Dr. Clifford John Sewell, MD
- Medicare services, 2024
- 463
- Medicare patients, 2024
- 163
- Part D claims, 2024
- 3,806
- Hospital affiliations
- 4
- Industry payments
- $1,034
- Practice address
- 400 El Cerro Blvd Ste 102, Danville, CA 94526-1731
- Practice phone
- Call (925) 855-3780
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Claret Medical
Physician office · Danville, California
Find Dr. Sewell'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. Clifford John Sewell is an internist in Danville, California
Dr. Sewell practices at Claret Medical in Danville, California.
Dr. Sewell's NPI, 1851437123, was assigned on January 30, 2007. Dr. Sewell graduated from VCU School of Medicine in 1994. Dr. Sewell holds California license A55442.
- NPI
- 1851437123NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002037967
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 855-3780
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Clifford John Sewell practices at Claret Medical in Danville, California
Dr. Sewell's primary practice is Claret Medical, at 400 El Cerro Blvd Ste 102, Danville, CA 94526-1731. The practice phone is (925) 855-3780.
- Claret Medical400 El Cerro Blvd Ste 102, Danville, CA 94526-1731Phone(925) 855-3780
Source: Dmand AI Affiliation Data
Dr. Clifford John Sewell is affiliated with 8 sites of care
Dr. Sewell's primary practice is Claret Medical in Danville, California. Dr. Sewell is also affiliated with John Muir Medical Center, Walnut Creek. Dmand AI also links Dr. Sewell to 3 more hospitals and 3 home health agencies, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Clifford John Sewell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sewell practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Claret Medical | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Clifford John Sewell is one of 16,751 internists in California
Internal medicine is Dr. Sewell's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Sewell is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute sinusitis, acute skin infection, adjustment disease, ankle or foot injury, anxiety, arteritis and arthritis among the conditions Dr. Sewell treats.
Internists near Dr. Sewell
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. Clifford John Sewell billed Medicare for 463 services in 2024
CMS data shows 463 Medicare services from Dr. Sewell across 3 procedure codes in 2024, all of them office visits, for 163 Medicare patients. Medicare paid $27,208 for them. Every service was in an office.
Dr. Sewell's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4712024: 4632%
Dr. Sewell compared with the California median for internists, 2024
- Dr. Sewell
- California median
- Medicare services
- 463vs 36128% above
- Medicare patients
- 163vs 1518% above
- Part D claims
- 3,011vs 4217.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Sewell'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. Sewell?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Sewell and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Clifford John Sewell treated 163 Medicare patients in 2024, average age 80
CMS counts 163 Medicare patients who saw Dr. Sewell in 2024. The largest group is 75 to 84, with 75 patients. 69% of them have high blood pressure, and 66% have high cholesterol. Their average risk score is 1.26, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sewell's median patient age at 77, with 46% women.
Dr. Sewell's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Sewell's Medicare patients by sex, 2024
- Women7747%
- Men8653%
Chronic conditions among Dr. Sewell's Medicare patients, 2024
- High blood pressure69%
- High cholesterol66%
- Arthritis57%
- Ischemic heart disease28%
- Atrial fibrillation27%
- Chronic kidney disease26%
- Diabetes21%
- Cancer20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sewell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Clifford John Sewell wrote 3,806 Medicare Part D claims in 2024
In 2024, Dr. Sewell wrote 3,806 Medicare Part D claims for 219 patients. 83% of them were for generic drugs. CMS names the drug for 3,011 of them, across 92 drugs with 11 or more claims each, at $348,252 in total drug cost. In 2023, CMS named 2,623 claims across 82 drugs.
Dr. Sewell's Part D claims by kind of drug, 2024
- Generic3,158 claims83%
- Brand-name630 claims17%
- Other18 claims0%
Dr. Sewell'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. Sewell's Part D claims, 2024
- Opioids3%115 of 3,806 claims
- Antibiotics4%168 of 3,806 claims
- Antipsychotics, patients 65 and over1%31 of 3,806 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: 2,6232024: 3,01115%
Drugs named by CMS: 92 in 2024, 82 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. Clifford John Sewell takes part in Medicare
Dr. Sewell 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. Clifford John Sewell received $1,034 in industry payments from 2016 to 2025
CMS Open Payments shows 46 general payments to Dr. Sewell from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Alvogen Inc paid the most, $175.
General payments to Dr. Sewell by program year, 2016 to 2025
Companies that paid Dr. Sewell 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. Clifford John Sewell graduated from VCU School of Medicine
Dr. Sewell graduated from VCU School of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Clifford John Sewell accepts plans from 1 insurance carrier
Dr. Sewell is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Clifford John Sewell'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) |
| 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. Clifford John Sewell
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. Clifford John Sewell's NPI number?
Dr. Clifford John Sewell's NPI number is 1851437123. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Clifford John Sewell?
Dr. Clifford John Sewell is an internist in Danville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Clifford John Sewell practice?
Dr. Sewell practices at 400 El Cerro Blvd Ste 102, Danville, CA 94526-1731. Dr. Sewell's primary practice is Claret Medical in Danville, California. Dmand AI also links Dr. Sewell to 3 hospitals and 3 home health agencies.
What is Dr. Clifford John Sewell's office phone number?
The practice phone on file for Dr. Sewell is (925) 855-3780.
What is Dr. Clifford John Sewell's medical license number?
Dr. Sewell holds California license A55442.
Which hospitals is Dr. Clifford John Sewell affiliated with?
Dr. Sewell is affiliated with John Muir Medical Center, Walnut Creek. Dmand AI links Dr. Sewell to 3 more hospitals.
Does Dr. Clifford John Sewell accept Medicare?
Yes. CMS data shows Dr. Sewell billed Medicare for 463 services in 2024, and Dr. Sewell accepts Medicare assignment.
How many Medicare patients does Dr. Clifford John Sewell see?
CMS counts 163 Medicare patients who saw Dr. Sewell in 2024, with an average age of 80.
What services does Dr. Clifford John Sewell bill to Medicare?
In 2024, Dr. Sewell's most billed Medicare services were office visit, established patient (99212), office visit, established patient (99213) and office visit, new patient (99203).
Where did Dr. Clifford John Sewell go to medical school?
Dr. Sewell graduated from VCU School of Medicine in 1994.
Show 4 more questionsShow fewer questions
What drugs does Dr. Clifford John Sewell prescribe most?
In 2024 Medicare Part D data, Dr. Sewell's most prescribed drugs by claims were Atorvastatin Calcium, Zolpidem Tartrate and Levothyroxine Sodium.
Has Dr. Clifford John Sewell received payments from drug or device companies?
CMS Open Payments shows $1,034 in general payments to Dr. Sewell from 15 companies from 2016 to 2025. The largest total came from Alvogen Inc.
How long has Dr. Clifford John Sewell been practicing?
Dr. Sewell graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Clifford John Sewell accept?
Dr. Sewell is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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