Dr. James Florencio Dec Tamesis, MD
- Medicare services, 2024
- 560
- Medicare patients, 2024
- 195
- Part D claims, 2024
- 8,514
- Hospital affiliations
- 3
- Industry payments
- $197
- Practice address
- 2050 Blue Oaks Blvd, Roseville, CA 95747
- Practice phone
- Call (800) 470-0071
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sutter Valley Medical Foundation
Roseville, California
Find Dr. Tamesis' 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. James Florencio Dec Tamesis is an internist in Roseville, California
Dr. Tamesis practices at Sutter Valley Medical Foundation in Roseville, California.
Dr. Tamesis' NPI, 1568819050, was assigned on May 16, 2016. Dr. Tamesis graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2013. Dr. Tamesis holds California license A172259.
- NPI
- 1568819050NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668708942
- NPI enumeration date
- May 16, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (800) 470-0071
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Florencio Dec Tamesis practices at Sutter Valley Medical Foundation in Roseville, California
Dr. Tamesis' primary practice is Sutter Valley Medical Foundation, at 2050 Blue Oaks Blvd, Roseville, CA 95747 in Placer County. The practice phone is (800) 470-0071.
- Sutter Valley Medical Foundation2050 Blue Oaks Blvd, Roseville, CA 95747 · Placer CountyPhone(800) 470-0071
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James Florencio Dec Tamesis is affiliated with 6 sites of care and 1 medical group
Dr. Tamesis' primary practice is Sutter Valley Medical Foundation in Roseville, California. Dr. Tamesis is also affiliated with Sutter Roseville Medical Center. The medical group on file is SGMF Radiology. Dmand AI also links Dr. Tamesis to 2 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Florencio Dec Tamesis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tamesis practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sutter Valley Medical Foundation | 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. James Florencio Dec Tamesis is one of 16,751 internists in California
Internal medicine is Dr. Tamesis' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tamesis is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Tamesis' licenses on file in 2 states: California and Ohio.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Ohio license
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute sinusitis, acute skin infection, ADHD, aneurysm, anxiety and arthritis among the conditions Dr. Tamesis treats.
Internists near Dr. Tamesis
Counts of internists 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. James Florencio Dec Tamesis billed Medicare for 560 services in 2024
CMS data shows 560 Medicare services from Dr. Tamesis across 9 procedure codes in 2024, for 195 Medicare patients. Medicare paid $40,656 for them. Every service was in an office.
Dr. Tamesis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3252024: 3037%
- Other services
- 2023: 1242024: 20465%
- Tests and treatments
- 2023: 362024: 5347%
Dr. Tamesis compared with the California median for internists, 2024
- Dr. Tamesis
- California median
- Medicare services
- 560vs 36155% above
- Medicare patients
- 195vs 15129% above
- Part D claims
- 7,649vs 42118.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Tamesis' 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tamesis and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Florencio Dec Tamesis treated 195 Medicare patients in 2024, average age 76
CMS counts 195 Medicare patients who saw Dr. Tamesis in 2024. The largest group is 65 to 74, with 84 patients. 61% of them have high cholesterol, and 59% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tamesis' median patient age at 68, with 55% women.
Dr. Tamesis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tamesis' Medicare patients by sex, 2024
- Women11458%
- Men8142%
Chronic conditions among Dr. Tamesis' Medicare patients, 2024
- High cholesterol61%
- High blood pressure59%
- Arthritis53%
- Chronic kidney disease26%
- Diabetes25%
- Anxiety23%
- Ischemic heart disease22%
- Atrial fibrillation21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tamesis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Florencio Dec Tamesis wrote 8,514 Medicare Part D claims in 2024
In 2024, Dr. Tamesis wrote 8,514 Medicare Part D claims for 599 patients. 87% of them were for generic drugs. CMS names the drug for 7,649 of them, across 141 drugs with 11 or more claims each, at $780,731 in total drug cost. In 2023, CMS named 5,904 claims across 123 drugs.
Dr. Tamesis' Part D claims by kind of drug, 2024
- Generic7,430 claims87%
- Brand-name1,032 claims12%
- Other52 claims1%
Dr. Tamesis' 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. Tamesis' Part D claims, 2024
- Opioids5%468 of 8,514 claims
- Antibiotics2%201 of 8,514 claims
- Antipsychotics, patients 65 and over1%95 of 8,514 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: 5,9042024: 7,64930%
Drugs named by CMS: 141 in 2024, 123 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. James Florencio Dec Tamesis offers telehealth to Medicare patients
Dr. Tamesis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Tamesis as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 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. James Florencio Dec Tamesis received $197 in industry payments from 2016 to 2019
CMS Open Payments shows 16 general payments to Dr. Tamesis from 8 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $97.
General payments to Dr. Tamesis by program year, 2016 to 2019
Companies that paid Dr. Tamesis the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Florencio Dec Tamesis graduated from Far Eastern University Nicanor Reyes Medical Foundation
Dr. Tamesis graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2013.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. James Florencio Dec Tamesis accepts plans from 13 insurance carriers
Dr. Tamesis is in network with 13 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- CareSource
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Tamesis accepts, by number of carriers
- PPO8
- HMO6
- Medicare6
- EPO4
- POS3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. James Florencio Dec Tamesis'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. James Florencio Dec Tamesis
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. James Florencio Dec Tamesis' NPI number?
Dr. James Florencio Dec Tamesis' NPI number is 1568819050. It was assigned on May 16, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. James Florencio Dec Tamesis?
Dr. James Florencio Dec Tamesis is an internist in Roseville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Florencio Dec Tamesis practice?
Dr. Tamesis practices at 2050 Blue Oaks Blvd, Roseville, CA 95747. Dr. Tamesis' primary practice is Sutter Valley Medical Foundation in Roseville, California. Dmand AI also links Dr. Tamesis to 2 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. James Florencio Dec Tamesis' office phone number?
The practice phone on file for Dr. Tamesis is (800) 470-0071.
What is Dr. James Florencio Dec Tamesis' medical license number?
Dr. Tamesis holds California license A172259, one of the licenses on file in 2 states.
Which states has Dr. James Florencio Dec Tamesis been licensed in?
Dmand AI has state licenses on file for Dr. Tamesis in California (2021 to 2027) and Ohio (2016 to 2021).
Which hospitals is Dr. James Florencio Dec Tamesis affiliated with?
Dr. Tamesis is affiliated with Sutter Roseville Medical Center. Dmand AI links Dr. Tamesis to 2 more hospitals.
What medical group is Dr. James Florencio Dec Tamesis part of?
Dr. Tamesis is linked to SGMF Radiology.
Does Dr. James Florencio Dec Tamesis accept Medicare?
Yes. CMS data shows Dr. Tamesis billed Medicare for 560 services in 2024, and Dr. Tamesis accepts Medicare assignment.
Does Dr. James Florencio Dec Tamesis offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tamesis as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. James Florencio Dec Tamesis see?
CMS counts 195 Medicare patients who saw Dr. Tamesis in 2024, with an average age of 76.
Is Dr. James Florencio Dec Tamesis board certified?
Yes. Dr. Tamesis is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. James Florencio Dec Tamesis bill to Medicare?
In 2024, Dr. Tamesis' most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. James Florencio Dec Tamesis go to medical school?
Dr. Tamesis graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2013.
What drugs does Dr. James Florencio Dec Tamesis prescribe most?
In 2024 Medicare Part D data, Dr. Tamesis' most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
Has Dr. James Florencio Dec Tamesis received payments from drug or device companies?
CMS Open Payments shows $197 in general payments to Dr. Tamesis from 8 companies from 2016 to 2019. The largest total came from Allergan Inc.
How long has Dr. James Florencio Dec Tamesis been practicing?
Dr. Tamesis graduated from medical school in 2013, 13 years ago.
What insurance does Dr. James Florencio Dec Tamesis accept?
Dr. Tamesis is in network with 13 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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