DR. MARK HOWARD NICHOLSON MD
NPI 1235126566
Psychiatry & Neurology - Psychiatry in Billings, MT

Q: What is Mark Nicholson's NPI number?

The NPI number for Mark Nicholson is 1235126566. It was assigned to this individual provider in the NPPES registry on October 3, 2005.

Q: What is Mark Nicholson's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Mark Nicholson was last updated on February 22, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.

Active since October 03, 2005

1018 N 30TH ST, BILLINGS, MT 59101(406) 245-1559(406) 564-1313 Get Directions Write a Review

NPPES record last updated: February 22, 2016. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Mark Howard Nicholson Md NPPES

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

DR. MARK HOWARD NICHOLSON MD (NPI 1235126566) is an individual psychiatry provider in Billings, Montana, licensed in Montana (7623) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1235126566

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. MARK HOWARD NICHOLSONCredential: MD

Location Address1018 N 30TH STBillings, MT 59101-0732

Mailing AddressPo Box 2315Billings, MT 59103-2315 · (406) 245-1559 · Fax (406) 564-1313

Phone(406) 245-1559

Fax(406) 564-1313

Sole ProprietorYes

Enumeration DateOctober 3, 2005

Last NPPES UpdateFebruary 22, 2016

✔ NPI 1235126566 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in MT · 7623

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

1018 N 30TH ST, Billings, MT 59101

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Other Identifiers 4

Other98195MT · Blue Cross Blue Shield

Medicare UPIND07737

Medicare ID-Type UnspecifiedP0022378Railroad Medicare

Medicare ID-Type Unspecified000084239

Other Providers at the Same Location NPPES 12

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

BRYAN CANTWELL MS, LCPC

Counselor (Mental Health)