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

Dr. Mark Danforth Lacy, MD

Individual provider Internal Medicine Physician · NPI 1134177215

Dr. Mark Danforth Lacy, MD is an Infectious Disease in Prescott, Arizona. Qualified in 1983, 43 years ago. Practices with Yavapai Regional Medical Center Physician Care LLC, a 119-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Arizona, Montana, North Carolina and New Mexico and 1 more.

Years since qualifying
43
Licensed in
AZ, MT, NC, NM, TX
In the registry since
2006
Specialties on file
9
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

300 N Lee Blvd
Prescott, AZ 86301-5710
Phone: (928) 708-4603
Fax: (928) 445-9209
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 430 Windward Way Ste 100, Kalispell, MT 59901-2619 — (406) 751-5364
  • 210 Sunnyview Ln Ste 105, Kalispell, MT 59901-3128 — (406) 756-4727
  • Dept Internal Medicine 1 University Nm Msc 10-5550, Albuquerque, NM 87131-0001 — (505) 272-1670

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 15404 (AZ)
Internal Medicine Physician Taxonomy 207R00000X · Licence 45341 (TX)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 143343 (MT)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 45341 (TX)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 01598 (NC)
Infectious Disease Physician Taxonomy 207RI0200X · Licence MD2020-0241 (NM)
Pediatrics Physician Taxonomy 208000000X · Licence MD2020-0241 (NM)
Hospitalist Physician Taxonomy 208M00000X · Licence Q8279 (TX)
Hospitalist Physician Taxonomy 208M00000X · Licence MD2020-0241 (NM)

Record details

NPI number1134177215
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2006
Last updated in NPPESAugust 13, 2025
Certification dateAugust 13, 2025
Mailing addressPo Box 10880, Prescott, AZ 86304-0880

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Yavapai Regional Medical Center Physician Care Llc — 119 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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