DR. JOHN LAWRENCE SCHALLER M.D., M.P.H.
NPI 1093830333
Preventive Medicine - Preventive Medicine/Occupational Environmental Medicine in Phoenix, AZ
NPI Status: Active since March 19, 2007
Contact Information
4645 E COTTON CENTER BLVD BLDG 1 # 200
PHOENIX, AZ
ZIP 85040
Phone: (602) 659-1123
- Individual
- Male
- Preventive Medicine
- Preventive Medicine/Occupational Environ...
About JOHN SCHALLER
This page provides the complete NPI Profile along with additional information for John Schaller, a provider established in Phoenix, Arizona with a medical specialization in Preventive Medicine, focusing in preventive medicine/occupational environmental medicine . The healthcare provider is registered in the NPI registry with number 1093830333 assigned on March 2007. The practitioner's primary taxonomy code is 2083P0500X with license number G66859 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1093830333
- Provider Name
- DR. JOHN LAWRENCE SCHALLER M.D., M.P.H.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4645 E COTTON CENTER BLVD BLDG 1 # 200 PHOENIX, AZ 85040
- Location Phone
- (602) 659-1123
- Mailing Address
- 4645 E COTTON CENTER BLVD BLDG 1 # 200 PHOENIX, AZ 85040
- Mailing Phone
- (602) 659-1123
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 03-19-2007
- Last Update Date
- 09-11-2025
- Code Navigator
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
Preventive Medicine Preventive Medicine/Occupational Environmental Medicine
- Taxonomy Code
- 2083P0500X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- G66859
- License State
- CA
- Taxonomy Description
- A preventive medicine physician who specializes in preventive medicine/occupational-environmental medicine, which is focused on protecting the population from occupational and environmental conditions.
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 | 17949 (AZ) |
| 2 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | G66859 (CA) |
| 3 | 2083P0500X | Allopathic & Osteopathic Physicians | Preventive Medicine | 17949 (AZ) |
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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 1093830333, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).
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 57 is 60. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1093830333, enumerated as an "individual" on March 19, 2007.
The provider is located at 4645 E COTTON CENTER BLVD BLDG 1 # 200 PHOENIX, AZ 85040 and the phone number is (602) 659-1123.
Preventive Medicine with taxonomy code 2083P0500X and a focus in Preventive Medicine/Occupational Environmental Medicine.
