Dr. Robert J. Davidson, MD
- Medicare services, 2023
- 506
- Part D claims, 2024
- 14,248
- Hospital affiliations
- 3
- Industry payments
- $4,527
- Medical groups
- 2
- Practice address
- 900 North Washington Street, Du Quoin, IL 62832
- Practice phone
- Call (618) 542-2146
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Robert J. Davidson is a family medicine physician in Du Quoin, Illinois
Dr. Davidson practices at Marshall Browning Hospital in Du Quoin, Illinois, part of Marshall Browning Hospital.
Dr. Davidson's NPI, 1790774826, was assigned on October 20, 2005. Dr. Davidson graduated from State University of New York - State College Optometry in 1979. Dr. Davidson holds Illinois license 36-079086.
- NPI
- 1790774826NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244322097
- NPI enumeration date
- October 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (618) 542-2146
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert J. Davidson practices at Marshall Browning Hospital in Du Quoin, Illinois
Dr. Davidson's primary practice is Marshall Browning Hospital, at 900 North Washington Street, Du Quoin, IL 62832 in Perry County. The practice phone is (618) 542-2146.
- Marshall Browning Hospital900 North Washington Street, Du Quoin, IL 62832 · Perry CountyPhone(618) 542-2146
Source: Dmand AI Affiliation Data
Dr. Robert J. Davidson is affiliated with 9 sites of care and 2 medical groups
Dr. Davidson's primary practice is Marshall Browning Hospital in Du Quoin, Illinois, part of Marshall Browning Hospital. Dr. Davidson is also affiliated with Pinckneyville Community Hospital. The medical group on file is Marshall Browning Hospital. Dmand AI also links Dr. Davidson to 1 more hospital, 4 skilled nursing facilities, 1 group practice or clinic, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert J. Davidson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Davidson practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshall Browning Hospital | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Marshall Browning Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Robert J. Davidson is one of 5,105 family medicine physicians in Illinois
Family medicine is Dr. Davidson's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Davidson is licensed in Illinois.
Specialties and state licenses
- Family medicine, IllinoisPrimary
Family medicine physicians near Dr. Davidson
Counts of family medicine physicians 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. Robert J. Davidson billed Medicare for 506 services in 2023
CMS data shows 506 Medicare services from Dr. Davidson across 6 procedure codes in 2023. Medicare paid $30,925 for them.
Dr. Davidson's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 6322023: 38938%
- Other services
- 2022: 602023: 5410%
- Surgery
- 2022: 682023: 3943%
- Lab and pathology
- 2022: 192023: 2426%
Where Dr. Davidson's Medicare services took place, 2023
- In an office49498%
- In a facility122%
Dr. Davidson compared with the Illinois median for family medicine physicians, 2023
- Dr. Davidson
- Illinois median
- Medicare services
- 506vs 35642% above
- Part D claims
- 13,503vs 61821.8 times
Medians across 5,015 family medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Davidson's most billed Medicare procedure codes, 2023
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Davidson and other family medicine physicians in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert J. Davidson's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Davidson's median patient age at 80, with 59% women.
Dr. Davidson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women59%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Robert J. Davidson wrote 14,248 Medicare Part D claims in 2024
In 2024, Dr. Davidson wrote 14,248 Medicare Part D claims for 471 patients. 87% of them were for generic drugs. CMS names the drug for 13,503 of them, across 187 drugs with 11 or more claims each, at $664,152 in total drug cost. In 2023, CMS named 17,315 claims across 216 drugs.
Dr. Davidson's Part D claims by kind of drug, 2024
- Generic12,363 claims87%
- Brand-name1,855 claims13%
- Other30 claims0%
Dr. Davidson'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. Davidson's Part D claims, 2024
- Opioids3%468 of 14,248 claims
- Antibiotics4%515 of 14,248 claims
- Antipsychotics, patients 65 and over3%398 of 14,248 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: 17,3152024: 13,50322%
Drugs named by CMS: 187 in 2024, 216 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
How Dr. Robert J. Davidson takes part in Medicare
Dr. Davidson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert J. Davidson received $4,527 in industry payments from 2016 to 2025
CMS Open Payments shows 244 general payments to Dr. Davidson from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $828.
General payments to Dr. Davidson by program year, 2016 to 2025
Companies that paid Dr. Davidson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert J. Davidson graduated from State University of New York - State College Optometry
Dr. Davidson graduated from State University of New York - State College Optometry in 1979.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert J. Davidson'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 DataDmand AI Org Hierarchy 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 Data |
| 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) |
| 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. Robert J. Davidson
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. Robert J. Davidson's NPI number?
Dr. Robert J. Davidson's NPI number is 1790774826. It was assigned on October 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert J. Davidson?
Dr. Robert J. Davidson is a family medicine physician in Du Quoin, Illinois. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Robert J. Davidson practice?
Dr. Davidson practices at 900 North Washington Street, Du Quoin, IL 62832. Dr. Davidson's primary practice is Marshall Browning Hospital in Du Quoin, Illinois, part of Marshall Browning Hospital. Dmand AI also links Dr. Davidson to 1 hospital, 4 skilled nursing facilities, 1 group practice or clinic, 1 hospice and 1 medical group.
What is Dr. Robert J. Davidson's office phone number?
The practice phone on file for Dr. Davidson is (618) 542-2146.
What is Dr. Robert J. Davidson's medical license number?
Dr. Davidson holds Illinois license 36-079086.
Which hospitals is Dr. Robert J. Davidson affiliated with?
Dr. Davidson practices at Marshall Browning Hospital in Du Quoin, Illinois. Dr. Davidson is also affiliated with Pinckneyville Community Hospital. Dmand AI links Dr. Davidson to 1 more hospital.
What medical group is Dr. Robert J. Davidson part of?
Dr. Davidson is linked to Marshall Browning Hospital. Dmand AI links Dr. Davidson to 1 more medical group.
Does Dr. Robert J. Davidson accept Medicare?
Yes. CMS data shows Dr. Davidson billed Medicare for 506 services in 2023, and Dr. Davidson accepts Medicare assignment.
What services does Dr. Robert J. Davidson bill to Medicare?
In 2023, Dr. Davidson's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Robert J. Davidson go to medical school?
Dr. Davidson graduated from State University of New York - State College Optometry in 1979.
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What drugs does Dr. Robert J. Davidson prescribe most?
In 2024 Medicare Part D data, Dr. Davidson's most prescribed drugs by claims were Eliquis, Atorvastatin Calcium and Potassium Chloride.
Has Dr. Robert J. Davidson received payments from drug or device companies?
CMS Open Payments shows $4,527 in general payments to Dr. Davidson from 30 companies from 2016 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Robert J. Davidson been practicing?
Dr. Davidson graduated from medical school in 1979, 47 years ago.
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