Stephen James McMahan, PA-C
Physician Assistant · Phoenix, AZ
Stephen James McMahan, PA-C is a physician assistant with a practice address in Phoenix, Arizona, and NPI 1225556780, issued on Sep 5, 2017. Check the license (Arizona 6812, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephen James McMahan
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 6812 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 5777 E Mayo Blvd, Phoenix, AZ 85054
- Phone
- (480) 342-1387
- Enumerated
- Sep 5, 2017
- Record last updated
- Oct 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171003006033); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,666 in Arizona → Look up another NPI →
Also registered at 5777 E Mayo Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen James McMahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 6812Check 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 50 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
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): 78.6 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).
Bills Medicare through one group practice
- Mayo Clinic ArizonaScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen James McMahan among 3,666 physician assistant records in Arizona
Stephen James McMahan, 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 2017, is newer than 44% of them.
- NPI issued2017 · 44% of these records are older, 52% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2017 · median 2018 among the 2,207 with a school on file
- Record last updated2020 · 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).
923 physician assistant records list a practice address in Phoenix
They are 923 of the 31,399 NPPES records with a practice address in Phoenix, and 3,666 physician assistant records in Arizona.
All 3,666 in Arizona → Every provider in Phoenix → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Howard Asaki, P.A.-C.Phoenix, AZ 850541801878228
- Michele Cambria, P.A.-C.Phoenix, AZ 850541265415210
- Dondii Delgado, PA-CPhoenix, AZ 850541033119532
- Rhonda Eiland, P.A.-C.Phoenix, AZ 850541205810496
- Kristen Kalkbrenner, P.A.-C.Phoenix, AZ 850541871576819
- Laura Klusovsky, P.A.-C.Phoenix, AZ 850541679556641
- Heather Lucas, P.A.-C.Phoenix, AZ 850541104809144
- Karin Parrett, P.A. - CPhoenix, AZ 850541093797953
Common questions
What is Stephen James McMahan, PA-C's NPI number?
Stephen James McMahan, PA-C's National Provider Identifier (NPI) is 1225556780, issued on Sep 5, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Stephen James McMahan, PA-C located?
The NPPES record lists a practice address at 5777 E Mayo Blvd, Phoenix, AZ, 85054. Phone: (480) 342-1387. Providers update this record themselves, so call before visiting.
How can I verify Stephen James McMahan, PA-C's license?
NPPES lists Arizona license number 6812, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Stephen James McMahan, PA-C prescribe under Medicare Part D?
In 2024, Stephen James McMahan, PA-C had 107 Medicare Part D claims for 50 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Stephen James McMahan, PA-C's MIPS final score?
The 2023 MIPS final score is 78.6 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.