William Mitsos, M.D.
NPI 1578533774 · Obstetrics & Gynecology Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mitsos, M.D. is a Obstetrics & Gynecology Physician provider in Greenville, SC (NPI 1578533774).
Provider details
- NPI number
- 1578533774
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD052801L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 2315 Myrtle St Ste 290Erie, PA 16502-4609Phone: (814) 452-5504Fax: (814) 452-5514
Registry dates
- Enumerated
- 2006-01-23
- Last updated
- 2024-08-02
- Certified
- 2024-08-02
Frequently asked questions
- What is William Mitsos's NPI number?
- William Mitsos's National Provider Identifier (NPI) is 1578533774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mitsos's specialty?
- William Mitsos is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is William Mitsos located?
- William Mitsos's practice location on file with NPPES is 1120 Grove Rd, Greenville, SC 29605-4656.
- What is William Mitsos's phone number?
- The practice phone number listed in the NPPES registry for William Mitsos is (864) 455-8897.
- Does William Mitsos accept Medicare?
- William Mitsos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mitsos's NPI active?
- Yes — William Mitsos's NPI (1578533774) is active in the NPPES registry as of the last update on 2024-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.