GREENWICH OPHTHALMOLOGY ASSOC
NPI 1700879004
Ophthalmology in Greenwich, CT

NPI Status: Active since August 23, 2005

Contact Information

4 DEARFIELD DR
GREENWICH, CT
ZIP 06831
Phone: (203) 869-3082
Fax: (203) 869-6453

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  • Organization
  • Ophthalmology
  • CLIA Number: 07D2015628
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 10-28-2026

About GREENWICH OPHTHALMOLOGY ASSOC

This page provides the complete NPI Profile along with additional information for Greenwich Ophthalmology Assoc, a provider established in Greenwich, Connecticut operating as a Ophthalmology. The healthcare provider is registered in the NPI registry with number 1700879004 assigned on August 2005. The practitioner's primary taxonomy code is 207W00000X. The provider is registered as an organization and their NPI record was last updated 8 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 Christine Birdsall (Practice Administrator)

NPI
1700879004
Provider Name
GREENWICH OPHTHALMOLOGY ASSOC
Entity Type
Organization
Location Address
4 DEARFIELD DR GREENWICH, CT 06831
Location Phone
(203) 869-3082
Location Fax
(203) 869-6453
Mailing Address
2046 W MAIN ST STE 2 STAMFORD, CT 06902
Mailing Phone
(203) 869-3082
Mailing Fax
(203) 869-6453
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
08-23-2005
Last Update Date
03-29-2018
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Ophthalmologists like Greenwich Ophthalmology Assoc specialize in diagnosing and treating eye conditions. They may perform surgeries to correct vision issues or prevent vision loss due to diseases like glaucoma. Additionally, they can provide eyeglasses, prescribe contact lenses, and offer other vision-related services.

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

Ophthalmology

Taxonomy Code
207W00000X
Type
Allopathic & Osteopathic Physicians
Taxonomy Description
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

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.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

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

CHRISTINE BIRDSALL

Authorized Official Title
PRACTICE ADMINISTRATOR
Authorized Official Phone
(203) 869-3082

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
CH8430OTHER (01)RR MEDICARE

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
07D2015628
Facility Type
Physician Office
Certificate Effective Date
October 29, 2024
Certificate Expiration Date
October 28, 2026
Laboratory Director
SURESH MANDAVA MD
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Greenwich Ophthalmology Assoc to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

Reviews for GREENWICH OPHTHALMOLOGY ASSOC

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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 1700879004, 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
7
Unchanged
Pos 3
0
Doubled → 0
Pos 4
0
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
7
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
0
Unchanged
Pos 9
0
Doubled → 0
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 0 → 0 8 → 16 → 7 9 → 18 → 9 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 0 + 0 + 1 + 6 + 7 + 1 + 8 + 0 + 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 1700879004.

Other Providers at the Same Location


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

Ophthalmology
4 DEARFIELD DR
GREENWICH, CT 06831
Ophthalmology
4 DEARFIELD DR
GREENWICH, CT 06831
Ophthalmology
4 DEARFIELD DR
GREENWICH, CT 06831
Ophthalmology
4 DEARFIELD DR
GREENWICH, CT 06831
Specialist
4 DEARFIELD DR, SUITE 203
GREENWICH, CT 06831
Otolaryngology
4 DEARFIELD DR, STE 104
GREENWICH, CT 06831
Dentist (General Practice)
4 DEARFIELD DR
GREENWICH, CT 06831
Psychologist (Clinical)
4 DEARFIELD DR, SUITE 102
GREENWICH, CT 06831
Psychiatry & Neurology (Psychiatry)
4 DEARFIELD DR
GREENWICH, CT 06831
Obstetrics & Gynecology (Gynecology)
4 DEARFIELD DR
GREENWICH, CT 06831
Chiropractor (Orthopedic)
4 DEARFIELD DR, SUITE 105
GREENWICH, CT 06831
Dentist (General Practice)
4 DEARFIELD DR, SUITE 202
GREENWICH, CT 06831
Dentist (General Practice)
4 DEARFIELD DR
GREENWICH, CT 06831
Specialist
4 DEARFIELD DR, SUITE 106
GREENWICH, CT 06831
Dentist
4 DEARFIELD DR, SUITE 202
GREENWICH, CT 06831
Dentist (Orthodontics and Dentofacial Orthopedics)
4 DEARFIELD DR
GREENWICH, CT 06831
Dentist (Periodontics)
4 DEARFIELD DR, SUITE 201
GREENWICH, CT 06831
Dentist (General Practice)
4 DEARFIELD DR
GREENWICH, CT 06831
Podiatrist
4 DEARFIELD DR, SUITE 106
GREENWICH, CT 06831
Audiologist
4 DEARFIELD DR, SUITE 104
GREENWICH, CT 06831

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1700879004, enumerated as an "organization" on August 23, 2005.

The provider is located at 4 DEARFIELD DR GREENWICH, CT 06831 and the phone number is (203) 869-3082.

Ophthalmology with taxonomy code 207W00000X.

The provider might be accepting Accepts: Railroad Medicare, Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.