Peter Simpson, MD, MPH
NPI 1043499478 · Gastroenterology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Simpson, MD, MPH is a Gastroenterology Physician provider in Mountain View, CA (NPI 1043499478).
Provider details
- NPI number
- 1043499478
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Male
- Sole proprietor
- No
- License
- A71224 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
663 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) |
|---|---|---|
| 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 | 181 | $6 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 131 | $282 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 90 | $156 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 69 | $63 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 41 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 81 | 79 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 54 | 54 |
| Pantoprazole Sodium | 52 | 18 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 47 | 47 |
| Omeprazole | 45 | 21 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 18 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$12 across 1 record (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
- 2007-11-02
- Last updated
- 2012-01-13
Frequently asked questions
- What is Peter Simpson's NPI number?
- Peter Simpson's National Provider Identifier (NPI) is 1043499478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Simpson's specialty?
- Peter Simpson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Simpson located?
- Peter Simpson's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Peter Simpson's phone number?
- The practice phone number listed in the NPPES registry for Peter Simpson is (650) 934-7575.
- Does Peter Simpson accept Medicare?
- Peter Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Simpson's NPI active?
- Yes — Peter Simpson's NPI (1043499478) is active in the NPPES registry as of the last update on 2012-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.