Andrew James Overhiser, M.D.
Gastroenterology Physician · Flagstaff, AZ
Andrew James Overhiser, M.D. is a gastroenterology physician with a practice address in Flagstaff, Arizona, and NPI 1679789549, issued on May 15, 2007. Check the license (Arizona 42636, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Andrew James Overhiser
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 42636 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1215 N Beaver St, Flagstaff, AZ 86001
- Phone
- (928) 773-2200
- Enumerated
- May 15, 2007
- Record last updated
- Dec 12, 2024
- Fax
- (928) 773-2300
- Medicare enrollment
- Enrolled (PECOS I20100922000635); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 403 in Arizona → Look up another NPI →
Also registered at 1215 N Beaver St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cameron Allen, PA-CPhysician Assistant1972122844
- Michael Browne, PA-CSurgical Physician Assistant1669640587
- Tim BuschmannPsychologist1346853454
- Mark Carroll, MDPediatrics Physician1154595411
- Dore Davidson, SLPSpeech-Language Pathologist1568887891
- Justin Delange, D.O.Neurology Physician1689923096
Verify Andrew James Overhiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 42636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average gastroenterology physician in 2024
826 Medicare Part D claims for 493 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Peg 3350-Electrolyte267 claims
- Pantoprazole Sodium178 claims
- Omeprazole47 claims
- Famotidine39 claims
- Sod Sulf-Potass Sulf-Mag Sulf36 claims
- Gavilyte-N23 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 67.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $420.98
16 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northern Arizona Healthcare CorporationFlagstaff, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew James Overhiser among 403 gastroenterology physician records in Arizona
Andrew James Overhiser, M.D. is one of 403 gastroenterology physician records with a practice address in Arizona. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 59% of them.
- NPI issued2007 · 59% of these records are older, 31% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2004 · median 2001 among the 295 with a school on file
- Record last updated2024 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Arizona
There are 403 gastroenterology physician records in Arizona.
All 403 in Arizona → Every provider in Flagstaff → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Rodney Engel, M.D.Flagstaff, AZ 860011659351187
- Vincent Honan, MDFlagstaff, AZ 860011073585014
- Joan Mitrius, M.D.Flagstaff, AZ 860011356306724
- Steven Palley, M.D.Flagstaff, AZ 860011285699116
- Minh Tran, MDFlagstaff, AZ 860011144883638
- Michael Trujillo, M.D.Flagstaff, AZ 860011467417824
- John Harlan, MDPage, AZ 860401730129073
- Paul Butler, MDOro Valley, AZ 857551295784254
Common questions
What is Andrew James Overhiser, M.D.'s NPI number?
Andrew James Overhiser, M.D.'s National Provider Identifier (NPI) is 1679789549, issued on May 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Andrew James Overhiser, M.D. located?
The NPPES record lists a practice address at 1215 N Beaver St, Flagstaff, AZ, 86001. Phone: (928) 773-2200. Providers update this record themselves, so call before visiting.
How can I verify Andrew James Overhiser, M.D.'s license?
NPPES lists Arizona license number 42636, 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 Andrew James Overhiser, M.D. prescribe under Medicare Part D?
In 2024, Andrew James Overhiser, M.D. had 826 Medicare Part D claims for 493 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Andrew James Overhiser, M.D.'s MIPS final score?
The 2023 MIPS final score is 67.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.