Leonard Clarkson Alsfeld, M.D.
Internal Medicine Physician · Charleston, SC
Leonard Clarkson Alsfeld, M.D. is an internal medicine physician with a practice address in Charleston, South Carolina, and NPI 1912346693, issued on Jun 17, 2013. Check the license (South Carolina LL35778, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Leonard Clarkson Alsfeld
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- LL35778 SC
Self-reported in NPPES; status is on the state search - Practice location
- 169 Ashley Ave, Charleston, SC 29425
- Phone
- (843) 792-1020
- Enumerated
- Jun 17, 2013
- Record last updated
- Jun 17, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210831003666); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 169 Ashley Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Claire Adcock, MDDiagnostic Radiology Physician1194352021
- George Adly, MDInternal Medicine Physician1942824115
- Ahmad Aleisa, MDInternal Medicine Physician1043735095
- Biff Alexander, MDPsychiatry Physician1619893641
- Margaret Allen, MDPediatrics Physician1598505026
Verify Leonard Clarkson Alsfeld in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license LL35778Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,726 Medicare Part D claims for 222 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims. 59 claims were for opioids.
Most prescribed
- Acyclovir188 claims
- Levofloxacin144 claims
- Venclexta110 claims
- Fluconazole79 claims
- Jakafi75 claims
- Allopurinol70 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: $51,134.42
53 payments; by number, the most common kind was food and beverage; the largest payer was Kite Pharma, Inc. 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.
Bills Medicare through one group practice
- Ochsner Clinic LLCNew Orleans, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
427 internal medicine physician records list a practice address in Charleston
They are 427 of the 10,840 NPPES records with a practice address in Charleston, and 1,881 internal medicine physician records in South Carolina.
All 427 in Charleston → All 1,881 in South Carolina → Every provider in Charleston →
Other internal medicine physician records in South Carolina
- Sheharyar Abbasi, DOMyrtle Beach, SC1619617222
- John Abbott, M.D.Sumter, SC1093830762
- Amjad Abdulrahman, MDIrmo, SC1194718841
- Alvin Abinsay, M.D.Marion, SC1689608002
- Izabela Abissi, DOCharleston, SC1376387803
- Tinu Abraham, MDGreenwood, SC1194354399
- Natallia Abramovich, MDSeneca, SC1568647949
- Ibrahim Abu Dayah, MDMyrtle Beach, SC1306368667
- Lauren Abusal, MD, MSCRMyrtle Beach, SC1093552911
- John Adams, MDElgin, SC1750395570
Common questions
What is Leonard Clarkson Alsfeld, M.D.'s NPI number?
Leonard Clarkson Alsfeld, M.D.'s National Provider Identifier (NPI) is 1912346693, issued on Jun 17, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Clarkson Alsfeld, M.D. located?
The NPPES record lists a practice address at 169 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-1020. Providers update this record themselves, so call before visiting.
How can I verify Leonard Clarkson Alsfeld, M.D.'s license?
NPPES lists South Carolina license number LL35778, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leonard Clarkson Alsfeld, M.D. prescribe under Medicare Part D?
In 2024, Leonard Clarkson Alsfeld, M.D. had 1,726 Medicare Part D claims for 222 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.