MARK NACHMAN MD
NPI 1104803683
Internal Medicine in Santa Monica, CA

NPI Status: Active since December 27, 2005

Contact Information

1301 20TH ST
STE 290
SANTA MONICA, CA
ZIP 90404
Phone: (310) 315-0111
Fax: (310) 315-0110

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  • Individual
  • Male
  • Internal Medicine

About MARK NACHMAN

This page provides the complete NPI Profile along with additional information for Mark Nachman, an internist established in Santa Monica, California with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1104803683 assigned on December 2005. The practitioner's primary taxonomy code is 207R00000X with license number G27424 (CA). The provider is registered as an individual and his NPI record was last updated 5 years ago.

NPI
1104803683
Provider Name
MARK NACHMAN MD
Gender
Male
Entity Type
Individual
Location Address
1301 20TH ST STE 290 SANTA MONICA, CA 90404
Location Phone
(310) 315-0111
Location Fax
(310) 315-0110
Mailing Address
1301 20TH ST STE 290 SANTA MONICA, CA 90404
Mailing Phone
(310) 315-0111
Mailing Fax
(310) 315-0110
Is Sole Proprietor?
Yes
Enumeration Date
12-27-2005
Last Update Date
04-19-2021
Code Navigator

An internist like Mark Nachman 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

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
G27424
License State
CA
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

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)
1207RN0300XAllopathic & Osteopathic Physicians

Internal Medicine
Nephrology

G27424 (CA)

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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 1104803683, 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.

Pos 1
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
0
Doubled → 0
Pos 4
4
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
0
Unchanged
Pos 7
3
Doubled → 6
Pos 8
6
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
3
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 0 → 0 8 → 16 → 7 3 → 6 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 0 + 4 + 1 + 6 + 0 + 6 + 6 + 1 + 6 + 24 = 57

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.

60 - 57 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1104803683.

Other Providers at the Same Location


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

Ophthalmology
1301 20TH ST, SUITE 250
SANTA MONICA, CA 90404
Psychiatry & Neurology (Psychiatry)
1301 20TH ST, STE 212
SANTA MONICA, CA 90404
Internal Medicine (Gastroenterology)
1301 20TH ST, SUITE 280
SANTA MONICA, CA 90404
Obstetrics & Gynecology
1301 20TH ST, STE 510
SANTA MONICA, CA 90404
Clinic/Center (Ambulatory Surgical)
1301 20TH ST, SUITE 300
SANTA MONICA, CA 90404
Specialist
1301 20TH ST, SUITE 300
SANTA MONICA, CA 90404
Dermatology
1301 20TH ST, SUITE 570
SANTA MONICA, CA 90404
Specialist
1301 20TH ST, SUITE 590
SANTA MONICA, CA 90404
Surgery
1301 20TH ST, SUITE 440
SANTA MONICA, CA 90404
Legal Medicine
1301 20TH ST, #550
SANTA MONICA, CA 90404
Specialist
1301 20TH ST
SANTA MONICA, CA 90404
Physical Therapist (Orthopedic)
1301 20TH ST, SUITE 150
SANTA MONICA, CA 90404
Internal Medicine (Pulmonary Disease)
1301 20TH ST, SUITE 360
SANTA MONICA, CA 90404
Internal Medicine (Critical Care Medicine)
1301 20TH ST, SUITE 360
SANTA MONICA, CA 90404
Internal Medicine (Rheumatology)
1301 20TH ST, SUITE 390
SANTA MONICA, CA 90404
Allergy & Immunology
1301 20TH ST, SUITE 220
SANTA MONICA, CA 90404
Allergy & Immunology
1301 20TH ST, SUITE 220
SANTA MONICA, CA 90404
Plastic Surgery
1301 20TH ST, SUITE 530
SANTA MONICA, CA 90404
Anesthesiology
1301 20TH ST
SANTA MONICA, CA 90404
Specialist
1301 20TH ST, #460
SANTA MONICA, CA 90404

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104803683, enumerated as an "individual" on December 27, 2005.

The provider is located at 1301 20TH ST STE 290 SANTA MONICA, CA 90404 and the phone number is (310) 315-0111.

Internal Medicine with taxonomy code 207R00000X.