Doctor profile · Federal record
Dr. Howard Masuoka, MD
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Gastroenterology Physician · Transplant Hepatology Physician · Transplant Hepatology Physician · Stanford, CA
- NPI 1770630162
- Accepts Medicare
- 23 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
550 University Blvd
Indianapolis, IN 462025149
(317) 274-4377
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- February 6, 2025
- Year of graduation
- 2003 — 23 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- California #C184254 · Indiana #01069938A
- Medicaid (2)
- IN #201029030 · MN #440002000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1770630162. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
324
Distinct HCPCS
10
Medicare allowed
$34,001
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 78 | 71 | $89 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 42 | 39 | $124 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 42 | 19 | $82 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 30 | 30 | $183 | |
91200 |
Measurement of liver stiffness | 23 | 23 | $12 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 21 | 19 | $165 | |
Q3014 |
Telehealth originating site facility fee | 20 | 18 | $28 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 19 | 19 | $62 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 13 | 12 | $92 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 13 | 12 | $198 |
In context: peer comparison
Among 18 peers in Stanford Gastroenterology Physician, average services per provider: 46. This provider delivers 7.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
521
Patients
96
Total drug cost
$317,437
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Furosemide | Generic | 93 | 29 | $480 |
| Xifaxan (Rifaximin) | Brand | 77 | 14 | $254,268 |
| Spironolactone | Generic | 75 | 24 | $1,157 |
| Ursodiol | Generic | 53 | 16 | $15,254 |
| Lactulose | Generic | 39 | 13 | $2,882 |
| Azathioprine | Generic | 31 | 0 | $2,364 |
| Carvedilol | Generic | 27 | 0 | $165 |
| Lubiprostone | Generic | 25 | 0 | $9,270 |
| Topiramate | Generic | 21 | 0 | $275 |
| Ondansetron Odt (Ondansetron) | Brand | 14 | 0 | $956 |
Hospital affiliations
Frequently asked questions
What is Dr. Howard Masuoka's medical specialty?
Dr. Howard Masuoka practices Gastroenterology Physician in Stanford, CA.
Where does Dr. Howard Masuoka practice?
Dr. Howard Masuoka practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Howard Masuoka's NPI?
Dr. Howard Masuoka's National Provider Identifier (NPI) is 1770630162, issued by NPPES.
Does Dr. Howard Masuoka accept Medicare assignment?
Yes. Dr. Howard Masuoka accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Howard Masuoka commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.