DENISE MAIN M.D.
NPI 1356363154
Obstetrics & Gynecology - Maternal & Fetal Medicine in San Francisco, CA

NPI Status: Active since July 24, 2006

Contact Information

1100 VAN NESS AVE FL 4
SAN FRANCISCO, CA
ZIP 94109
Phone: (415) 600-6400
Fax: (415) 369-1384

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

Individual
Female
Obstetrics & Gynecology
Maternal & Fetal Medicine

About DENISE MAIN

This page provides the complete NPI Profile along with additional information for Denise Main, a women's health care provider established in San Francisco, California with a medical specialization in Obstetrics & Gynecology, focusing in maternal & fetal medicine . The healthcare provider is registered in the NPI registry with number 1356363154 assigned on July 2006. The practitioner's primary taxonomy code is 207VM0101X with license number G60240 (CA). The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI: 1356363154
Provider Name: DENISE MAIN M.D.
Gender: Female
Entity Type: Individual
Location Address: 1100 VAN NESS AVE FL 4 SAN FRANCISCO, CA 94109
Location Phone: (415) 600-6400
Location Fax: (415) 369-1384
Mailing Address: 325 DISTEL CIR LOS ALTOS, CA 94022
Mailing Phone: (415) 600-6400
Mailing Fax: (415) 369-1384
Is Sole Proprietor?: No
Enumeration Date: 07-24-2006
Last Update Date: 07-15-2021
Code Navigator

Women's health care providers like Denise Main treat and diagnose diseases and conditions that affect a woman's physical and emotional health. Women's health professionals come from a variety of different specialties, including obstetrician/gynecologists, general surgeons, perinatologists, physician assistants, nurse practitioners or nurse midwives. A women's health provider might help you with family planning, breast care, pregnancy and child birth, osteoporosis, menopause, heart disease, etc.

Location Map

Secondary Locations

3700 California St 1st Floor
San Francisco, CA 94118
(415) 600-6400
5730 Telegraph Ave Ste 117
Oakland, CA 94609
(415) 600-6400
165 Rowland Way Ste 201
Novato, CA 94945
(415) 600-6400
990 Sonoma Ave Ste 9
Santa Rosa, CA 95404
(415) 600-6400

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: Obstetrics & Gynecology Maternal & Fetal Medicine
Taxonomy Code: 207VM0101X
Type: Allopathic & Osteopathic Physicians
License No.: G60240
License State: CA
Taxonomy Description: An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

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	207SG0201X	Allopathic & Osteopathic Physicians	Medical Genetics Clinical Genetics (M.D.)	G60240 (CA)
2	208000000X	Allopathic & Osteopathic Physicians	Pediatrics	387929 (CA)

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 1356363154, 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 6

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 5 → 10 → 1 3 → 6 3 → 6 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 0 + 6 + 6 + 6 + 6 + 1 + 1 + 0 + 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 1356363154.