Stephen Ruffenach, DO
NPI 1821054156 · Internal Medicine Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Ruffenach, DO is a Internal Medicine Physician provider in Tucson, AZ (NPI 1821054156).
Provider details
- NPI number
- 1821054156
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 2640 (AZ)
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
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
- 2006-04-25
- Last updated
- 2008-10-10
Frequently asked questions
- What is Stephen Ruffenach's NPI number?
- Stephen Ruffenach's National Provider Identifier (NPI) is 1821054156, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Ruffenach's specialty?
- Stephen Ruffenach is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Ruffenach located?
- Stephen Ruffenach's practice location on file with NPPES is 6200 N La Cholla Blvd, Tucson, AZ 85741-3529.
- What is Stephen Ruffenach's phone number?
- The practice phone number listed in the NPPES registry for Stephen Ruffenach is (520) 469-8780.
- Does Stephen Ruffenach accept Medicare?
- Stephen Ruffenach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Ruffenach's NPI active?
- Yes — Stephen Ruffenach's NPI (1821054156) is active in the NPPES registry as of the last update on 2008-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.