Mark Durback, MD
NPI 1689615601 · Rheumatology Physician · Easton, PA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Durback, MD is a Rheumatology Physician provider in Easton, PA (NPI 1689615601).
Provider details
- NPI number
- 1689615601
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD027186E (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
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
- 2006-06-09
- Last updated
- 2010-02-01
Frequently asked questions
- What is Mark Durback's NPI number?
- Mark Durback's National Provider Identifier (NPI) is 1689615601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Durback's specialty?
- Mark Durback is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Durback located?
- Mark Durback's practice location on file with NPPES is 21 Corporate Drive, Easton, PA 18045-2664.
- What is Mark Durback's phone number?
- The practice phone number listed in the NPPES registry for Mark Durback is (610) 250-9605.
- Does Mark Durback accept Medicare?
- Mark Durback is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Durback's NPI active?
- Yes — Mark Durback's NPI (1689615601) is active in the NPPES registry as of the last update on 2010-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.