JOHNS HOPKINS UNIVERSITY
NPI 1053271767
Clinical Medical Laboratory in Baltimore, MD

NPI Status: Active since November 14, 2025

Contact Information

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287
Phone: (410) 955-9540

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  • Organization
  • Clinical Medical Laboratory

About JOHNS HOPKINS UNIVERSITY

This page provides the complete NPI Profile along with additional information for Johns Hopkins University, a provider established in Baltimore, Maryland operating as a Clinical Medical Laboratory. The healthcare provider is registered in the NPI registry with number 1053271767 assigned on November 2025. The practitioner's primary taxonomy code is 291U00000X. The provider is registered as an organization and their NPI record was last updated one year ago. The authorized official of this NPI record is Nicholas Giarratano (Director, Provider Enrollment)

NPI
1053271767
Provider Name
JOHNS HOPKINS UNIVERSITY
Entity Type
Organization
Location Address
600 N WOLFE ST BALTIMORE, MD 21287
Location Phone
(410) 955-9540
Mailing Address
6201 GREENLEIGH AVE MIDDLE RIVER, MD 21220
Mailing Phone
(410) 933-0000
Mailing Fax
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
11-14-2025
Last Update Date
11-14-2025
Code Navigator

Establishments like Johns Hopkins University are healthcare facilities that may perform a wide range of laboratory procedures, assisted by doctors and medical technologists. Laboratories can be categorized according to their function as common diagnostic labs or specialty labs that conduct specialized or confirmatory tests. Different clinical laboratories could specialize in clinical chemistry, clinical microbiology, hematology, serology, clinical microscopy, cytopathology, molecular biology, or public health. Please inquire directly with this provider to confirm their test menu.

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

Clinical Medical Laboratory

Taxonomy Code
291U00000X
Type
Laboratories
Taxonomy Description
(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.

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 1053271767, 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 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
0
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
3
Unchanged
Pos 5
2
Doubled → 4
Pos 6
7
Unchanged
Pos 7
1
Doubled → 2
Pos 8
7
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
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 5 → 10 → 1 2 → 4 1 → 2 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 0 + 3 + 4 + 7 + 2 + 7 + 1 + 2 + 24 = 53

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

The next multiple of ten after 53 is 60. The difference is the calculated check digit.

60 - 53 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1053271767.

Other Providers at the Same Location


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

Nurse Practitioner
600 N WOLFE ST, WEINBERG BUILDING ROOM 1123
BALTIMORE, MD 21287
Nurse Anesthetist, Certified Registered
600 N WOLFE ST, BLALOCK 1415
BALTIMORE, MD 21287
Radiology (Diagnostic Radiology)
600 N WOLFE ST
BALTIMORE, MD 21287
Nurse Practitioner (Acute Care)
600 N WOLFE ST
BALTIMORE, MD 21287
Obstetrics & Gynecology
600 N WOLFE ST
BALTIMORE, MD 21287
Pharmacist (Pharmacotherapy)
600 N WOLFE ST
BALTIMORE, MD 21287
Psychiatry & Neurology (Neurology)
600 N WOLFE ST
BALTIMORE, MD 21287
Emergency Medicine
600 N WOLFE ST
BALTIMORE, MD 21287
Obstetrics & Gynecology
600 N WOLFE ST
BALTIMORE, MD 21287
Physician Assistant
600 N WOLFE ST
BALTIMORE, MD 21287
Psychiatry & Neurology (Psychiatry)
600 N WOLFE ST
BALTIMORE, MD 21287
Emergency Medicine
600 N WOLFE ST
BALTIMORE, MD 21287
Internal Medicine (Cardiovascular Disease)
600 N WOLFE ST
BALTIMORE, MD 21287
Ophthalmology
600 N WOLFE ST
BALTIMORE, MD 21287
Internal Medicine
600 N WOLFE ST
BALTIMORE, MD 21287
Internal Medicine (Medical Oncology)
600 N WOLFE ST
BALTIMORE, MD 21287
Internal Medicine (Cardiovascular Disease)
600 N WOLFE ST
BALTIMORE, MD 21287
Pediatrics (Pediatric Gastroenterology)
600 N WOLFE ST
BALTIMORE, MD 21287
Surgery
600 N WOLFE ST
BALTIMORE, MD 21287
Anesthesiology
600 N WOLFE ST
BALTIMORE, MD 21287

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1053271767, enumerated as an "organization" on November 14, 2025.

The provider is located at 600 N WOLFE ST BALTIMORE, MD 21287 and the phone number is (410) 955-9540.

Clinical Medical Laboratory with taxonomy code 291U00000X.