ROBERT BLOCK CRNA
NPI 1639219355
Nurse Anesthetist, Certified Registered in San Francisco, CA

NPI Status: Active since February 08, 2007

Contact Information

3555 CESAR CHAVEZ
SAN FRANCISCO, CA
ZIP 94110
Phone: (415) 641-6889

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

Individual
Male
Nurse Anesthetist, Certified Registered

About ROBERT BLOCK

This page provides the complete NPI Profile along with additional information for Robert Block, a provider established in San Francisco, California with a medical specialization in Nurse Anesthetist, Certified Registered. The healthcare provider is registered in the NPI registry with number 1639219355 assigned on February 2007. The practitioner's primary taxonomy code is 367500000X with license number 2491 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1639219355
Provider Name: ROBERT BLOCK CRNA
Gender: Male
Entity Type: Individual
Location Address: 3555 CESAR CHAVEZ SAN FRANCISCO, CA 94110
Location Phone: (415) 641-6889
Mailing Address: PO BOX 1622 ORANGE, CA 92856
Mailing Phone: (866) 740-7029
Is Sole Proprietor?: No
Enumeration Date: 02-08-2007
Last Update Date: 07-08-2007
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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: Nurse Anesthetist, Certified Registered
Taxonomy Code: 367500000X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: 2491
License State: CA
Taxonomy Description: (1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.

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 1639219355, 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

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 3 → 6 2 → 4 9 → 18 → 9 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 6 + 9 + 4 + 1 + 1 + 8 + 3 + 1 + 0 + 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 1639219355.