Mark V. Seby, M.D.
Family Medicine Physician · Flagstaff, AZ
Mark V. Seby, M.D. is a family medicine physician with a practice address in Flagstaff, Arizona, and NPI 1649277492, issued on Jul 7, 2005. Check the license (Arizona ZA11476, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark V. Seby
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- ZA11476 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 417 N Agassiz St, Flagstaff, AZ 86001
- Phone
- (928) 779-6169
- Enumerated
- Jul 7, 2005
- Record last updated
- Dec 30, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (928) 779-4200
- Medicaid ID
- 23957601 AZ
- Medicare enrollment
- Enrolled (PECOS I20040901000639); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →
Verify Mark V. Seby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license ZA11476Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average family medicine physician in 2024
2,943 Medicare Part D claims for 236 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 110 claims were for opioids.
Most prescribed
- Losartan Potassium190 claims
- Levothyroxine Sodium181 claims
- Amlodipine Besylate154 claims
- Irbesartan133 claims
- Rosuvastatin Calcium83 claims
- Lisinopril81 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Mark V. Seby among 3,119 family medicine physician records in Arizona
Mark V. Seby, M.D. is one of 3,119 family medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1978 · median 2006 among the 1,775 with a school on file
- Record last updated2010 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 family medicine physician records list a practice address in Flagstaff
They are 61 of the 2,419 NPPES records with a practice address in Flagstaff, and 3,119 family medicine physician records in Arizona.
All 3,119 in Arizona → Every provider in Flagstaff → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Demetra Barr Reynolds, M.D.Flagstaff, AZ 860011790721777
- Amy Britt, MDFlagstaff, AZ 860011558473744
- Leon Cattolico, D.O.Flagstaff, AZ 860011720084197
- Laurice Coats, MDFlagstaff, AZ 860011386647816
- Kent Diehl, MDFlagstaff, AZ 860011194745133
- Timothy Fleming, MDFlagstaff, AZ 860011407804099
- Byron Hutto, MDFlagstaff, AZ 860011457300253
- Meghan O'Donnell, MDFlagstaff, AZ 860011659323186
Common questions
What is Mark V. Seby, M.D.'s NPI number?
Mark V. Seby, M.D.'s National Provider Identifier (NPI) is 1649277492, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark V. Seby, M.D. located?
The NPPES record lists a practice address at 417 N Agassiz St, Flagstaff, AZ, 86001. Phone: (928) 779-6169. Providers update this record themselves, so call before visiting.
How can I verify Mark V. Seby, M.D.'s license?
NPPES lists Arizona license number ZA11476, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark V. Seby, M.D. prescribe under Medicare Part D?
In 2024, Mark V. Seby, M.D. had 2,943 Medicare Part D claims for 236 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.