Mark Seby MD PC
NPI 1477726222 · Family Medicine Physician · Flagstaff, AZ
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Seby MD PC is a Family Medicine Physician organization in Flagstaff, AZ (NPI 1477726222).
Provider details
- NPI number
- 1477726222
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Seby, Physician(928) 779-6169
- License
- AZ11476 (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
18 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
Other names (DBA / former)
- Doing business as
- Agassiz Family Medicine
Registry dates
- Enumerated
- 2008-04-11
- Last updated
- 2010-12-30
Frequently asked questions
- What is Mark Seby MD PC's NPI number?
- Mark Seby MD PC's National Provider Identifier (NPI) is 1477726222, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Seby MD PC?
- Mark Seby MD PC is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Seby MD PC located?
- Mark Seby MD PC's practice location on file with NPPES is 417 N Agassiz St, Flagstaff, AZ 86001-3282.
- What is Mark Seby MD PC's phone number?
- The practice phone number listed in the NPPES registry for Mark Seby MD PC is (928) 779-6169.
- Does Mark Seby MD PC accept Medicare?
- Mark Seby MD PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark Seby MD PC?
- The authorized official listed on Mark Seby MD PC's NPPES record is Mark Seby, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Seby MD PC's NPI active?
- Yes — Mark Seby MD PC's NPI (1477726222) is active in the NPPES registry as of the last update on 2010-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.