Courtney Zak, PA-C
Physician Assistant · Flagstaff, AZ
Courtney Zak, PA-C is a physician assistant with a practice address in Flagstaff, Arizona, and NPI 1558023317, issued on Oct 8, 2021. Check the license (Arizona 10477, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Courtney Zak
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 10477 AZ
PA2021-0115 NM
Self-reported in NPPES; status is on the state search - Practice location
- 107 E Oak Ave, Flagstaff, AZ 86001
- Phone
- (928) 779-7880
- Enumerated
- Oct 8, 2021
- Record last updated
- Aug 15, 2024
- Medicaid ID
- 80039251 NM
- Medicare enrollment
- Enrolled (PECOS I20240828002202); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,666 in Arizona → Look up another NPI →
Also registered at 107 E Oak Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Courtney Zak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 10477Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average physician assistant in 2024
107 Medicare Part D claims for 65 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Meloxicam27 claims
- Oxycodone Hcl21 claims
- Cephalexin16 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 MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Northern Arizona Healthcare CorporationFlagstaff, AZ
- Winslow Memorial Hospital IncWinslow, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Courtney Zak among 3,666 physician assistant records in Arizona
Courtney Zak, PA-C is one of 3,666 physician assistant records with a practice address in Arizona. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 64% of them.
- NPI issued2021 · 64% of these records are older, 30% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2018 among the 2,207 with a school on file
- Record last updated2024 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
63 physician assistant records list a practice address in Flagstaff
They are 63 of the 2,419 NPPES records with a practice address in Flagstaff, and 3,666 physician assistant records in Arizona.
All 3,666 in Arizona → Every provider in Flagstaff → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Michelle Boyer, PA-CFlagstaff, AZ 860011770519183
- Kelly Czarnecki, PACFlagstaff, AZ 860011043234610
- Tammy Doering, PAFlagstaff, AZ 860011609800135
- Erin Engel, PA-CFlagstaff, AZ 860011033152921
- Tara Gordon, P.A.Flagstaff, AZ 860011962552661
- Greg Harris, PA-CFlagstaff, AZ 860011487684049
- Colin Hickenlooper, PA-CFlagstaff, AZ 860011972550192
- Sandra Kellett, PA-CFlagstaff, AZ 860011396860169
Common questions
What is Courtney Zak, PA-C's NPI number?
Courtney Zak, PA-C's National Provider Identifier (NPI) is 1558023317, issued on Oct 8, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Courtney Zak, PA-C located?
The NPPES record lists a practice address at 107 E Oak Ave, Flagstaff, AZ, 86001. Phone: (928) 779-7880. Providers update this record themselves, so call before visiting.
How can I verify Courtney Zak, PA-C's license?
NPPES lists Arizona license number 10477, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Courtney Zak, PA-C prescribe under Medicare Part D?
In 2024, Courtney Zak, PA-C had 107 Medicare Part D claims for 65 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Courtney Zak, PA-C's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. 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.