John Demchak, D.O.
NPI 1346345345 · Internal Medicine Physician · Rock Hill, SC
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Demchak, D.O. is a Internal Medicine Physician provider in Rock Hill, SC (NPI 1346345345).
Provider details
- NPI number
- 1346345345
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 880 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2017-08-11
Frequently asked questions
- What is John Demchak's NPI number?
- John Demchak's National Provider Identifier (NPI) is 1346345345, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Demchak's specialty?
- John Demchak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Demchak located?
- John Demchak's practice location on file with NPPES is 205 Piedmont Blvd, Rock Hill, SC 29732-1836.
- What is John Demchak's phone number?
- The practice phone number listed in the NPPES registry for John Demchak is (803) 366-4848.
- Does John Demchak accept Medicare?
- John Demchak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Demchak's NPI active?
- Yes — John Demchak's NPI (1346345345) is active in the NPPES registry as of the last update on 2017-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.