Davis L. Sim, MD PHD
Gastroenterology Physician · Springfield, OR
Davis L. Sim, MD PHD is a gastroenterology physician with a practice address in Springfield, Oregon, and NPI 1265668263, issued on Jun 4, 2009. Check the license (Oregon MD172163, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Davis L. Sim
- Credential
- MD PHD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD172163 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3355 Riverbend Dr 500, Springfield, OR 97477
- Phone
- (541) 868-9506
- Enumerated
- Jun 4, 2009
- Record last updated
- May 18, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (541) 685-5920
- Medicare enrollment
- Enrolled (PECOS I20150819008089); accepts Medicare assignment
- Medical or professional school
- University Of Virginia School Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 281 in Oregon → Look up another NPI →
Verify Davis L. Sim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD172163Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% more Medicare Part D claims than the average gastroenterology physician in 2024
1,249 Medicare Part D claims for 613 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Peg 3350-Electrolyte297 claims
- Omeprazole107 claims
- Sod Sulf-Potass Sulf-Mag Sulf89 claims
- Pantoprazole Sodium57 claims
- Azathioprine56 claims
- Sutab44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $268.19
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Eugene Gastroenterology Consultants PCSpringfield, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Davis L. Sim among 281 gastroenterology physician records in Oregon
Davis L. Sim, MD PHD is one of 281 gastroenterology physician records with a practice address in Oregon. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 73% of them.
- NPI issued2009 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2009 · median 2003 among the 201 with a school on file
- Record last updated2018 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Oregon
There are 281 gastroenterology physician records in Oregon.
All 281 in Oregon → Every provider in Springfield → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Craig Chamberlain, MDSpringfield, OR 974771598784928
- Ryan De Lee, MDSpringfield, OR 974771104920693
- Paul Evans, M.D.Springfield, OR 974771962480871
- Jonathan Gonenne, MDSpringfield, OR 974771649299538
- Peter Grubel, MDSpringfield, OR 974771376531335
- Peter Kay, MDSpringfield, OR 974771710906177
- Gregory Knecht, MDSpringfield, OR 974771598785578
- Christianne Kratka, MDSpringfield, OR 974771851310130
Common questions
What is Davis L. Sim, MD PHD's NPI number?
Davis L. Sim, MD PHD's National Provider Identifier (NPI) is 1265668263, issued on Jun 4, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Davis L. Sim, MD PHD located?
The NPPES record lists a practice address at 3355 Riverbend Dr 500, Springfield, OR, 97477. Phone: (541) 868-9506. Providers update this record themselves, so call before visiting.
How can I verify Davis L. Sim, MD PHD's license?
NPPES lists Oregon license number MD172163, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Davis L. Sim, MD PHD prescribe under Medicare Part D?
In 2024, Davis L. Sim, MD PHD had 1,249 Medicare Part D claims for 613 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.