William Mark Frederick, MA
Marriage & Family Therapist · Clemson, SC
William Mark Frederick, MA is a marriage & family therapist with a practice address in Clemson, South Carolina, and NPI 1851561393, issued on Mar 11, 2008. Check the license (South Carolina 4564, as entered in NPPES) with the South Carolina board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Mark Frederick
- Credential
- MA
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- License numbers
- 4564 SC
MFC 30357 CA
Self-reported in NPPES; status is on the state search - Practice location
- 214 Keowee Trl, Clemson, SC 29631
- Phone
- (864) 367-9023
- Enumerated
- Mar 11, 2008
- Record last updated
- Feb 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 214 Keowee Trl
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sally Jenkins, LMTSpecialist1386882637
- Kathleen May, M.A.Counselor1851515480
- Jake McKinney, PH.D.Counselor1124105572
- May Popham, LMTSpecialist1427262856
- Douglas Sturkie, PHDMarriage & Family Therapist1558434639
- A Threadgill, PSY.D.Professional Counselor1548376155
Verify William Mark Frederick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Carolina board licenses this profession
Search for license 4564Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5 marriage & family therapist records list a practice address in Clemson
They are 5 of the 369 NPPES records with a practice address in Clemson, and 435 marriage & family therapist records in South Carolina. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5 in Clemson → All 435 in South Carolina → Every provider in Clemson →
Other marriage & family therapist records in South Carolina
- Taynesha Adams, MMFT, LMFT/SGreenville, SC1184155665
- Shelby Albright, LMFTSpartanburg, SC1841701380
- Danielle Allen, ED.SColumbia, SC1841657707
- Caroline Allison, LMFT-AGreenville, SC1629910237
- Henry Anderson, LMFT-ISpartanburg, SC1538612528
- Deborah Armstrong, PH.D., LMFT, RPT-SGreenville, SC1508305889
- Dorothy ArnoldHopkins, SC1649974726
- Chelsea Arrington, LMFTGreenville, SC1912655283
- Ana ArtiguesCharleston, SC1134074537
- Stephanie Atkins, LMFTColumbia, SC1255459954
Common questions
What is William Mark Frederick, MA's NPI number?
William Mark Frederick, MA's National Provider Identifier (NPI) is 1851561393, issued on Mar 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William Mark Frederick, MA located?
The NPPES record lists a practice address at 214 Keowee Trl, Clemson, SC, 29631. Phone: (864) 367-9023. Providers update this record themselves, so call before visiting.
How can I verify William Mark Frederick, MA's license?
NPPES lists South Carolina license number 4564, as entered by the provider. Search the South Carolina board that licenses this profession; the NPPES record confirms identity 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. 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.