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Dr. Mark Schaeffer, MD

Internal Medicine*
5.0 (2)
Map Pin Small Princeton, NJ
Call for new patient details
40 years of experience

Overview of Dr. Mark Schaeffer, MD

Dr. Mark Schaeffer, MD is an Internal Medicine Specialist in Princeton, NJ. They specialize in Internal Medicine, has 40 years of experience, and is board certified in Internal Medicine. They graduated from NEW YORK Medical College and is affiliated with Cleveland Clinic. Patients rated Dr. Schaeffer an average 5.0 star rating.

Dr. Schaeffer works at Practice in Princeton, NJ. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

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Dr. Schaeffer's Office Locations

  1. 1
    Internal Medicine Associates
    281 Witherspoon St Ste 220, Princeton, NJ 08540 Icon Directions Right Arrow Directions Phone Icon (609) 921-1680

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • Cleveland Clinic

Experience & Treatment Frequency

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What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

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May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Arterial Blood Gas Test (ABG)
Electrocardiogram (EKG)
Abdominal Pain

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Arterial Blood Gas Test (ABG)
Electrocardiogram (EKG)
Abdominal Pain
Abnormal Thyroid
Acute Deep Vein Thrombosis (DVT)
Acute Pharyngitis
Acute Sinusitis
Acute Upper Respiratory Infection
Acute Venous Embolism Thrombosis
ADHD and-or ADD
All Headaches (incl. Migraine)
Allergic Rhinitis
Anemia
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Anxiety
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Arthritis
Asthma
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Back Pain
Balanoposthitis
Bladder Infection
Blood in Urine (Hematuria)
Bronchitis
Bursitis
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Calcium Metabolism Disorders
Carpal Tunnel Syndrome
Cellulitis
Chest Pain
Chronic Deep Vein Thrombosis (DVT)
Chronic Fatigue Syndrome
Chronic Neck Pain
Chronic Pain
Cluster Headache
Confusion
Constipation
Contact Dermatitis
COPD (Chronic Obstructive Pulmonary Disease)
Cough
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Deep Vein Thrombosis (DVT)
Diabetes Type 1
Diabetes Type 2
Diabetic Polyneuropathy
Difficulty With Walking
Dizziness
Dysentery
Dyslipidemia
Ear Ache
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Eczema and Contact Dermatitis
Enlarged Prostate (BPH)
Enteritis
Esophagitis
Excessive Sweating
Fever
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Gait Abnormality
Gastritis
Gastroesophageal Reflux Disease (GERD)
Headache
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Heart Disease
Heart Palpitations
Heartburn
Hernia
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Herpes Zoster Without Complication
Hypercalcemia
Hyperkalemia
Hyperlipidemia
Hypertension
Hypogonadism
Hypokalemia
Hypothyroidism
Indigestion
Insomnia
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Iron Metabolism Disorders
Joint Pain
Limb Pain
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Low Back Pain
Lyme Disease
Malaise and Fatigue
Menopausal and Postmenopausal Disorders
Migraine
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Mineral Metabolism Disorders
Muscle Weakness
Nail and Nail Bed Infection
Nasopharyngitis
Nausea
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Neck Muscle Strain
Nighttime Urination (Nocturia)
Obesity
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Osteoarthritis
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteopenia
Osteoporosis
Otitis Media
Painful Urination (Dysuria)
Patellofemoral Pain Syndrome (PFPS)
Perimenopause
Pharyngitis
Pneumonia
Pollen Allergy
Polyneuropathy
Polyuria
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Postnasal Drip
Proteinuria
Purpura
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Radiculopathy
Restless Leg Syndrome
Sarcoidosis
Sciatica (Not Due to Disc Displacement)
Shingles
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Shortness of Breath
Sinus Bradycardia
Sinus Tachycardia
Sinusitis
Sleep Apnea
Sleep-Related Leg Cramp
Sprains and Strains (incl. Muscle Tear)
Symptomatic Menopause
Testicular Dysfunction
Thyroid Goiter
Transient Ischemic Attack (TIA)
Tremor
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Urinary Incontinence
Urinary Stones
Urinary Tract Infection (UTI)
Vertigo
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Vitamin B Deficiency
Vitamin D Deficiency
Wheezing
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Advance Directive End of Life Planning
Diabetes Counseling
Immunization Administration
Wellness Examination
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    Ratings & Reviews
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    5.0
    Average provider rating
    Based on 2 ratings
    Patient Ratings (2)
    5 Star
    (2)
    4 Star
    (0)
    3 Star
    (0)
    2 Star
    (0)
    1 Star
    (0)
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    Dr. Schaeffer's Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Schaeffer

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

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    About Dr. Mark Schaeffer, MD

    Specialties*
    • Internal Medicine

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Years of Experience
    • 40 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.

    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1194866087
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Medical Education
    • NEW YORK Medical College
    Medical Education
    Board Certifications
    • Internal Medicine
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Schaeffer has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    2 patients have reviewed Dr. Schaeffer. The overall rating for this provider is 5.0. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Schaeffer.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Schaeffer, there are benefits to both methods. A person calling to schedule an with Dr. Schaeffer appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

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