DR. JOHN LESLIE CHSAE MD
NPI 1932235421
Orthopaedic Surgery in San Francisco, CA

NPI Status: Active since February 26, 2007

Contact Information

1600 DIVISADERO ST
UCSF MEDICAL CENTER
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 885-7268
Fax: (415) 885-7611

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  • Individual
  • Male
  • Orthopaedic Surgery

About JOHN CHSAE

This page provides the complete NPI Profile along with additional information for John Chsae, a provider established in San Francisco, California with a medical specialization in Orthopaedic Surgery. The healthcare provider is registered in the NPI registry with number 1932235421 assigned on February 2007. The practitioner's primary taxonomy code is 207X00000X with license number A22985 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1932235421
Provider Name
DR. JOHN LESLIE CHSAE MD
Gender
Male
Entity Type
Individual
Location Address
1600 DIVISADERO ST UCSF MEDICAL CENTER SAN FRANCISCO, CA 94115
Location Phone
(415) 885-7268
Location Fax
(415) 885-7611
Mailing Address
10423 OLD PLACERVILLE RD # 100 SACRAMENTO, CA 95827
Mailing Phone
(916) 920-2272
Mailing Fax
(415) 885-7611
Is Sole Proprietor?
Yes
Enumeration Date
02-26-2007
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

Orthopaedic Surgery

Taxonomy Code
207X00000X
Type
Allopathic & Osteopathic Physicians
License No.
A22985
License State
CA
Taxonomy Description
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

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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 1932235421, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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
9
Unchanged
Pos 3
3
Doubled → 6
Pos 4
2
Unchanged
Pos 5
2
Doubled → 4
Pos 6
3
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
4
Unchanged
Pos 9
2
Doubled → 4
Check
1
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 5 → 10 → 1 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 6 + 2 + 4 + 3 + 1 + 0 + 4 + 4 + 24 = 59

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1932235421.

Other Providers at the Same Location


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

Internal Medicine (Medical Oncology)
1600 DIVISADERO ST, 2ND FLOOR, BOX 1710
SAN FRANCISCO, CA 94115
Internal Medicine (Medical Oncology)
1600 DIVISADERO ST, 2ND FLOOR, BOX 1710
SAN FRANCISCO, CA 94115
Surgery
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Diagnostic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Orthopaedic Surgery
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Diagnostic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Nurse Practitioner
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Diagnostic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Radiation Oncology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Nurse Practitioner
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Radiation Oncology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Radiation Oncology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Radiology (Therapeutic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Nurse Practitioner
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Registered Nurse
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115
Nurse Practitioner
1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1932235421, enumerated as an "individual" on February 26, 2007.

The provider is located at 1600 DIVISADERO ST UCSF MEDICAL CENTER SAN FRANCISCO, CA 94115 and the phone number is (415) 885-7268.

Orthopaedic Surgery with taxonomy code 207X00000X.