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- 336 S River Ave, Holland, MI 49423
About Dr. Duncan
Based in Holland, MI, Margret Duncan, MD is listed in the NPI registry under family medicine. Margret graduated from Wayne State University School of Medicine in 1997. According to Medicare claims data, Margret cared for 108 Medicare patients across 174 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, hemoglobin a1c level, and established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more. NPI 1114940434 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (616) 394-3788
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
336 S RIVER AVE
Holland, MI 49423
Conditions Commonly Evaluated or Treated
Within Family Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Bariatrics
Cancer Prevention
Cancer risk
Digestive
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Wounds & skin
Most searched conditions
Cardiometabolic
Genitourinary and reproductive
Musculoskeletal and pain
Neurologic and behavioral
Respiratory and infectious
Skin
Common childhood and ear conditions
Pain & Joints
Procedures & services
Addiction & habits
Bladder & bowel
Breathing
Cancer Screening
Cancer screening
Checkups & exams
Chronic illness
Diagnostic testing
Diagnostic Tests
- COVID-19 Rapid Test
- COVID-19 testing
- Rapid Flu Swab
- Rapid Strep and Flu Swabs
- Urine Pregnancy Test
- Urine Drug Screen
Diagnostics & screening
Environmental health
Exams
Exams & Screenings
Fitness & body composition
Foot and Leg Pain
Heart & Circulation
Heart & circulation
Immunizations
Infection & Microbiology Tests
Lifestyle & Prevention
Longevity
Lower endoscopy
Metabolic health
Minor Procedures
Occupational health
Occupational Health
Office procedures
- Minor laceration repair
- Removal of a minor skin lesion
- Superficial foreign-body removal
- Earwax removal
- Incision and drainage of an abscess
Post-Op Care
Preventive and evaluation
Preventive Care
Preventive imaging
Preventive interventions
- Vaccinations and immunizations
- Weight-management counseling
- Birth control counseling
- Smoking cessation counseling
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
Screening and testing
- Blood pressure screening
- Diabetes and prediabetes screening
- Point-of-care laboratory testing
- Cholesterol screening
- Depression screening
- EKG
Skin Procedures
Sleep Health
Travel Health
Travel medicine
Urgent Care Procedures
Wellness
Wellness & Screening
Wellness & Weight
Women's Health
Workplace health
Wound care
Wounds & skin
Sleep
Most searched procedures
Injections
- Immunotherapy
- Vitamin B12 Injections
Lungs & Breathing
- Pulmonary function test
Pain Management
Respiratory
Senior Care
Sexual & Reproductive Health
Procedures Most Often Billed to Medicare
174 services · 108 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Assessment of emotional or behavioral problems | Treatment | 96127 |
12 | Less often than most peers in Family Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
77 | Less often than most peers in Family Medicine |
| Hemoglobin a1c level | Lab test | 83036 |
32 | As often as other peers in Family Medicine |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
30 | As often as other peers in Family Medicine |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
12 | Less often than most peers in Family Medicine |
| Administration of influenza virus vaccine | Billing code | G0008 |
11 | Less often than most peers in Family Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other family doctors at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other family doctors in Holland 8
Same specialty, same city.
Trained at Wayne State University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at Wayne State University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Assessment of emotional or behavioral problems 8
Providers in MI who bill this service to Medicare most often.
Common questions
What does Dr. Duncan specialize in?
Dr. Duncan is a family doctor in Holland, MI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Family Medicine”.
NPI registry
Where is Dr. Duncan located?
Dr. Duncan is listed at 336 S River Ave, Holland, MI 49423. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Duncan's phone number?
The number on file is (616) 394-3788. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Duncan's NPI number?
Dr. Duncan's National Provider Identifier is 1114940434. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Duncan go to medical school?
Dr. Duncan attended Wayne State University School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Duncan been practicing?
Dr. Duncan has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Duncan do most often?
According to Medicare billing data, Dr. Duncan provides treatments such as assessment of emotional or behavioral problems, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Duncan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Duncan. If this is you, claiming it is free.
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Guide.md listings do not constitute medical advice or an endorsement.