JOHNS HOPKINS UNIVERSITY
NPI 1982559977
Ophthalmology in Bel Air, MD

NPI Status: Active since March 04, 2026

Contact Information

620 BOULTON ST
BEL AIR, MD
ZIP 21014
Phone: (410) 893-0480

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  • Organization
  • Ophthalmology

About JOHNS HOPKINS UNIVERSITY

This page provides the complete NPI Profile along with additional information for Johns Hopkins University, a provider established in Bel Air, Maryland operating as a Ophthalmology. The healthcare provider is registered in the NPI registry with number 1982559977 assigned on March 2026. The practitioner's primary taxonomy code is 207W00000X. The provider is registered as an organization and their NPI record was last updated March 2026. Johns Hopkins University operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Nicholas Giarratano (Director, Provider Enrollment)

NPI
1982559977
Provider Name
JOHNS HOPKINS UNIVERSITY
Entity Type
Organization
Location Address
620 BOULTON ST BEL AIR, MD 21014
Location Phone
(410) 893-0480
Mailing Address
6201 GREENLEIGH AVE MIDDLE RIVER, MD 21220
Mailing Phone
(410) 933-6423
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
03-04-2026
Last Update Date
03-04-2026
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Ophthalmologists like Johns Hopkins University 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.

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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 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas 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

NICHOLAS GIARRATANO

Authorized Official Title
DIRECTOR, PROVIDER ENROLLMENT
Authorized Official Phone
(410) 933-0000

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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 1982559977, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).

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
9
Unchanged
Pos 3
8
Doubled → 16 → 1 + 6
Pos 4
2
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
5
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
9
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
7
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 8 → 16 → 7 5 → 10 → 1 9 → 18 → 9 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 1 + 6 + 2 + 1 + 0 + 5 + 1 + 8 + 9 + 1 + 4 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1982559977.

Other Providers at the Same Location


The following 13 providers are registered at the same or a nearby location.

Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Eyewear Supplier
620 BOULTON ST
BEL AIR, MD 21014
Clinic/Center (Ambulatory Surgical)
620 BOULTON ST, 2ND FLOOR
BEL AIR, MD 21014
Optometrist
620 BOULTON ST
BEL AIR, MD 21014
Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Optometrist
620 BOULTON ST
BEL AIR, MD 21014
Optometrist
620 BOULTON ST
BEL AIR, MD 21014
Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Ophthalmology
620 BOULTON ST
BEL AIR, MD 21014
Optometrist
620 BOULTON ST
BEL AIR, MD 21014
Anesthesiology (Critical Care Medicine)
620 BOULTON ST
BEL AIR, MD 21014

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1982559977, enumerated as an "organization" on March 04, 2026.

The provider is located at 620 BOULTON ST BEL AIR, MD 21014 and the phone number is (410) 893-0480.

Ophthalmology with taxonomy code 207W00000X.