Mark Seby, M.D.
NPI 1649277492 · Family Medicine Physician · Flagstaff, AZ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Seby, M.D. is a Family Medicine Physician provider in Flagstaff, AZ (NPI 1649277492).
Provider details
- NPI number
- 1649277492
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ZA11476 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
656 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 427 | $124 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 126 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $88 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 17 | $9 |
Typical Medicare-allowed amounts for these services range $9–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 190 | 53 |
| Levothyroxine Sodium | 181 | 46 |
| Amlodipine Besylate | 154 | 47 |
| Irbesartan | 133 | 37 |
| Rosuvastatin Calcium | 83 | 27 |
| Lisinopril | 81 | 21 |
| Apixabanbrand: Eliquis |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-07
- Last updated
- 2010-12-30
Frequently asked questions
- What is Mark Seby's NPI number?
- Mark Seby's National Provider Identifier (NPI) is 1649277492, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Seby's specialty?
- Mark Seby is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Seby located?
- Mark Seby's practice location on file with NPPES is 417 N Agassiz St, Flagstaff, AZ 86001-3206.
- What is Mark Seby's phone number?
- The practice phone number listed in the NPPES registry for Mark Seby is (928) 779-6169.
- Does Mark Seby accept Medicare?
- Mark Seby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Seby's NPI active?
- Yes — Mark Seby's NPI (1649277492) 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.