Clifford John Sewell, M.D.
Internal Medicine Physician · Danville, CA
Clifford John Sewell, M.D. is an internal medicine physician with a practice address in Danville, California, and NPI 1851437123, issued on Jan 30, 2007. Check the license (California A55442, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Clifford John Sewell
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A55442 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 EL Cerro Blvd Ste 102, Danville, CA 94526
- Phone
- (925) 855-3780
- Enumerated
- Jan 30, 2007
- Record last updated
- Oct 1, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (925) 855-3785
- Medicare enrollment
- Enrolled (PECOS I20210113002285); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Clifford John Sewell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A55442Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average internal medicine physician in 2024
3,806 Medicare Part D claims for 219 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 115 claims were for opioids.
Most prescribed
- Atorvastatin Calcium183 claims
- Zolpidem Tartrate141 claims
- Levothyroxine Sodium131 claims
- Rosuvastatin Calcium105 claims
- Amlodipine Besylate102 claims
- Gabapentin79 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $161.44
7 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Clifford John Sewell among 17,696 internal medicine physician records in California
Clifford John Sewell, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 internal medicine physician records list a practice address in Danville
They are 20 of the 897 NPPES records with a practice address in Danville, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Danville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sonal Advani, MDDanville, CA 945261861681447
- Chelsea Bowman, M.D.Danville, CA 945261033485958
- Lee Eisan, MDDanville, CA 945261871674333
- Margo Estrin, M.D.Danville, CA 945261891840096
- Philip FischbacherDanville, CA 945261467802264
- Denise Hilliard, M.D.Danville, CA 945261053375188
- Lisa Hudson, M.D.Danville, CA 945261760427702
- Jacqueline Jayan, M.D.Danville, CA 945261780001792
Common questions
What is Clifford John Sewell, M.D.'s NPI number?
Clifford John Sewell, M.D.'s National Provider Identifier (NPI) is 1851437123, issued on Jan 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Clifford John Sewell, M.D. located?
The NPPES record lists a practice address at 400 EL Cerro Blvd Ste 102, Danville, CA, 94526. Phone: (925) 855-3780. Providers update this record themselves, so call before visiting.
How can I verify Clifford John Sewell, M.D.'s license?
NPPES lists California license number A55442, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clifford John Sewell, M.D. prescribe under Medicare Part D?
In 2024, Clifford John Sewell, M.D. had 3,806 Medicare Part D claims for 219 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.