CAROL L. MERRYFIELD, MD, INC.
NPI 1891087763
Obstetrics & Gynecology in Redwood City, CA

NPI Status: Active since May 10, 2011

Contact Information

2900 WHIPPLE AVE
SUITE 140
REDWOOD CITY, CA
ZIP 94062
Phone: (650) 298-0990
Fax: (650) 298-8060

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  • Organization
  • Obstetrics & Gynecology

About CAROL L. MERRYFIELD, MD, INC.

This page provides the complete NPI Profile along with additional information for Carol L. Merryfield, Md, Inc., a women's health care provider established in Redwood City, California operating as a Obstetrics & Gynecology. The healthcare provider is registered in the NPI registry with number 1891087763 assigned on May 2011. The practitioner's primary taxonomy code is 207V00000X with license number G40782 (CA). The provider is registered as an organization and their NPI record was last updated 15 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Carol L Merryfield Md (President/md)

NPI
1891087763
Provider Name
CAROL L. MERRYFIELD, MD, INC.
Entity Type
Organization
Location Address
2900 WHIPPLE AVE SUITE 140 REDWOOD CITY, CA 94062
Location Phone
(650) 298-0990
Location Fax
(650) 298-8060
Mailing Address
2900 WHIPPLE AVE SUITE 140 REDWOOD CITY, CA 94062
Mailing Phone
(650) 298-0990
Mailing Fax
(650) 298-8060
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
05-10-2011
Last Update Date
05-10-2011
Code Navigator

Women's health care providers like Carol L. Merryfield, Md, Inc. 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

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

Taxonomy Code
207V00000X
Type
Allopathic & Osteopathic Physicians
License No.
G40782
License State
CA
Taxonomy Description
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

CAROL L MERRYFIELD MD

Authorized Official Title
PRESIDENT/MD
Authorized Official Phone
(650) 298-0990

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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 1891087763, 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 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
8
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
1
Unchanged
Pos 5
0
Doubled → 0
Pos 6
8
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
7
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
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 9 → 18 → 9 0 → 0 7 → 14 → 5 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 8 + 1 + 0 + 8 + 1 + 4 + 7 + 1 + 2 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1891087763.

Other Providers at the Same Location


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

Internal Medicine (Critical Care Medicine)
2900 WHIPPLE AVE, STE 115
REDWOOD CITY, CA 94062
Thoracic Surgery (Cardiothoracic Vascular Surgery)
2900 WHIPPLE AVE, SUITE 225
REDWOOD CITY, CA 94062
Specialist
2900 WHIPPLE AVE, #135
REDWOOD CITY, CA 94062
Specialist
2900 WHIPPLE AVE, #135
REDWOOD CITY, CA 94062
Internal Medicine (Cardiovascular Disease)
2900 WHIPPLE AVE, SUITE 230
REDWOOD CITY, CA 94062
Physician Assistant
2900 WHIPPLE AVE, SUITE 230
REDWOOD CITY, CA 94062
Urology
2900 WHIPPLE AVE, SUITE 132
REDWOOD CITY, CA 94062
Obstetrics & Gynecology
2900 WHIPPLE AVE, #135
REDWOOD CITY, CA 94062
Internal Medicine
2900 WHIPPLE AVE, SUITE 130
REDWOOD CITY, CA 94062
Physician Assistant (Medical)
2900 WHIPPLE AVE, SUITE 210
REDWOOD CITY, CA 94062
Internal Medicine (Gastroenterology)
2900 WHIPPLE AVE, SUITE 245
REDWOOD CITY, CA 94062
Obstetrics & Gynecology
2900 WHIPPLE AVE, #135
REDWOOD CITY, CA 94062
Nurse Practitioner (Obstetrics & Gynecology)
2900 WHIPPLE AVE, #135
REDWOOD CITY, CA 94062
Nurse Practitioner
2900 WHIPPLE AVE, SUITE 245
REDWOOD CITY, CA 94062
Specialist
2900 WHIPPLE AVE, SUITE #225
REDWOOD CITY, CA 94062
Physician Assistant (Surgical)
2900 WHIPPLE AVE, SUITE140
REDWOOD CITY, CA 94062
Internal Medicine
2900 WHIPPLE AVE, SUITE 130
REDWOOD CITY, CA 94062
Physical Medicine & Rehabilitation (Pain Medicine)
2900 WHIPPLE AVE, SUITE 210
REDWOOD CITY, CA 94062
Internal Medicine
2900 WHIPPLE AVE, SUITE # 115
REDWOOD CITY, CA 94062
Thoracic Surgery (Cardiothoracic Vascular Surgery)
2900 WHIPPLE AVE, SUITE 140
REDWOOD CITY, CA 94062

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1891087763, enumerated as an "organization" on May 10, 2011.

The provider is located at 2900 WHIPPLE AVE SUITE 140 REDWOOD CITY, CA 94062 and the phone number is (650) 298-0990.

Obstetrics & Gynecology with taxonomy code 207V00000X.