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NPISignal

Individual Healthcare Provider

Mark E Wylam, M.D.

NPI Record: ActiveInternal Medicine — Critical Care Medicine
NPI1003880865
Orange, California

Provider's NPPES record last updated: October 27, 2025

Overview

Entity Type
Individual Healthcare Provider
NPI
1003880865
Primary Specialty
Internal Medicine — Critical Care Medicine
Practice Location
Orange, California
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 identified

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 18, 2026, 5:40 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

Not checked

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.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Internal Medicine

    Critical Care Medicine

    Allopathic & Osteopathic Physicians

    Primary

    An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

    Taxonomy code 207RC0200X
  • Internal Medicine

    Allopathic & Osteopathic Physicians

    A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

    Taxonomy code 207R00000X
  • General Practice

    Allopathic & Osteopathic Physicians

    A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.

    Taxonomy code 208D00000X
  • Internal Medicine

    Pulmonary Disease

    Allopathic & Osteopathic Physicians

    An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

    Taxonomy code 207RP1001X
  • Internal Medicine

    Cardiovascular Disease

    Allopathic & Osteopathic Physicians

    An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

    Taxonomy code 207RC0000X

Provider-Reported License Information

Internal Medicine (California)
197177
Internal Medicine (California)
197177
General Practice (Minnesota)
40622
Internal Medicine (California)
197177
Internal Medicine (Minnesota)
40622
Internal Medicine (Minnesota)
40622
License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

Practice Locations

Practice Location

101 the City Dr S

Orange, California 92868-3201

Phone: (714) 456-7890

Additional Practice Location

200 1st St Sw

Rochester, Minnesota 55905-0001

Phone: (507) 284-2511

Record Information

Enumeration Date
February 16, 2006
Provider's NPPES Record Last Updated
October 27, 2025
Certification Date
October 27, 2025
NPISignal NPPES Dataset
August 2026

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