 476-0624
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-24-2007
- Last Update Date
- 08-28-2008
- Code Navigator
An internist like Edward Cha 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 Medical Oncology
- Taxonomy Code
- 207RX0202X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- A103347
- License State
- CA
- Taxonomy Description
- An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
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 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | 244407 (NY) |
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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 1134330988, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).
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 62 is 70. 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 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1134330988, enumerated as an "individual" on May 24, 2007.
The provider is located at 505 PARNASSUS AVE BOX 1270 - M1286 SAN FRANCISCO, CA 94143 and the phone number is (415) 885-7276.
Internal Medicine with taxonomy code 207RX0202X and a focus in Medical Oncology.
