SANDRA SUE RETZKY D.O.
NPI 1295913226
Obstetrics & Gynecology in Wilmington, DE
NPI Status: Active since January 31, 2008
Contact Information
146 MARCELLA RD
WILMINGTON, DE
ZIP 19803
Phone: (302) 540-3463
NPPES record last updated: January 31, 2008. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Female
- Obstetrics & Gynecology
About SANDRA RETZKY
This page provides the complete NPI Profile along with additional information for Sandra Retzky, a women's health care provider established in Wilmington, Delaware with a medical specialization in Obstetrics & Gynecology. The healthcare provider is registered in the NPI registry with number 1295913226 assigned on January 2008. The practitioner's primary taxonomy code is 207V00000X with license number DO 0358 (DE). The provider is registered as an individual and her NPI record was last updated 18 years ago.
- NPI
- 1295913226
- Provider Name
- SANDRA SUE RETZKY D.O.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 146 MARCELLA RD WILMINGTON, DE 19803
- Location Phone
- (302) 540-3463
- Mailing Address
- 146 MARCELLA RD WILMINGTON, DE 19803
- Mailing Phone
- (302) 540-3463
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 01-31-2008
- Last Update Date
- 01-31-2008
- Code Navigator
Women's health care providers like Sandra Retzky 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.
- DO 0358
- License State
- DE
- 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.
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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 1295913226, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
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 64 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1295913226, enumerated as an "individual" on January 31, 2008.
The provider is located at 146 MARCELLA RD WILMINGTON, DE 19803 and the phone number is (302) 540-3463.
Obstetrics & Gynecology with taxonomy code 207V00000X.
