Individual Healthcare Provider
Mark David Ewalt, M.D.
Provider's NPPES record last updated: August 25, 2021
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1497998512
- Primary Specialty
- Pathology — Molecular Genetic Pathology
- Practice Location
- New York, New York
- Sole Proprietor
- No
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 17, 2026, 11:52 PM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Pathology
Molecular Genetic Pathology
Allopathic & Osteopathic Physicians
A molecular genetic pathologist is expert in the principles, theory and technologies of molecular biology and molecular genetics. This expertise is used to make or confirm diagnoses of Mendelian genetic disorders, disorders of human development, infectious diseases and malignancies, and to assess the natural history of those disorders. A molecular genetic pathologist provides information about gene structure, function and alteration and applies laboratory techniques for diagnosis, treatment and prognosis for individuals with related disorders.
Taxonomy code 207ZP0007X Pathology
Cytopathology
Allopathic & Osteopathic Physicians
A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the "Pap" test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.
Taxonomy code 207ZC0500XPathology
Hematology
Allopathic & Osteopathic Physicians
A hematopathologist is expert in diseases that affect blood cells, blood clotting mechanisms, bone marrow and lymph nodes. This physician has the knowledge and technical skills essential for the laboratory diagnosis of anemias, leukemias, lymphomas, bleeding disorders and blood clotting disorders.
Taxonomy code 207ZH0000X
Provider-Reported License Information
- Pathology (Colorado)
- DR.0058760
- Pathology (Colorado)
- DR.0058760
- Pathology (California)
- A121762
- Pathology (Colorado)
- DR.0058760
Practice Locations
Practice Location
1275 York Avenue
Dept of Pathology, Box #36
New York, New York 10065
Phone: (212) 639-8137
Additional Practice Location
12605 E 16th Ave
Aurora, Colorado 80045-2545
Phone: (720) 848-0000
Additional Practice Location
8700 Beverly Blvd
Spt Room 4703
West Hollywood, California 90048-1804
Phone: (310) 423-4551
Record Information
- Enumeration Date
- April 20, 2009
- Provider's NPPES Record Last Updated
- August 25, 2021
- Certification Date
- August 25, 2021
- NPISignal NPPES Dataset
- August 2026
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