JOHNS HOPKINS UNIVERSITY
NPI 1447221726
Clinical Medical Laboratory in Baltimore, MD

NPI Status: Active since January 27, 2006

Contact Information

600 N WOLFE ST
CARNEGIE 417
BALTIMORE, MD
ZIP 21287
Phone: (410) 933-1328

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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 1447221726 assigned on January 2006. The practitioner's primary taxonomy code is 291U00000X. The provider is registered as an organization and their NPI record was last updated July 2025. The provider's . The authorized official of this NPI record is Nick Giarrantano (Prov)

NPI
1447221726
Provider Legal Name
JOHNS HOPKINS UNIVERSITY
Other Organization Name
Other Name Type
(6)
Entity Type
Organization
Location Address
600 N WOLFE ST CARNEGIE 417 BALTIMORE, MD 21287
Location Phone
(410) 933-1328
Mailing Address
PO BOX 64478 BALTIMORE, MD 21264
Mailing Phone
(410) 933-1328
Is Sole Proprietor?
No
Is Organization Subpart?
Yes
Enumeration Date
01-27-2006
Last Update Date
07-22-2025
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.

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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

Clinical Medical Laboratory

Taxonomy Code
291U00000X
Type
Laboratories
License State
MD
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.

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

NICK GIARRANTANO

Authorized Official Title
PROV
Authorized Official Phone
(410) 933-0000

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
W446JOOTHER (01)MDBLUE CROSS/BLUE SHIELD
171218700MEDICAID (05)MD 
690009457OTHER (01)MDRRMC
M8950001OTHER (01)MDCARFIRST BLUE SHIELD

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Cell examination of specimen, concentration technique

Cell examination of a specimen using a concentration technique is a lab process that enhances the detection of cells in a sample. This method helps to focus on key areas of the sample, making it easier to spot abnormalities or changes. It's a crucial part of diagnosing and monitoring certain health conditions.

This service was performed 20 times for 19 patients

Cell examination of specimen, selective cellular enhancement technique

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

This service was performed 1,025 times for 717 patients

Chromosome analysis for genetic defects, analyze 100-300 cells

Chromosome analysis is a test done on cells to identify any genetic defects. By studying 100-300 cells, it gives a comprehensive view of your genetic makeup. This helps in understanding any potential health risks you may carry.

This service was performed 44 times for 25 patients

Dna testing for genetic defects

DNA testing for genetic defects involves examining your DNA, the unique molecules that carry instructions for your body's functioning. The test identifies changes in chromosomes, genes, or proteins that could lead to a genetic disorder. It's a preventative measure to manage potential health risks.

This service was performed 133 times for 29 patients

Evaluation of fine needle aspirate with interpretation and report

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

This service was performed 106 times for 71 patients

Flow cytometry technique for dna or cell analysis, 16 or more markers

Flow cytometry is a method used to measure and analyze cells. It uses a beam of light to detect up to 16 or more markers on cells, helping to identify their type, function, or abnormalities. This technique aids in diagnosing various health conditions.

This service was performed 56 times for 55 patients

Flow cytometry technique for dna or cell analysis, 9 to 15 markers

Flow cytometry is a technique used to measure physical and chemical characteristics of cells or particles. It can analyze multiple markers (9 to 15) on a cell, helping to identify its type and function. This process can also examine DNA within cells for any abnormalities.

This service was performed 11 times for 11 patients

Flow cytometry technique for dna or cell analysis, each additional marker

Flow cytometry is a technique that helps analyze the physical and chemical characteristics of cells or particles. When an additional marker is used, it aids in identifying specific cell types or stages of disease. This helps in precise diagnosis and treatment planning.

This service was performed 956 times for 63 patients

Flow cytometry technique for dna or cell analysis, first marker

Flow cytometry is a technique used to examine microscopic particles, like cells or DNA. It employs a beam of light to detect and measure physical and chemical characteristics of these particles. The 'first marker' refers to a specific characteristic or feature used to identify a particular cell or particle.

This service was performed 64 times for 63 patients

Gene analysis (epidermal growth factor receptor), common variants

Gene analysis of the epidermal growth factor receptor (EGFR) identifies common variants in this particular gene. This test helps in understanding your body's response to certain medications. It aids in personalized treatment planning, ensuring the most effective care.

This service was performed 12 times for 12 patients

Gene analysis (v-ki-ras2 kirsten rat sarcoma viral oncogene) variants in codons 12 and 13

Gene analysis for v-ki-ras2 kirsten rat sarcoma viral oncogene variants in codons 12 and 13 is a test to identify specific changes in your genes. These changes could potentially indicate a higher risk for certain types of cancer.

This service was performed 19 times for 19 patients

Gene analysis (v-kit hardy-zuckerman 4 feline sarcoma viral oncogene homolog), targeted sequence

Gene analysis of v-kit hardy-zuckerman 4 feline sarcoma viral oncogene homolog (KIT) is a test that studies a specific gene associated with cell growth and development. It helps in identifying any alterations in this gene that may lead to health issues.

This service was performed 19 times for 19 patients

Gene analysis (v-raf murine sarcoma viral oncogene homolog b1)

Gene analysis of v-raf murine sarcoma viral oncogene homolog b1 (BRAF) is a test that examines your DNA to identify changes or mutations in the BRAF gene. This information can help in diagnosing and treating certain diseases, including some types of cancer.

This service was performed 44 times for 44 patients

Gene analysis for cancer (neuroblastoma)

Gene analysis for neuroblastoma is a test that studies your genes to identify abnormalities linked to this type of cancer. It helps doctors tailor treatment plans, potentially improving outcomes and reducing side effects.

This service was performed 28 times for 28 patients

Genetic sequencing localization, each additional procedure

Genetic sequencing localization is a process where specific regions of your DNA are identified and studied. If you're having additional procedures, it simply means that more areas of your DNA are being examined. This helps to understand your genetic makeup better and can assist in identifying potential health risks.

This service was performed 26 times for 18 patients

Genetic sequencing localization, initial procedure

Genetic sequencing localization is a process to identify where specific genes are located in your DNA. During the initial procedure, a sample of your cells is collected, usually through a simple swab or blood test. This data is then analyzed to pinpoint the location of certain genes. This can help understand your genetic makeup and potential health risks.

This service was performed 108 times for 102 patients

Immunologic analysis technique on body fluid, other fluids with concentration

Immunologic analysis is a diagnostic method that assesses your body fluids to detect health issues. It involves concentrating these fluids to enhance detection of specific proteins or cells. It helps identify immune system responses, aiding in accurate diagnosis and treatment.

This service was performed 100 times for 94 patients

Immunologic analysis technique on serum (immunofixation)

Immunofixation is a lab test that helps identify proteins called immunoglobulins in your blood serum. These proteins are part of your immune system. Changes in their levels can indicate certain diseases. The test is simple and only requires a blood sample.

This service was performed 496 times for 391 patients

Microscopic genetic analysis of tissue, manual, each additional multiplex stain procedure

Microscopic genetic analysis of tissue is a detailed lab process that examines your cells' genetic material. If more than one stain procedure is needed, it's termed an 'additional multiplex stain procedure'. This helps to highlight different components within your cells, aiding in accurate diagnosis and treatment planning.

This service was performed 52 times for 46 patients

Microscopic genetic analysis of tumor, manual

Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.

This service was performed 982 times for 356 patients

Pap test

A Pap test is a routine exam that checks for changes in cells that could signal a health concern. During this test, a small sample of cells is gently collected from the lower region of the body. The sample is then examined under a microscope to ensure everything looks normal.

This service was performed 59 times for 55 patients

Pap test, manual screening

A Pap test is a routine procedure that checks for unusual changes in cells. During the manual screening, a small sample of cells is gently collected from the lower region of the body. These cells are then examined under a microscope to ensure your health.

This service was performed 552 times for 545 patients

Pathology examination of tissue using a microscope, intermediate complexity

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

This service was performed 4,935 times for 2,164 patients

Pathology examination of tissue using a microscope, limited examination

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

This service was performed 11 times for 11 patients

Pathology examination of tissue using a microscope, moderately high complexity

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

This service was performed 444 times for 201 patients

Pathology examination of tissue using a microscope, moderately low complexity

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

This service was performed 181 times for 149 patients

Protein measurement, body fluid

A protein measurement of body fluid is a test that gauges the amount of proteins in your fluids. This analysis helps in detecting various health conditions. It's done via a simple sample collection process, usually from blood or urine, in a safe and painless manner.

This service was performed 186 times for 181 patients

Protein measurement, serum

A serum protein measurement is a blood test that determines the levels of proteins in your blood. It is used to evaluate your overall health, and diagnose nutritional problems, kidney disease, liver disease, or immune disorders.

This service was performed 514 times for 485 patients

Special stained specimen slides to examine tissue including interpretation and report

Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.

This service was performed 142 times for 115 patients

Special stained specimen slides to examine tissue, each additional procedure

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

This service was performed 2,829 times for 849 patients

Special stained specimen slides to examine tissue, each multiplex procedure

Special stained specimen slides are used to study tissue in detail. This multiplex procedure involves applying different dyes to the tissue sample on a slide to highlight specific elements. These colors help identify any abnormalities in the tissue, aiding in accurate diagnosis and treatment planning.

This service was performed 256 times for 185 patients

Special stained specimen slides to examine tissue, initial procedure

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

This service was performed 1,443 times for 1,292 patients

Special stained specimen slides to identify organisms including interpretation and report

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

This service was performed 63 times for 32 patients

Surgical pathology consultation and report on referred material requiring preparation of slides

A surgical pathology consultation involves the examination of tissue removed during surgery. The tissue is processed and slides are prepared for detailed study under a microscope. The findings are then compiled into a report to help guide your treatment plan.

This service was performed 827 times for 817 patients

Surgical pathology consultation and report on referred slides prepared elsewhere

A surgical pathology consultation involves reviewing slides prepared at a different lab to confirm or clarify a diagnosis. It's a second opinion to ensure accuracy. A report with findings and interpretations is then provided for your doctor's reference.

This service was performed 4,052 times for 3,947 patients

Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method

This procedure involves taking a small tissue sample from your gland located beneath your bladder. The sample is then examined under a microscope by a pathologist to check for any abnormalities or diseases. This is a standard method to ensure your well-being.

This service was performed 363 times for 360 patients

Test for detecting genes associated with cancer

A genetic test for cancer is a medical test that checks your DNA for changes or mutations that might put you at risk for cancer. It's a proactive step to understand your health better and possibly take preventive measures if needed.

This service was performed 92 times for 91 patients

Reviews for JOHNS HOPKINS UNIVERSITY

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1447221726
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
248742274
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 8 + 7 + 4 + 2 + 2 + 7 + 4 + 24 = 64
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 64 = 66

The NPI number 1447221726 is valid because the calculated check digit 6 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


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

MS. LAURA M HOSTOVICH CRNP

Nurse Practitioner

600 N WOLFE ST
WEINBERG BUILDING ROOM 1123
BALTIMORE, MD
ZIP 21287

(410) 614-4501

BELINDA L GARDNER C.R.N.A.

Nurse Anesthetist, Certified Registered

600 N WOLFE ST
BLALOCK 1415
BALTIMORE, MD
ZIP 21287

(443) 287-2937

DR. ALAN G SECHTIN M.D.

Radiology

(Diagnostic Radiology)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-5000

DIANE LAW NP

Nurse Practitioner

(Acute Care)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 502-5648

MS. JENNIFER LYNN WILSON CRNP

Registered Nurse

(Neonatal Intensive Care)

600 N WOLFE ST
CMCS 2 - NICU
BALTIMORE, MD
ZIP 21287

(410) 955-5255

JENELL SHEREE COLEMAN MD MPH

Obstetrics & Gynecology

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 502-3698

DR. PATRICIA ALPHONSINE ROSS PHARM.D.

Pharmacist

(Pharmacotherapy)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 434-1000

KATRIN INGRID ANDREASSON M.D.

Psychiatry & Neurology

(Neurology)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-9441

WALTER FLEMING ATHA M.D.

Emergency Medicine

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-2280

JEAN RENE ANDERSON M.D.

Obstetrics & Gynecology

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-6700

ALICE M ARMOUR P.A.-C.

Physician Assistant

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-3870

SHANNON RAE BARNETT M.D.

Psychiatry & Neurology

(Psychiatry)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-6181

GARY B GREEN M.D.

Emergency Medicine

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-2280

LAWRENCE GRIFFITH M.D.

Internal Medicine

(Cardiovascular Disease)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-3116

HEATHER BARTLETT CASPARIS M.D.

Ophthalmology

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-5080

MARY CATHERINE BEACH M.D.

Internal Medicine

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-9434

ATUL BEDI M.D.

Internal Medicine

(Medical Oncology)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-8964

ERNEST N ARNETT M.D.

Internal Medicine

(Cardiovascular Disease)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-3116

SUSAN WRIGHT AUCOTT M.D.

Pediatrics

(Pediatric Gastroenterology)

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-2000

CHARLES MITCHELL BALCH M.D.

Surgery

600 N WOLFE ST
BALTIMORE, MD
ZIP 21287

(410) 955-1658

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1447221726, enumerated as an "organization" on January 27, 2006.

The provider is located at 600 N WOLFE ST CARNEGIE 417 BALTIMORE, MD 21287 and the phone number is (410) 933-1328.

Clinical Medical Laboratory with taxonomy code 291U00000X.

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