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Edit this profileAt a glance
- 1959 Ne Pacific St, Box 356421, Seattle, WA 98195
About Dr. Mayo
Listed in the NPI registry as a hospitalist, Mark STEPHEN KING Mayo, MD practices in Seattle, WA. Mark graduated from Perelman School of Med at the University of Pennsylvania in 2015. Mark is also listed as specializing in internal medicine. Medicare claims data shows Mark provided 105 services to 68 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, and hospital discharge day management, more than 30 minutes. NPI 1598152639 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
- (206) 543-3605
- Email not available
Practice Locations
1959 NE PACIFIC ST BOX 356421
Seattle, WA 98195
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
Brain & nerves
Breathing & lungs
Digestive health
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
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
- Heart failure flare-up
- Dangerous high blood pressure
- Deep vein thrombosis
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Infections
- Complicated Bladder Infection
- Severe COVID-19 illness
- Severe flu illness
- Bone infection
- Cellulitis
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
Liver & Digestive
Lung Infections
Nutrition
Allergic Reactions
Blood Clots
Blood Disorders
Brain & Nerves
Emergencies
Hormones & diabetes
Kidney & urinary
Lungs & Breathing
Procedures & services
Access & tubes
- Feeding or stomach tube insertion
- Urinary catheter insertion
- Arterial catheter placement
- Central line placement
- PICC line placement coordination
Addiction Medicine
Breathing support
Critical Care
Diagnostic procedures
- Hospital heart rhythm monitoring
- Swallowing safety evaluation coordination
- Emergency ultrasound
- Lumbar puncture
Emergency Care
Heart Procedures
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
- Fall risk assessment
- Medication management
Kidney Care
Medication & fluids
- Blood thinner drip management
- IV antibiotic treatment
- IV electrolyte replacement
- Patient-Controlled Analgesia (PCA) Setup
- Blood sugar insulin drip
- Blood transfusion
- IV fluids
Mental Health
Neurological Care
Rehabilitation
Urinary Care
Airway & Breathing
Diagnostic Testing
Draining fluids
Joint Procedures
Lung Procedures
Nutrition Support
Procedures Most Often Billed to Medicare
105 services · 68 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
56 | Less often than most peers in Hospitalist |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
21 | Less often than most peers in Hospitalist |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
17 | Less often than most peers in Hospitalist |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
11 | 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 3
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 Seattle 5
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Perelman School of Med at the University of Pennsylvania 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Perelman School of Med at the University of Pennsylvania 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Mayo specialize in?
Dr. Mayo is a hospitalist in Seattle, WA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Mayo located?
Dr. Mayo is listed at 1959 Ne Pacific St Box 356421, Seattle, WA 98195. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Mayo's phone number?
The number on file is (206) 543-3605. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Mayo?
Dr. Mayo's National Provider Identifier is 1598152639. 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. Mayo go to medical school?
Dr. Mayo attended Perelman School of Med at the University of Pennsylvania, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mayo have?
Dr. Mayo has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Mayo do most often?
According to Medicare billing data, Dr. Mayo the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mayo's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mayo. If this is you, claiming it is free.
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