John P. Demchak, D.O.
Internal Medicine Physician · Rock Hill, SC
John P. Demchak, D.O. is an internal medicine physician with a practice address in Rock Hill, South Carolina, and NPI 1346345345, issued on Sep 14, 2006. Check the license (South Carolina 880, as entered in NPPES) on the South Carolina Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John P. Demchak
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 880 SC
Self-reported in NPPES; status is on the state search - Practice location
- 205 Piedmont Blvd, Rock Hill, SC 29732
- Phone
- (803) 366-4848
- Enumerated
- Sep 14, 2006
- Record last updated
- Aug 11, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Also registered at 205 Piedmont Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tyrone Hart, LMSWClinical Social Worker1174792758
- Emily Johnson, MSWSocial Worker1386285369
- Angelika MahaffeyCounselor1841794328
- Nigel MitchellMental Health Counselor1457100414
- Harriet NewlanderRegistered Nurse1629516810
- Kara Schneider, M.A., LADC-1Mental Health Counselor1215256482
Verify John P. Demchak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John P. Demchak among 1,881 internal medicine physician records in South Carolina
John P. Demchak, D.O. is one of 1,881 internal medicine physician records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 58% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2017 · 46% 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 South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in South Carolina
There are 1,881 internal medicine physician records in South Carolina. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,881 in South Carolina → Every provider in Rock Hill → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anju Choudhury, MDRock Hill, SC 297321942266960
- Sushil Das, M.D.Rock Hill, SC 297321659353811
- Bamidele Ekunsanmi, M.DRock Hill, SC 297321932156171
- John Hoitink, MDRock Hill, SC 297321861484750
- Rhea Hsu, MDRock Hill, SC 297321952394744
- Matthew Jenkins, MDRock Hill, SC 297321467444133
- Rajesh Kedar, MDRock Hill, SC 297321659337681
- Sandra McMahon, M.D.,Rock Hill, SC 297321538189519
Common questions
What is John P. Demchak, D.O.'s NPI number?
John P. Demchak, D.O.'s National Provider Identifier (NPI) is 1346345345, issued on Sep 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John P. Demchak, D.O. located?
The NPPES record lists a practice address at 205 Piedmont Blvd, Rock Hill, SC, 29732. Phone: (803) 366-4848. Providers update this record themselves, so call before visiting.
How can I verify John P. Demchak, D.O.'s license?
NPPES lists South Carolina license number 880, 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.
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.