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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. WILLIAM H NELSON MD
NPI 1114917911
Psychiatry & Neurology - Psychiatry in Augusta, ME

Active since October 24, 2005
250 ARSENAL ST, 11 SHS, AUGUSTA, ME 04333(207) 624-4658(207) 287-6123 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. William H Nelson Md NPPES

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

DR. WILLIAM H NELSON MD (NPI 1114917911) is an individual psychiatry provider in Augusta, Maine, licensed in Maine (015493) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1114917911
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. WILLIAM H NELSONCredential: MD
Location Address250 ARSENAL ST, 11 SHSAugusta, ME 04333-0011
Mailing Address19 Blueberry CvYarmouth, ME 04096-6525 · (207) 846-3694
Phone(207) 624-4658
Fax(207) 287-6123
Sole ProprietorNo
Enumeration DateOctober 24, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1114917911 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 ME · 015493
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.
250 ARSENAL ST, Augusta, ME 04333
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Other Providers at the Same Location NPPES 9

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

MS. REGANA CONTINI SISSON M.D.
Psychiatry & Neurology (Psychiatry)
250 ARSENAL ST
AUGUSTA, ME 04333
Kennebec County (207) 624-3981
DR. TERESA M MAYO M.ED, PSYD
Psychologist (Clinical)
250 ARSENAL ST, 11 SHS
AUGUSTA, ME 04333
Kennebec County (207) 624-4664
MR. STEPHEN G BREWER NP
Nurse Practitioner (Adult Health)
250 ARSENAL ST, 11 SHS
AUGUSTA, ME 04333
Kennebec County (207) 624-4657
ALAN P NEUREN MD
Psychiatry & Neurology (Neurology)
250 ARSENAL ST, 11 SHS
AUGUSTA, ME 04333
Kennebec County (207) 624-4657
STATE OF MAINE
Psychiatric Hospital
250 ARSENAL ST
AUGUSTA, ME 04333
Kennebec County (207) 287-2293
DR. TATIANA W GREGOR ED.D
Psychologist (Clinical)
250 ARSENAL ST, 11 SHS
AUGUSTA, ME 04333
Kennebec County (207) 624-3982
DR. JEFFREY M FLIESSER MD
Psychiatry & Neurology (Forensic Psychiatry)
250 ARSENAL ST, 11 SHS
AUGUSTA, ME 04333
Kennebec County (207) 624-4657
RUSSELL B KIMBALL PA-C
Physician Assistant
250 ARSENAL ST
AUGUSTA, ME 04333
Kennebec County (207) 624-4657

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 William Nelson's NPI number?

The NPI number for William Nelson is 1114917911. It was assigned to this individual provider in the NPPES registry on October 24, 2005.

Where is William Nelson located?

William Nelson practices at 250 Arsenal St 11 Shs, Augusta, ME 04333. The listed phone number is (207) 624-4658.

What is William Nelson's specialty?

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

When was this NPI record last updated?

The NPPES record for William Nelson 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 24 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.