Physician Profile
Holly Day, M.D.
Unclaimed ProfileAbout Dr. Day
Listed in the NPI registry as a hospitalist, Holly Day, M.D. practices in San Antonio, TX. Holly graduated from University of Texas Medical School at San Antonio in 2015. Holly is also listed as specializing in internal medicine. Medicare claims data shows Holly provided 168 services to 70 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and aspiration of fluid from chest cavity using imaging guidance.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
- (210) 358-4000
- Email not available
Practice Locations
4502 MEDICAL DR
San Antonio, TX 78229
Conditions Commonly Evaluated or Treated
Within Hospital 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
Allergic Reactions
Blood Clots
Blood Disorders
Brain & nerves
Brain & Nerves
Breathing & lungs
Digestive health
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
Emergencies
Endocrine
General medical
- Hip fracture medical care
- Low sodium or electrolyte imbalance
- Post-surgery fever or infection
- Severe dehydration
- Short stature and growth concerns
Heart & Circulation
Heart & circulation
- Dangerous high blood pressure
- Deep vein thrombosis
- Heart failure flare-up
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Hormones & diabetes
Infections
- Bone infection
- Cellulitis
- Complicated Bladder Infection
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
- Severe COVID-19 illness
- Severe flu illness
Kidney & urinary
Liver & Digestive
Lung Infections
Lungs & Breathing
Nutrition
Procedures & services
Access & tubes
- Arterial catheter placement
- Central line placement
- Feeding or stomach tube insertion
- PICC line placement coordination
- Urinary catheter insertion
Addiction Medicine
Airway & Breathing
Breathing support
Critical Care
Diagnostic procedures
- Emergency ultrasound
- Hospital heart rhythm monitoring
- Lumbar puncture
- Swallowing safety evaluation coordination
Diagnostic Testing
Draining fluids
Emergency Care
Heart Procedures
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Fall risk assessment
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Medication management
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
Joint Procedures
Kidney Care
Lung Procedures
Medication & fluids
- Blood sugar insulin drip
- Blood thinner drip management
- Blood transfusion
- IV antibiotic treatment
- IV electrolyte replacement
- IV fluids
- Patient-Controlled Analgesia (PCA) Setup
Mental Health
Neurological Care
Nutrition Support
Rehabilitation
Urinary Care
Procedures Most Often Billed to Medicare
168 services · 70 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration of fluid from chest cavity using imaging guidance | Procedure | 32555 |
16 | Too few peers to compare |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
104 | As often as other peers in HOSPITALIST |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
35 | Less often than most peers in HOSPITALIST |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
13 | Less often than most peers in HOSPITALIST |
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 hospitalists at this location 4
Same specialty, same street address — most likely the same department or group.
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 hospitalists in San Antonio 4
Same specialty, same city.
More connections — 22 related providers in 3 groups
Trained at University of Texas Medical School at San Antonio 6
Other providers in the same specialty who trained at the same institution.
Class of 2015 at University of Texas Medical School at San Antonio 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration of fluid from chest cavity using imaging guidance 8
Providers in TX who bill this service to Medicare most often.
Common questions
What does Holly Day specialize in?
Holly Day is a hospitalist in San Antonio, TX. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Holly Day located?
Holly Day is listed at 4502 Medical Dr, San Antonio, TX 78229. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Holly Day's phone number?
The number on file is (210) 358-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Holly Day?
Holly Day's National Provider Identifier is 1235516329. 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 Holly Day train?
Holly Day attended University of Texas Medical School at San Antonio, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Holly Day have?
Holly Day has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Holly Day do most often?
According to Medicare billing data, Holly Day performs procedures including aspiration of fluid from chest cavity using imaging guidance, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Holly Day's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Holly Day. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.