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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN MALLOY MD
NPI 1629064845
Family Medicine in Billings, MT

Active since September 22, 2005
123 S 27TH ST, BILLINGS, MT 59101(406) 247-3350 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. John Malloy Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN MALLOY MD (NPI 1629064845) is an individual family medicine provider in Billings, Montana, licensed in Montana (4839) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1629064845
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. JOHN MALLOYCredential: MD
Location Address123 S 27TH STBillings, MT 59101-4200
Mailing Address24 Gold Pan LnBillings, MT 59105-1610
Phone(406) 247-3350
Sole ProprietorNo
Enumeration DateSeptember 22, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1629064845 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in MT · 4839
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
123 S 27TH ST, Billings, MT 59101
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Other Identifiers 1

Medicaid0057579MT

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KARMEN HAMMERMEISTER RN
Registered Nurse
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3382
DR. JENNIFER AKIKO VINNOLA DRPH, MS, RD
Dietitian, Registered
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3350
SAMANTHA MILLER RN
Registered Nurse
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3350
PAMELA WETSTEIN RN
Registered Nurse
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3220
YELLOWSTONE CITY COUNTY HEALTH DEPARTMENT
Public Health or Welfare
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3200
SHAE ELIZABETH SAUNDERS MD
Family Medicine
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3350
ASHLEY DAWN MARIE BAUMEISTER
Registered Nurse (Case Management)
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3360
MEGAN B LITTLEFIELD M.D.
Internal Medicine
123 S 27TH ST
BILLINGS, MT 59101
Yellowstone County (406) 247-3350

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Malloy's NPI number?

The NPI number for John Malloy is 1629064845. It was assigned to this individual provider in the NPPES registry on September 22, 2005.

Where is John Malloy located?

John Malloy practices at 123 S 27th St, Billings, MT 59101. The listed phone number is (406) 247-3350.

What is John Malloy's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for John Malloy was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.