Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Marcus W Fossmeyer, DNP, PMHNP

Individual provider Registered Nurse · NPI 1447773478

Dr. Marcus W Fossmeyer, DNP, PMHNP is a Nurse Practitioner in Mesa, Arizona. Qualified in 2017, 9 years ago. Practices with Denova Collaborative Health, LLC, a 143-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Arizona.

Years since qualifying
9
Licensed in
AZ
In the registry since
2017
Specialties on file
2
What do these letters mean?
DNP — Doctor of Nursing Practice
The highest clinical degree in nursing.
PMHNP — Psychiatric-Mental Health Nurse Practitioner
A nurse practitioner specialising in mental health, able to prescribe psychiatric medication.

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Practice location Address checks out

2120 W Guadalupe Rd Ste 6
Mesa, AZ 85202-7366
Phone: (602) 230-7373
Fax: (480) 628-8577
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3330 N 2nd St Ste 601, Phoenix, AZ 85012-2395 — (602) 230-7373

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence AP10434 (AZ)
Registered Nurse Taxonomy 163W00000X · Licence RN175917 (AZ)

Record details

NPI number1447773478
Entity typeIndividual (Type 1)
GenderMale
Credentials DNP , PMHNP
Sole proprietorNo
NPI enumeratedJuly 21, 2017
Last updated in NPPESJuly 10, 2026
Certification dateJuly 10, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Denova Collaborative Health, Llc — 143 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients24
Services billed 93 a service is one billed item, such as a visit, a test or a procedure
Average patient age64

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $124 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Denova Collaborative Health, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 143 clinicians in the practice; 12 are shown here.

Other providers in Mesa