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Internal Medicine Providers in Flagstaff, AZ

Browse 30 Internal Medicine providers listed in NPPES with a practice address in Flagstaff, Arizona.

30 Healthcare Providers

How Flagstaff compares with the U.S.

Flagstaff has 39 clinicians in Internal Medicine per 100,000 residents, 12% lower than the U.S. rate of 44.

That is 30 active clinicians in Internal Medicine with a practice address in Flagstaff, for a population of 76,445.

That is close to the Arizona rate of 39.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.

89% of clinicians in Internal Medicine in Flagstaff listed in the CMS Medicare file (16 of 18) accept Medicare assignment. That is lower than the Arizona share of 97%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

44% of clinicians in Internal Medicine in Flagstaff listed in the CMS Medicare file (8 of 18) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Arizona share of 29%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Flagstaff, AZ

Source: CMS PECOS
PECOS Enrolled Specialists 25 In Flagstaff, AZ
Part B Lab & Imaging Eligible 25 Diagnostic Referrals
DME Ordering Eligible 25 Durable Medical Equipment
Home Health Agency Referrals 25 HHA Ordering Eligible
Showing 1โ€“20 of 30 providers
With recent CMS data first, then Aโ€“Z

Dr. Jane E Bigler , MD

Internal Medicine

Active NPI Status
107 E Oak Ave, Suite 201, Flagstaff, AZ 860011818
Phone: 9289138800
NPI Identifier 1285607952
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Dr. Lauren Gail Breihan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3480 E. Route 66, Flagstaff, AZ 86004
Phone: 9288637333
NPI Identifier 1497866495
View Full Profile

Dr. Jennifer Ekdahl Cortes , MD

Internal Medicine

Active NPI Status
1120 W University Ave Ste 101, Flagstaff, AZ 860012851
Phone: 9285221300
NPI Identifier 1225204381
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Dr. Heather Daryl Crittenden , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3400 Escalante Ovi, Flagstaff, AZ 860013752
Phone: 9282261239
NPI Identifier 1467448142
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Dr. Sharon Lynn Drake , DO

Internal Medicine

Active NPI Status
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9282142920
NPI Identifier 1801996632
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Dr. Rafael Arnoldo Fernandez , MD

Internal Medicine

Active NPI Status
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9282142920
NPI Identifier 1831484500
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Dr. David S Grauman , MD, PC, MRO

Internal Medicine

Active NPI Status
12340 N Eagle Rd, Flagstaff, AZ 860045326
Phone: 9286867858
NPI Identifier 1508993429
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Dr. Thomas Ho , MD

Internal Medicine

Active NPI Status
2700 S Woodlands Village Blvd Ste 700, Flagstaff, AZ 860012938
Phone: 9284405406
NPI Identifier 1538154505
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Dr. Alexander Hu , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
399 S Malpais Ln, Flagstaff, AZ 860016218
Phone: 4804438400
NPI Identifier 1306145859
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Dr. Julia A Jacobs , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9282142920
NPI Identifier 1285862482
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Dr. Jeffrey Craig Mazique , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1501 S Yale St Ste 150&151, Flagstaff, AZ 860017304
Phone: 9285274325
NPI Identifier 1902905300
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Dr. John Mougin , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9282142920
NPI Identifier 1851387278
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Dr. Anne M Newland , MD

Internal Medicine

Active NPI Status
2920 N 4th St, Flagstaff, AZ 860041816
Phone: 9285229400
NPI Identifier 1336178912
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Dr. Lu J Pan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9287793366
NPI Identifier 1477843449
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Dr. Mark Henry Pico , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
107 E Oak Ave, Flagstaff, AZ 860011818
Phone: 9289138800
NPI Identifier 1629284211
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Dr. Keith T Ryan , MD

Internal Medicine

Active NPI Status Telehealth Services Available
107 E Oak Ave, Suite 202, Flagstaff, AZ 860011818
Phone: 9282138633
NPI Identifier 1366416869
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Dr. Elizabeth Sauvage , DO

Internal Medicine

Active NPI Status
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9287732451
NPI Identifier 1619387115
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Dr. Randall Perry Scott , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
930 N. Switzer Canyon Dr., Suite 202, Flagstaff, AZ 86001
Phone: 9287795707
NPI Identifier 1235138744
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Dr. Bridget Bonsall Stiegler , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
914 N San Francisco St Ste M, Flagstaff, AZ 860013254
Phone: 9282660036
NPI Identifier 1740494665
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Dr. Matthew Theodore Stuart , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1200 N Beaver St, Flagstaff, AZ 860013118
Phone: 9282142920
NPI Identifier 1851824163
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Frequently Asked Questions about Internal Medicine in Flagstaff

How do I check a Internal Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Arizona licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.