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Edit this profileAt a glance
- 257 Rt 22 East, Green Brook, NJ 08812
About Dr. Chafos
Based in Green Brook, NJ, John N. Chafos, MD is listed in the NPI registry under family practice. John graduated from Tufts University School of Medicine in 1988. John is also listed as specializing in emergency medicine and internal medicine. According to Medicare claims data, John cared for 2,002 Medicare patients across 5,896 services. The services billed most often include injection, methylprednisolone acetate, 1 mg, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and injection, dexamethasone sodium phosphate, 1 mg. NPI 1871673830 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
- (732) 968-8832
- Email not available
Practice Locations
257 RT 22 EAST
Green Brook, NJ 08812
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
Most searched conditions
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
- High blood pressure
- High cholesterol
Digestive
- Acid reflux
- IBS
Genitourinary and reproductive
- Erectile dysfunction
- Heavy periods
Musculoskeletal and pain
- Gout
- Heel pain
Neurologic and behavioral
Respiratory and infectious
- Acute bronchitis
- Asthma
- Sinus infection
Skin
- Acne
- Eczema
Common childhood and ear conditions
- Ear infection
- Pink eye
Pain & Joints
- Arthritis
- Back pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive interventions
- Birth control counseling
- Smoking cessation counseling
Screening and testing
- Cholesterol screening
- Depression screening
- Diabetes and prediabetes screening
- EKG
Diagnostic Tests
- COVID-19 testing
- Rapid Strep and Flu Swabs
- Urine Drug Screen
Exams & Screenings
- Camp and School Physical
- Pre-Op Clearance Exam
Foot and Leg Pain
- Toenail Fungus Treatment
Heart & Circulation
- Blood Pressure Check
Injections
- Immunotherapy
- Vitamin B12 Injections
Lungs & Breathing
- Pulmonary function test
Minor Procedures
- Burn and Wound Care
- Ingrown toenail removal
- Suture removal
Occupational Health
- DOT Physical
Office procedures
- Earwax removal
- Incision and drainage of an abscess
- Superficial foreign-body removal
Pain Management
- Joint injections
Preventive Care
- Chronic Illness Checkup
- Routine Vaccines
- Travel Vaccines And Consult
Respiratory
- Breathing Treatment
Senior Care
- Cognitive Assessment
Sexual & Reproductive Health
- STD Swabs and Screening
Skin Procedures
- Cyst Removal
- Precancerous Sun Spot Freezing
- Skin Tag Removal
- Wart Removal
Sleep Health
- At-Home Sleep Study Order
Urgent Care Procedures
- Stitches and Laceration Repair
Wellness & Weight
- Weight Management Consult
Women's Health
- Hormone Replacement Therapy Consultation
Procedures Most Often Billed to Medicare
5,896 services · 2,002 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
263 | More often than most peers in Family Practice |
| X-ray of chest, 2 views | Imaging | 71046 |
86 | More often than most peers in Family Practice |
| X-ray of lower and sacral spine, 2-3 views | Imaging | 72100 |
16 | As often as other peers in Family Practice |
| X-ray of knee, 3 views | Imaging | 73562 |
15 | Less often than most peers in Family Practice |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
348 | More than most peers in Family Practice |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
96 | More often than most peers in Family Practice |
| Influenza vaccine, trivalent derived from cell cultures | Treatment | 90661 |
16 | Less often than most peers in Family Practice |
| Administration of vaccine | Treatment | 90471 |
14 | Less often than most peers in Family Practice |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
2,021 | More often than most peers in Family Practice |
| Injection, dexamethasone sodium phosphate, 1 mg | Drug given | J1100 |
543 | More often than most peers in Family Practice |
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.
Also at this address 3
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other family practices in Green Brook 8
Same specialty, same city.
Trained at Tufts University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1988 at Tufts University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in NJ who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Chafos?
Dr. Chafos is a family practice in Green Brook, NJ. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Chafos's address?
Dr. Chafos is listed at 257 Rt 22 East, Green Brook, NJ 08812. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Chafos?
The number on file is (732) 968-8832. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Chafos's NPI number?
Dr. Chafos's National Provider Identifier is 1871673830. 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. Chafos train?
Dr. Chafos attended Tufts University School of Medicine, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Chafos been practicing?
Dr. Chafos has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Chafos perform?
According to Medicare billing data, Dr. Chafos performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of chest, 2 views and x-ray of lower and sacral spine, 2-3 views; provides treatments such as injection of drug or substance under skin or into muscle and routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chafos confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chafos. If this is you, claiming it is free.
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