MICHAEL SIDNEY HOROWITZ MD
NPI 1275647174
Internal Medicine - Cardiovascular Disease in Tiburon, CA

NPI Status: Active since August 18, 2006

Contact Information

253 TRINIDAD DR
TIBURON, CA
ZIP 94920
Phone: (201) 563-2205
Fax: (973) 364-0101

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  • Individual
  • Male
  • Internal Medicine
  • Cardiovascular Disease

About MICHAEL HOROWITZ

This page provides the complete NPI Profile along with additional information for Michael Horowitz, an internist established in Tiburon, California with a medical specialization in Internal Medicine, focusing in cardiovascular disease . The healthcare provider is registered in the NPI registry with number 1275647174 assigned on August 2006. The practitioner's primary taxonomy code is 207RC0000X with license number G22771 (CA). The provider is registered as an individual and his NPI record was last updated 2 years ago.

NPI
1275647174
Provider Name
MICHAEL SIDNEY HOROWITZ MD
Gender
Male
Entity Type
Individual
Location Address
253 TRINIDAD DR TIBURON, CA 94920
Location Phone
(201) 563-2205
Location Fax
(973) 364-0101
Mailing Address
253 TRINIDAD DR TIBURON, CA 94920
Mailing Phone
(201) 563-2205
Mailing Fax
(973) 364-0101
Is Sole Proprietor?
Yes
Enumeration Date
08-18-2006
Last Update Date
10-14-2024
Code Navigator

An internist like Michael Horowitz 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 Cardiovascular Disease

Taxonomy Code
207RC0000X
Type
Allopathic & Osteopathic Physicians
License No.
G22771
License State
CA
Taxonomy Description
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

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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 1275647174, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).

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
2
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
5
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
4
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
1
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
4
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 7 → 14 → 5 6 → 12 → 3 7 → 14 → 5 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 4 + 5 + 1 + 2 + 4 + 1 + 4 + 1 + 1 + 4 + 24 = 56

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

The next multiple of ten after 56 is 60. The difference is the calculated check digit.

60 - 56 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1275647174.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1275647174, enumerated as an "individual" on August 18, 2006.

The provider is located at 253 TRINIDAD DR TIBURON, CA 94920 and the phone number is (201) 563-2205.

Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.