Sian Chisholm, M.D.
NPI 1346392800 · Gastroenterology Physician · Fleming Island, FL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sian Chisholm, M.D. is a Gastroenterology Physician provider in Fleming Island, FL (NPI 1346392800).
Provider details
- NPI number
- 1346392800
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- ME99207 (FL)
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
844 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 | 139 | $124 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 138 | $116 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 102 | $115 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 91 | $89 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 78 | $70 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 301 | 103 |
| Omeprazole | 68 | 21 |
| Famotidine | 54 | 27 |
| Linaclotidebrand: Linzess | 49 | 14 |
| Lubiprostone | 45 | — |
| Lipase/Protease/Amylasebrand: Creon | 35 | — |
| Sucralfate | 22 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$35 across 2 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
- 2007-01-17
- Last updated
- 2026-06-04
- Certified
- 2026-06-04
Frequently asked questions
- What is Sian Chisholm's NPI number?
- Sian Chisholm's National Provider Identifier (NPI) is 1346392800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sian Chisholm's specialty?
- Sian Chisholm is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Sian Chisholm located?
- Sian Chisholm's practice location on file with NPPES is 1681 Eagle Harbor Pkwy, Fleming Island, FL 32003-4819.
- What is Sian Chisholm's phone number?
- The practice phone number listed in the NPPES registry for Sian Chisholm is (904) 214-8100.
- Does Sian Chisholm accept Medicare?
- Sian Chisholm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sian Chisholm's NPI active?
- Yes — Sian Chisholm's NPI (1346392800) is active in the NPPES registry as of the last update on 2026-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.