Are you Mary A. Fitzsimons, M.D? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 3901 Lone Tree Way, Antioch, CA 94509
About Dr. Fitzsimons
Based in Antioch, CA, Mary A. Fitzsimons, M.D is listed in the NPI registry under emergency medicine. Mary graduated from Northwestern University Feinberg Medical School in 1981. Medicare claims data shows Mary provided 775 services to 728 patients. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, emergency department visit with high level of medical decision making, and emergency department visit with moderate level of medical decision making. NPI 1053330431 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
- (925) 779-7273
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
3901 LONE TREE WAY
Antioch, CA 94509
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
Bites & Stings
Brain & Nerves
- Delirium
- Stroke
- Fainting and syncope
- Seizure in Child
- Severe headache or sudden migraine
- Status epilepticus
- Transient ischemic attack
Endocrine & Metabolic
Eye Care
Injuries & Trauma
- Animal or dog bite
- Bone fractures
- Deep cut or wound
- Dislocated joint
- Severe burn
- Sprains and muscle strains
- Traumatic brain injury
Rashes & allergy
Skin & Infections
Urinary & Bladder
Women's Health
Abdomen & Digestion
Allergy & Immune
Allergy & Immunology
Blood & Circulation
Breathing
Digestion & Stomach
Ear, Nose & Throat
Environmental
Eye Emergency
General Emergency
Heart & Chest
Heart & Circulation
Heart & Lungs
Infections & Illness
Lungs & Breathing
Men's Health
Poisoning & Environmental
Poisoning & Toxins
Spine & Back
Urinary & Kidney
Procedures & services
Abdominal Procedures
Breathing & Airway
Critical Care
Diagnostic testing
Diagnostics
Ear, Nose & Throat
Eye & ENT
Heart & Diagnostics
Imaging & Diagnostics
Injections & Vaccines
Kidney Care
Lung & Respiratory
Medications
Mental Health
Minor Procedures
- Nasal cautery for nosebleeds
- Tick Removal
- Urinary catheter insertion
- Fishhook or embedded splinter removal
- Incision and drainage of an abscess
Minor Trauma
Orthopedics
Poisoning & Toxicology
Specialized Care
Stroke & Vascular
Toxicology
Women's Health
Wound Care
- Burn dressing and care
- Skin glue for cuts
- Stitches and Laceration Repair
- Wound cleaning and debridement
- Wound stapling
Airway & Breathing
Anesthesia & Sedation
Digestive Care
Eye Care
Heart Care
Orthopedic Procedures
Supportive Care
Procedures Most Often Billed to Medicare
775 services · 728 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
271 | More often than most peers in Emergency Medicine |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
239 | More often than most peers in Emergency Medicine |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
102 | More often than most peers in Emergency Medicine |
| Critical care, first 30-74 minutes | Office visit | 99291 |
96 | More often than most peers in Emergency Medicine |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
45 | More often than most peers in Emergency Medicine |
| Critical care, each additional 30 minutes | Office visit | 99292 |
22 | 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.
Other emergency physicians at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
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 — 26 related providers in 4 groups
Other emergency physicians in Antioch 2
Same specialty, same city.
Trained at Northwestern University Feinberg Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at Northwestern University Feinberg Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Mary A. Fitzsimons?
Mary A. Fitzsimons is an emergency physician in Antioch, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Emergency Medicine”.
NPI registry
What is Mary A. Fitzsimons's address?
Mary A. Fitzsimons is listed at 3901 Lone Tree Way, Antioch, CA 94509. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Mary A. Fitzsimons?
The number on file is (925) 779-7273. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mary A. Fitzsimons?
Mary A. Fitzsimons's National Provider Identifier is 1053330431. 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 Mary A. Fitzsimons train?
Mary A. Fitzsimons attended Northwestern University Feinberg Medical School, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Mary A. Fitzsimons have?
Mary A. Fitzsimons has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What procedures does Mary A. Fitzsimons perform?
According to Medicare billing data, Mary A. Fitzsimons provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Mary A. Fitzsimons's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mary A. Fitzsimons. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.