Physician Profile
Jeffrey J. Hallazgo, M.D.
Unclaimed ProfileAbout Dr. Hallazgo
Jeffrey J. Hallazgo, M.D. practices emergency medicine in Fenton, MO. Jeffrey is a 1984 graduate of University of Missouri, Kansas City, School of Medicine. Jeffrey is also listed as specializing in internal medicine. According to Medicare claims data, Jeffrey cared for 344 Medicare patients across 435 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, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, and administration of influenza virus vaccine. The provider's National Provider Identifier (NPI) is 1073538302.
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
- (636) 326-6100
- Email not available
Practice Locations
714 GRAVOIS RD SUITE 100
Fenton, MO 63026
12680 Olive Blvd Ste 100
Creve Coeur, MO 63141
Conditions Commonly Evaluated or Treated
Within Emergency 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
Abdomen & Digestion
- Appendicitis
- Lower gastrointestinal bleeding
- Vomiting or throwing up blood
Allergy & Immune
- Angioedema
Allergy & Immunology
- Severe Allergic Reaction
Bites & Stings
- Snake Bite or Venomous Sting
- Spider or insect sting reaction
Blood & Circulation
Brain & Nerves
- Delirium
- Fainting and syncope
- Seizure in Child
- Severe headache or sudden migraine
- Status epilepticus
- Stroke
- Transient ischemic attack
Breathing
- Choking or swallowed object
- Coughing up blood
- Severe asthma attack
- Shortness of breath
Digestion & Stomach
- Abdominal Pain
- Acute gallbladder inflammation
- Bowel obstruction
Ear, Nose & Throat
- Nosebleeds
Endocrine & Metabolic
- Dangerous high blood sugar
- Dangerously low blood sugar
Environmental
- Heat stroke
- Hypothermia and frostbite
Eye Care
- Open-globe eye injury
Eye Emergency
General Emergency
- Severe dehydration
- Uncontrolled bleeding
Heart & Chest
- Acute coronary syndrome
- Heart palpitations
Heart & Circulation
- Dangerous high blood pressure
Heart & Lungs
Infections & Illness
- High fever
- Sepsis or blood infection
Injuries & Trauma
- Animal or dog bite
- Bone fractures
- Deep cut or wound
- Dislocated joint
- Severe burn
- Sprains and muscle strains
- Traumatic brain injury
Lungs & Breathing
- Collapsed lung
Men's Health
- Testicular torsion
Poisoning & Environmental
- Smoke Inhalation
Poisoning & Toxins
- Drug overdose or poisoning
Skin & Infections
- Skin abscess or boil
Spine & Back
- Severe back pain
Urinary & Bladder
- Inability to pee
Urinary & Kidney
- Kidney stones
Women's Health
- Ectopic pregnancy
- Heavy vaginal bleeding
Procedures & services
Abdominal Procedures
- Paracentesis
Airway & Breathing
- Emergency surgical airway
Anesthesia & Sedation
- Moderate dental sedation
Breathing & Airway
- Breathing Treatment
- Emergency intubation
Critical Care
- Blood transfusion
- Central line placement
- Chest tube insertion
- CPR and defibrillation
Diagnostics
- Lumbar puncture
- Rapid blood work
Digestive Care
- Urgent upper endoscopy
Ear, Nose & Throat
- Nasal packing for nosebleed
Eye & ENT
- Eye-pressure measurement
- Foreign Object Removal from Eye
- Superficial foreign-body removal
Eye Care
- Emergency Eye Flushing
Heart & Diagnostics
- Cardioversion for rapid heartbeat
- EKG
Heart Care
- Temporary Pacemaker Placement
Imaging & Diagnostics
- Emergency CT scan
- Emergency MRI scan
- Emergency ultrasound
- Emergency X-ray
Injections & Vaccines
- Rabies shot series
- Tetanus shot
Kidney Care
- Emergency dialysis
Lung & Respiratory
- Chest Needle Decompression
- Draining lung fluid
Medications
- Emergency epinephrine injection
- IV medication for severe nausea
- IV medication for severe pain
Mental Health
- Emergency psychiatric evaluation
Minor Procedures
- Fishhook or embedded splinter removal
- Incision and drainage of an abscess
- Nasal cautery for nosebleeds
- Tick Removal
- Urinary catheter insertion
Minor Trauma
- Stuck ring removal
Orthopedic Procedures
- Joint injection or aspiration
Orthopedics
- Popping a dislocated joint back in place
- Splinting and temporary casting
Poisoning & Toxicology
- Antivenom treatment
Specialized Care
- Sexual assault forensic exam
Stroke & Vascular
- Clot busting medication for stroke
Supportive Care
- IV fluids
Toxicology
- Narcan overdose reversal
- Stomach pumping or activated charcoal
Women's Health
- Emergency pelvic exam
Wound Care
- Burn dressing and care
- Skin glue for cuts
- Stitches and Laceration Repair
- Wound cleaning and debridement
- Wound stapling
Procedures Most Often Billed to Medicare
435 services · 344 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
34 | As often as other peers in Emergency Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
245 | As often as other peers in Emergency Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
119 | As often as other peers in Emergency Medicine |
| Administration of influenza virus vaccine | Billing code | G0008 |
37 | As often as other peers in Emergency 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.
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.
Other emergency physicians in Fenton 4
Same specialty, same city.
Trained at University of Missouri, Kansas City, School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 9 related providers in 2 groups
Class of 1984 at University of Missouri, Kansas City, School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 1
Providers in MO who bill this service to Medicare most often.
Common questions
What kind of doctor is Jeffrey J. Hallazgo?
Jeffrey J. Hallazgo is an emergency physician in Fenton, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Emergency Medicine”.
NPI registry
What is Jeffrey J. Hallazgo's address?
Jeffrey J. Hallazgo is listed at 714 Gravois Rd Suite 100, Fenton, MO 63026. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Jeffrey J. Hallazgo?
The number on file is (636) 326-6100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Jeffrey J. Hallazgo's NPI number?
Jeffrey J. Hallazgo's National Provider Identifier is 1073538302. 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 Jeffrey J. Hallazgo train?
Jeffrey J. Hallazgo attended University of Missouri, Kansas City, School of Medicine, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How long has Jeffrey J. Hallazgo been practicing?
Jeffrey J. Hallazgo has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What procedures does Jeffrey J. Hallazgo perform?
According to Medicare billing data, Jeffrey J. Hallazgo provides treatments such as influenza vaccine split virus, preservative free, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Jeffrey J. Hallazgo confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Jeffrey J. Hallazgo. If this is you, claiming it is free.
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