Brian Fung, MD
NPI 1366974164 · Gastroenterology Physician · Mesa, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Fung, MD is a Gastroenterology Physician provider in Mesa, AZ (NPI 1366974164).
Provider details
- NPI number
- 1366974164
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 61850 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
537 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 105 | $121 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 91 | $158 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 78 | $232 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 73 | $45 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 70 | $77 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 171 | 167 |
| Pantoprazole Sodium | 138 | 69 |
| Omeprazole | 44 | 20 |
| Colesevelam Hcl | 35 | 16 |
| Nortriptyline Hcl | 27 | 12 |
| Linaclotidebrand: Linzess | 24 | 15 |
| Esomeprazole Magnesium | 13 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,251 across 112 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-03-30
- Last updated
- 2023-10-26
- Certified
- 2023-10-08
Frequently asked questions
- What is Brian Fung's NPI number?
- Brian Fung's National Provider Identifier (NPI) is 1366974164, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Fung's specialty?
- Brian Fung is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Fung located?
- Brian Fung's practice location on file with NPPES is 603 W Baseline Rd Ste 200, Mesa, AZ 85210-6051.
- What is Brian Fung's phone number?
- The practice phone number listed in the NPPES registry for Brian Fung is (480) 461-1088.
- Does Brian Fung accept Medicare?
- Brian Fung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Fung's NPI active?
- Yes — Brian Fung's NPI (1366974164) is active in the NPPES registry as of the last update on 2023-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.