Marcus De Volder
NPI 1689282097 · Clinical Social Worker · Tucson, AZ
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus De Volder is a Clinical Social Worker provider in Tucson, AZ (NPI 1689282097).
Provider details
- NPI number
- 1689282097
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- LCSW-18671 (AZ)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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
- 2020-07-21
- Last updated
- 2020-07-21
- Certified
- 2020-07-21
Frequently asked questions
- What is Marcus De Volder's NPI number?
- Marcus De Volder's National Provider Identifier (NPI) is 1689282097, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus De Volder's specialty?
- Marcus De Volder is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marcus De Volder located?
- Marcus De Volder's practice location on file with NPPES is 8110 E Speedway Blvd Apt 8391, Tucson, AZ 85710-1782.
- What is Marcus De Volder's phone number?
- The practice phone number listed in the NPPES registry for Marcus De Volder is (520) 400-9859.
- Does Marcus De Volder accept Medicare?
- Marcus De Volder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus De Volder's NPI active?
- Yes — Marcus De Volder's NPI (1689282097) is active in the NPPES registry as of the last update on 2020-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.