Jason Hatjioannou, MD
NPI 1740285923 · Internal Medicine Physician · Johnson City, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jason Hatjioannou, MD is a Internal Medicine Physician provider in Johnson City, TN (NPI 1740285923).
Provider details
- NPI number
- 1740285923
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 18504 (TN)
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
21 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
- 2005-06-15
- Last updated
- 2023-01-19
- Certified
- 2023-01-19
Frequently asked questions
- What is Jason Hatjioannou's NPI number?
- Jason Hatjioannou's National Provider Identifier (NPI) is 1740285923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jason Hatjioannou's specialty?
- Jason Hatjioannou is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jason Hatjioannou located?
- Jason Hatjioannou's practice location on file with NPPES is 1930 Villa Ct, Johnson City, TN 37615-4590.
- What is Jason Hatjioannou's phone number?
- The practice phone number listed in the NPPES registry for Jason Hatjioannou is (423) 913-1423.
- Does Jason Hatjioannou accept Medicare?
- Jason Hatjioannou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jason Hatjioannou's NPI active?
- Yes — Jason Hatjioannou's NPI (1740285923) is active in the NPPES registry as of the last update on 2023-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.