Physician Profile
Joo H. Hwang, MD
Unclaimed ProfileAbout Dr. Hwang
Joo H. Hwang, MD is a healthcare provider in Stanford, CA specializing in gastroenterology. Joo trained at University of Chicago, Pritzker School of Medicine, graduating in 1997. Medicare claims data shows Joo provided 256 services to 242 patients. The services billed most often include established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more, and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
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
- (650) 723-4000
- Email not available
Practice Locations
300 PASTEUR DR
Stanford, CA 94305
1804 Embarcadero Rd Ste 100
Palo Alto, CA 94303
1959 NE Pacific St Box 356424
Seattle, WA 98195
Conditions Commonly Evaluated or Treated
Within Gastroenterology 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
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
- Constipation
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
256 services · 242 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
40 | Less often than most peers in Gastroenterology |
| Incision of muscle of lower esophagus using an endoscope | Procedure | 43497 |
22 | Too few peers to compare |
| Other procedure on stomach | Procedure | 43999 |
15 | Too few peers to compare |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
13 | Less often than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
12 | Less often than most peers in Gastroenterology |
| Other procedure on abdomen | Procedure | 49999 |
11 | Too few peers to compare |
| Study of esophageal sensation by balloon distension | Treatment | 91040 |
16 | As often as other peers in Gastroenterology |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
59 | More often than most peers in Gastroenterology |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
45 | More often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
23 | Less often than most peers in Gastroenterology |
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 gastroenterologists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
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 — 30 related providers in 4 groups
Other gastroenterologists in Stanford 6
Same specialty, same city.
Trained at University of Chicago, Pritzker School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at University of Chicago, Pritzker School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Hwang's specialty?
Dr. Hwang is a gastroenterologist in Stanford, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Hwang?
Dr. Hwang is listed at 300 Pasteur Dr, Stanford, CA 94305. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Hwang?
The number on file is (650) 723-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Hwang?
Dr. Hwang's National Provider Identifier is 1194815043. 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
What is Dr. Hwang's medical education?
Dr. Hwang attended University of Chicago, Pritzker School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Hwang have?
Dr. Hwang has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Hwang known for?
According to Medicare billing data, Dr. Hwang performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, incision of muscle of lower esophagus using an endoscope and other procedure on stomach; provides treatments such as study of esophageal sensation by balloon distension, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Hwang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hwang. 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.