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

Dr. Harrison Mark McDonald, DO

Individual provider Internal Medicine Physician · NPI 1447251798

Dr. Harrison Mark McDonald, DO is an Internal Medicine in Lake Havasu City, Arizona. Qualified in 1991, 35 years ago. Practices with Harrison Mark McDonald DO PLLC, a 2-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
35
Licensed in
AZ
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1923 McCulloch Blvd N Ste 101
Lake Havasu City, AZ 86403
Phone: (928) 208-4611
Fax: (928) 453-4645
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 309 Lake Havasu Ave S, Lake Havasu City, AZ 86403-9309 — (928) 453-1970

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2793 (AZ)

Record details

NPI number1447251798
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedAugust 9, 2005
Last updated in NPPESJanuary 26, 2026
Certification dateJanuary 26, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1991 (35 years in practice)
Group practice Harrison Mark McDonald Do Pllc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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