Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark Stephen Walmer, MD

Individual provider Internal Medicine Physician · NPI 1629166053

Mark Stephen Walmer, MD practises Internal Medicine in Chandler, Arizona. Graduated from Medical University of South Carolina College of Medicine in 1984, 42 years ago. Practices with East Valley Internal Medicine PC, a 3-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona.

Years since qualifying
42
Trained at
Medical University of South Carolina College of Medicine
Licensed in
AZ
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

655 S Dobson Rd A201
Chandler, AZ 85224-5669 Not confirmed with CMS for 15 years — call before visiting
Phone: (480) 821-3821
Fax: (186) 677-7239
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 15974 (AZ)

Record details

NPI number1629166053
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESSeptember 16, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesADDICTION MEDICINE
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice East Valley Internal Medicine Pc — 3 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 patients697
Services billed 15,497 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at East Valley Internal Medicine PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Chandler