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Dr. Davis L. Sim, MD, PhD
NPI1265668263PAC ID6305158056
- Medicare services, 2024
- 788
- Medicare patients, 2024
- 312
- Part D claims, 2024
- 1,249
- Publications
- 4
- Hospital affiliations
- 4
- Practice address
- 3355 Riverbend Dr, Springfield, OR 97477
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Day Surgery at Riverbend - HOPD
Acute Care Hospital outpatient department · Springfield, Oregon
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Dr. Davis L. Sim is a gastroenterologist in Springfield, Oregon
Dr. Sim practices at Day Surgery at Riverbend - HOPD in Springfield, Oregon.
Dr. Sim's NPI, 1265668263, was assigned on June 4, 2009. Dr. Sim graduated from University of Virginia School of Medicine in 2009. Dr. Sim holds Oregon license MD172163.
NPI and contact details
- NPI
- 1265668263NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305158056
- NPI enumeration date
- June 4, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Davis L. Sim practices at Day Surgery at Riverbend - HOPD in Springfield, Oregon
Dr. Sim's primary practice is Day Surgery at Riverbend - HOPD, at 3355 Riverbend Dr, Springfield, OR 97477.
- Day Surgery at Riverbend - HOPD3355 Riverbend Dr, Springfield, OR 97477
Source: Dmand AI Affiliation Data
Dr. Davis L. Sim is affiliated with 6 sites of care and 1 medical group
Dr. Sim's primary practice is Day Surgery at Riverbend - HOPD in Springfield, Oregon. Dr. Sim is also affiliated with PeaceHealth Sacred Heart Medical Center RiverBend. The medical group on file is Eugene Gastroenterology Consultants. Dmand AI also links Dr. Sim to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Day Surgery at Riverbend - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Davis L. Sim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sim practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Day Surgery at Riverbend - HOPD | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Davis L. Sim is one of 226 gastroenterologists in Oregon
Gastroenterology is Dr. Sim's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Sim is licensed in Oregon.
Specialties and state licenses
- Gastroenterology, OregonPrimary
Gastroenterologists near Dr. Sim
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Davis L. Sim billed Medicare for 788 services in 2024
CMS data shows 788 Medicare services from Dr. Sim across 13 procedure codes in 2024, for 312 Medicare patients. Medicare paid $50,539 for them.
Medicare services, 2024788
Medicare patients312
Paid by Medicare$50,539
Procedure codes13
Dr. Sim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 2982024: 26212%
- Surgery
- 2023: 2492024: 2432%
- Office and hospital visits
- 2023: 1282024: 14816%
- Other services
- 2023: 1362024: 11813%
- Tests and treatments
- 2023: 02024: 17
Where Dr. Sim's Medicare services took place, 2024
- In an office48261%
- In a facility30639%
Dr. Sim compared with the Oregon median for gastroenterologists, 2024
- Dr. Sim
- Oregon median
- Medicare services
- 788vs 2732.9 times
- Medicare patients
- 312vs 19064% above
- Part D claims
- 1,039vs 3403.1 times
Medians across 224 gastroenterologists in Oregon with Dmand AI profiles that report each measure.
Dr. Sim's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Davis L. Sim treated 312 Medicare patients in 2024, average age 71
CMS counts 312 Medicare patients who saw Dr. Sim in 2024. The largest group is 65 to 74, with 186 patients. 66% of them have high cholesterol, and 64% have high blood pressure. 18% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sim's median patient age at 62, with 59% women.
Medicare patients, 2024312
Average age71
Average risk score1.03
Also on Medicaid18%
Dr. Sim's Medicare patients by age, 2024
Dr. Sim's Medicare patients by sex, 2024
- Women18459%
- Men12841%
Chronic conditions among Dr. Sim's Medicare patients, 2024
- High cholesterol66%
- High blood pressure64%
- Arthritis48%
- Mood disorders25%
- Diabetes24%
- Depression23%
- Anxiety20%
- Osteoporosis18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Davis L. Sim wrote 1,249 Medicare Part D claims in 2024
In 2024, Dr. Sim wrote 1,249 Medicare Part D claims for 613 patients. 71% of them were for generic drugs. CMS names the drug for 1,039 of them, across 28 drugs with 11 or more claims each, at $1,447,617 in total drug cost. In 2023, CMS named 936 claims across 25 drugs.
Part D claims, 20241,249
Drugs named by CMS28
Total drug cost$1.4M
Part D patients613
Dr. Sim's Part D claims by kind of drug, 2024
- Generic891 claims71%
- Brand-name358 claims29%
Dr. Sim's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Sim's Part D claims, 2024
- Antibiotics2%26 of 1,249 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9362024: 1,03911%
Drugs named by CMS: 28 in 2024, 25 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Davis L. Sim ranks in the 69th percentile for colonoscopy in Medicare
Dr. Sim accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sim as offering telehealth. CMS counts 63 procedures of colonoscopy by Dr. Sim, more than 69% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Sim ranks in Medicare procedure volume
- Colonoscopy
- 69th percentile63 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 67th percentile63 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Davis L. Sim has 4 publications on record
Dmand AI links 4 papers to Dr. Sim, published from 2011 to 2018. 2011 was the busiest year, with 2. Dr. Sim's most frequent co-authors are Laren Seth Becker, MD, PhD, Tohru Sato, MD and Roy Muljadi Soetikno, MD.
Papers4
Years published2011 to 2018
Dr. Sim's papers by year, 2011 to 2018
Dr. Sim's most frequent co-authors
- Laren Seth Becker, MD, PhD1 shared paper
- Tohru Sato, MD1 shared paper
- Roy Muljadi Soetikno, MD1 shared paper
Recent publications by Dr. Sim
See who Dr. Sim researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sim works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Davis L. Sim received $686 in industry payments from 2017 to 2025
CMS Open Payments shows 14 general payments to Dr. Sim from 8 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $194.
General payments to Dr. Sim by program year, 2017 to 2025
Companies that paid Dr. Sim the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Davis L. Sim graduated from University of Virginia School of Medicine
Dr. Sim graduated from University of Virginia School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Davis L. Sim's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Davis L. Sim
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Davis L. Sim's NPI number?
Dr. Davis L. Sim's NPI number is 1265668263. It was assigned on June 4, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Davis L. Sim?
Dr. Davis L. Sim is a gastroenterologist in Springfield, Oregon. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Davis L. Sim practice?
Dr. Sim practices at 3355 Riverbend Dr, Springfield, OR 97477. Dr. Sim's primary practice is Day Surgery at Riverbend - HOPD in Springfield, Oregon. Dmand AI also links Dr. Sim to 3 hospitals and 1 group practice or clinic.
What is Dr. Davis L. Sim's medical license number?
Dr. Sim holds Oregon license MD172163.
Which hospitals is Dr. Davis L. Sim affiliated with?
Dr. Sim is affiliated with PeaceHealth Sacred Heart Medical Center RiverBend. Dmand AI links Dr. Sim to 3 more hospitals.
What medical group is Dr. Davis L. Sim part of?
Dr. Sim is linked to Eugene Gastroenterology Consultants.
Does Dr. Davis L. Sim accept Medicare?
Yes. CMS data shows Dr. Sim billed Medicare for 788 services in 2024, and Dr. Sim accepts Medicare assignment.
Does Dr. Davis L. Sim offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sim as offering telehealth services.
How many Medicare patients does Dr. Davis L. Sim see?
CMS counts 312 Medicare patients who saw Dr. Sim in 2024, with an average age of 71.
What services does Dr. Davis L. Sim bill to Medicare?
In 2024, Dr. Sim's most billed Medicare services were lab and pathology test (88305), surgery: digestive system (45380) and surgery: digestive system (45385).
Show 6 more questionsShow fewer questions
Where did Dr. Davis L. Sim go to medical school?
Dr. Sim graduated from University of Virginia School of Medicine in 2009.
What drugs does Dr. Davis L. Sim prescribe most?
In 2024 Medicare Part D data, Dr. Sim's most prescribed drugs by claims were Peg 3350-Electrolyte, Omeprazole and Sod Sulf-Potass Sulf-Mag Sulf.
Has Dr. Davis L. Sim received payments from drug or device companies?
CMS Open Payments shows $686 in general payments to Dr. Sim from 8 companies from 2017 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Davis L. Sim been practicing?
Dr. Sim graduated from medical school in 2009, 17 years ago.
Does Dr. Davis L. Sim do research?
Dmand AI links 4 publications to Dr. Sim, published from 2011 to 2018.
Who does Dr. Davis L. Sim publish with?
Dr. Sim's most frequent co-authors are Laren Seth Becker, MD, PhD (1 shared paper), Tohru Sato, MD (1 shared paper) and Roy Muljadi Soetikno, MD (1 shared paper).
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