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Dr. Mark Danforth Lacy, MD

Infectious Disease Physician in Prescott, AZ · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1134177215

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Danforth Lacy
Credential MD
Sex Male
Practice address 300 N Lee Blvd, Prescott, AZ, 86301
Phone (928) 708-4603
Fax (928) 445-9209
Enumeration date May 4, 2006
Last updated in NPPES Aug 13, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 45341 (TX) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 143343 (MT) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 45341 (TX) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 01598 (NC) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License MD2020-0241 (NM) Secondary
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD2020-0241 (NM) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License Q8279 (TX) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD2020-0241 (NM) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 15404 (AZ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mark Lacy?
Mark Lacy is registered in NPPES with the primary taxonomy of Infectious Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-13.