Dr. Andrew Richard De Mar Jr., MD
- Medicare services, 2024
- 479
- Medicare patients, 2024
- 409
- Part D claims, 2024
- 44
- Hospital affiliations
- 3
- Industry payments
- $103
- Practice address
- One Medical Plaza, Roseville, CA 95661
- Practice phone
- Call (916) 781-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. De Mar's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Andrew Richard De Mar Jr. is a general surgeon in Roseville, California
Dr. De Mar practices at Sutter Roseville Medical Center in Roseville, California, part of Sutter Health.
Dr. De Mar's NPI, 1891716023, was assigned on July 22, 2006. Dr. De Mar graduated from Ohio State College of Medicine in 1985. Dr. De Mar holds California license G58869.
- NPI
- 1891716023NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951337633
- NPI enumeration date
- July 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 781-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Andrew Richard De Mar Jr. practices at 2 locations in Roseville, California
Dr. De Mar's primary practice is Sutter Roseville Medical Center, at One Medical Plaza, Roseville, CA 95661 in Placer County. The practice phone is (916) 781-1000. Dr. De Mar also practices at Sutter Roseville Medical Center, 1 Medical Plz, Roseville, CA 95661.
- Sutter Roseville Medical CenterPrimaryOne Medical Plaza, Roseville, CA 95661 · Placer CountyPhone(916) 781-1000
- Sutter Roseville Medical Center1 Medical Plz, Roseville, CA 95661 · Placer CountyPhone(800) 353-3369
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Andrew Richard De Mar Jr. is affiliated with 5 sites of care and 1 medical group
Dr. De Mar's primary practice is Sutter Roseville Medical Center in Roseville, California, part of Sutter Health. Dr. De Mar is also affiliated with Sutter Auburn Faith Hospital. The medical group on file is Trauma Medical Group of Roseville. Dmand AI also links Dr. De Mar to 1 more hospital, 1 physician office and 1 group practice or clinic, 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. Andrew Richard De Mar Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. De Mar practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sutter Roseville Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Andrew Richard De Mar Jr. is one of 2,926 general surgeons in California
Surgery is Dr. De Mar's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. De Mar is board certified in surgery by the American Board of Surgery. Dr. De Mar is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal adhesion surgery, abdominal hernia repair surgery, appendectomy, collapsed lung, colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal and groin hernia surgery among the conditions Dr. De Mar treats.
General surgeons near Dr. De Mar
Counts of general surgeons 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. Andrew Richard De Mar Jr. billed Medicare for 479 services in 2024
CMS data shows 479 Medicare services from Dr. De Mar across 7 procedure codes in 2024, for 409 Medicare patients. Medicare paid $50,640 for them.
Dr. De Mar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3412024: 45734%
- Surgery
- 2023: 162024: 2238%
Where Dr. De Mar's Medicare services took place, 2024
- In an office439%
- In a facility43691%
Dr. De Mar compared with the California median for general surgeons, 2024
- Dr. De Mar
- California median
- Medicare services
- 479vs 1662.9 times
- Medicare patients
- 409vs 1213.4 times
- Part D claims
- 19vs 3444% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. De Mar'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.
Need commercial claims for Dr. De Mar?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. De Mar and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew Richard De Mar Jr. treated 409 Medicare patients in 2024, average age 76
CMS counts 409 Medicare patients who saw Dr. De Mar in 2024. The largest group is 75 to 84, with 161 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 1.69, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. De Mar's median patient age at 56, with 50% women.
Dr. De Mar's Medicare patients by age, 2024
Dr. De Mar's Medicare patients by sex, 2024
- Women22455%
- Men18545%
Chronic conditions among Dr. De Mar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Chronic kidney disease40%
- Ischemic heart disease38%
- Atrial fibrillation37%
- Mood disorders36%
- Diabetes35%
Share of Medicare patients with each condition. A patient can have several.
Dr. De Mar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women50%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Andrew Richard De Mar Jr. wrote 44 Medicare Part D claims in 2024
In 2024, Dr. De Mar wrote 44 Medicare Part D claims for 32 patients. 98% of them were for generic drugs. CMS names the drug for 19 of them, across 1 drug with 11 or more claims each, at $100 in total drug cost. In 2023, CMS named 14 claims across 1 drug.
Dr. De Mar's Part D claims by kind of drug, 2024
- Generic43 claims98%
- Brand-name and other1 claims2%
Dr. De Mar'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. De Mar's Part D claims, 2024
- Opioids55%24 of 44 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: 142024: 1936%
Drugs named by CMS: 1 in 2024, 1 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. Andrew Richard De Mar Jr. ranks in the 42nd percentile for colonoscopy in Medicare
Dr. De Mar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 12 procedures of colonoscopy by Dr. De Mar, more than 42% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. De Mar ranks in Medicare procedure volume
- Colonoscopy
- 42nd percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Andrew Richard De Mar Jr. received $103 in industry payments from 2016 to 2025
CMS Open Payments shows 5 general payments to Dr. De Mar from 4 drug and device companies from 2016 to 2025. Education make up the largest share, 54% of the total. Ethicon Inc. paid the most, $56.
General payments to Dr. De Mar by program year, 2016 to 2025
General payments to Dr. De Mar by kind, 2016 to 2025
- Education$5654%
- Food and beverage$4746%
Companies that paid Dr. De Mar 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. Andrew Richard De Mar Jr. has 1 award and honors on record
Dmand AI lists 1 award for Dr. De Mar.
Awards and honors for Dr. De Mar
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Andrew Richard De Mar Jr. graduated from Ohio State College of Medicine
Dr. De Mar graduated from Ohio State College of Medicine in 1985. Dr. De Mar is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Andrew Richard De Mar Jr. accepts plans from 14 insurance carriers
Dr. De Mar is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. De Mar accepts, by number of carriers
- PPO9
- Medicare8
- HMO6
- EPO4
- POS4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Andrew Richard De Mar Jr.'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice 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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Andrew Richard De Mar Jr.
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. Andrew Richard De Mar Jr.'s NPI number?
Dr. Andrew Richard De Mar Jr.'s NPI number is 1891716023. It was assigned on July 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew Richard De Mar Jr.?
Dr. Andrew Richard De Mar Jr. is a general surgeon in Roseville, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Andrew Richard De Mar Jr. practice?
Dr. De Mar practices at One Medical Plaza, Roseville, CA 95661. Dr. De Mar also practices at 1 Medical Plz, Roseville, CA 95661. Dr. De Mar's primary practice is Sutter Roseville Medical Center in Roseville, California, part of Sutter Health. Dmand AI also links Dr. De Mar to 1 hospital, 1 physician office and 1 group practice or clinic.
What is Dr. Andrew Richard De Mar Jr.'s office phone number?
The practice phone on file for Dr. De Mar is (916) 781-1000.
What is Dr. Andrew Richard De Mar Jr.'s medical license number?
Dr. De Mar holds California license G58869.
Which hospitals is Dr. Andrew Richard De Mar Jr. affiliated with?
Dr. De Mar practices at Sutter Roseville Medical Center in Roseville, California. Dr. De Mar is also affiliated with Sutter Auburn Faith Hospital. Dmand AI links Dr. De Mar to 1 more hospital.
What medical group is Dr. Andrew Richard De Mar Jr. part of?
Dr. De Mar is linked to Trauma Medical Group of Roseville.
Does Dr. Andrew Richard De Mar Jr. accept Medicare?
Yes. CMS data shows Dr. De Mar billed Medicare for 479 services in 2024, and Dr. De Mar accepts Medicare assignment.
How many Medicare patients does Dr. Andrew Richard De Mar Jr. see?
CMS counts 409 Medicare patients who saw Dr. De Mar in 2024, with an average age of 76.
Is Dr. Andrew Richard De Mar Jr. board certified?
Yes. Dr. De Mar is board certified in surgery by the American Board of Surgery.
Show 6 more questionsShow fewer questions
What services does Dr. Andrew Richard De Mar Jr. bill to Medicare?
In 2024, Dr. De Mar's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and hospital inpatient care (99223).
Where did Dr. Andrew Richard De Mar Jr. go to medical school?
Dr. De Mar graduated from Ohio State College of Medicine in 1985.
What drugs does Dr. Andrew Richard De Mar Jr. prescribe most?
In 2024 Medicare Part D data, Dr. De Mar's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Andrew Richard De Mar Jr. received payments from drug or device companies?
CMS Open Payments shows $103 in general payments to Dr. De Mar from 4 companies from 2016 to 2025. The largest total came from Ethicon Inc.
How long has Dr. Andrew Richard De Mar Jr. been practicing?
Dr. De Mar graduated from medical school in 1985, 41 years ago.
What insurance does Dr. Andrew Richard De Mar Jr. accept?
Dr. De Mar is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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