Roger Kao, M.D.
NPI 1982786133 · Gastroenterology Physician · San Carlos, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roger Kao, M.D. is a Gastroenterology Physician provider in San Carlos, CA (NPI 1982786133).
Provider details
- NPI number
- 1982786133
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A98824 (CA)
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
19 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
719 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 181 | $222 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 148 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 61 | $162 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 50 | $153 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 50 | $298 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 192 | 75 |
| Omeprazole | 131 | 44 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 83 | 83 |
| Famotidine | 75 | 26 |
| Linaclotidebrand: Linzess | 57 | 26 |
| Lipase/Protease/Amylasebrand: Creon | 50 | 11 |
| Dexlansoprazolebrand: Dexlansoprazole Dr |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,781 across 134 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
- 2006-10-19
- Last updated
- 2020-03-19
- Certified
- 2020-03-19
Frequently asked questions
- What is Roger Kao's NPI number?
- Roger Kao's National Provider Identifier (NPI) is 1982786133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roger Kao's specialty?
- Roger Kao is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Roger Kao located?
- Roger Kao's practice location on file with NPPES is 1000 Laurel St, San Carlos, CA 94070-3939.
- What is Roger Kao's phone number?
- The practice phone number listed in the NPPES registry for Roger Kao is (650) 596-8800.
- Does Roger Kao accept Medicare?
- Roger Kao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roger Kao's NPI active?
- Yes — Roger Kao's NPI (1982786133) is active in the NPPES registry as of the last update on 2020-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.