Constantine Nicholas, MD
NPI 1295790228 · Orthopaedic Surgery Physician · Martinez, CA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Constantine Nicholas, MD is a Orthopaedic Surgery Physician provider in Martinez, CA (NPI 1295790228).
Provider details
- NPI number
- 1295790228
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301032764 (MI)
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
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
- 2006-04-20
- Last updated
- 2013-04-13
Frequently asked questions
- What is Constantine Nicholas's NPI number?
- Constantine Nicholas's National Provider Identifier (NPI) is 1295790228, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Constantine Nicholas's specialty?
- Constantine Nicholas is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Constantine Nicholas located?
- Constantine Nicholas's practice location on file with NPPES is 2500 Alhambra Ave, Martinez, CA 94553-3156.
- What is Constantine Nicholas's phone number?
- The practice phone number listed in the NPPES registry for Constantine Nicholas is (925) 370-5200.
- Does Constantine Nicholas accept Medicare?
- Constantine Nicholas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Constantine Nicholas's NPI active?
- Yes — Constantine Nicholas's NPI (1295790228) is active in the NPPES registry as of the last update on 2013-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.