Lawrence Anthony Senffner, M.D.
Internal Medicine Physician · Arcata, CA
Lawrence Anthony Senffner, M.D. is an internal medicine physician with a practice address in Arcata, California, and NPI 1730120676, issued on Jun 10, 2006. Check the license (California G17651, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lawrence Anthony Senffner
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G17651 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3798 Janes RD, Arcata, CA 95521
- Phone
- (707) 822-2432
- Enumerated
- Jun 10, 2006
- Record last updated
- Dec 20, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (707) 822-6301
- Medicaid ID
- 00G176510 CA
- Medicare enrollment
- Enrolled (PECOS I20061005000410); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1967
- Entity
- Type 1 · individual
Also registered at 3798 Janes RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gary Garcia, M.D.Internal Medicine Physician1275513517
- Sheldon Meshulam, MDGastroenterology Physician1184720740
Verify Lawrence Anthony Senffner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G17651Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
221 Medicare Part D claims for 60 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Atorvastatin Calcium19 claims
- Spironolactone-Hctz19 claims
- Celecoxib11 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.
Bills Medicare through one group practice
- North Pacific Cardiology MedicalArcata, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Lawrence Anthony Senffner, M.D.'s NPI number?
Lawrence Anthony Senffner, M.D.'s National Provider Identifier (NPI) is 1730120676, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lawrence Anthony Senffner, M.D. located?
The NPPES record lists a practice address at 3798 Janes RD, Arcata, CA, 95521. Phone: (707) 822-2432. Providers update this record themselves, so call before visiting.
How can I verify Lawrence Anthony Senffner, M.D.'s license?
NPPES lists California license number G17651, 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 Lawrence Anthony Senffner, M.D. prescribe under Medicare Part D?
In 2024, Lawrence Anthony Senffner, M.D. had 221 Medicare Part D claims for 60 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.