Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William A Nish, M.D.

Allergy & Immunology Physician in Gainesville, GA · enumerated 2005.

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

National Provider Identifier

1821097643

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Registry record

Entity type Individual (Type 1)

Name William A Nish

Credential M.D.

Sex Male

Practice address Gainesville, GA, 30501

Phone (770) 534-9933

Fax (770) 534-8999

Enumeration date Jul 14, 2005

Last updated in NPPES Oct 7, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 031804 (GA) Secondary

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 03180 (GA) Secondary

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 031804 (GA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00606559E	Medicaid	GA	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1821097643 active?

Yes, as of the latest NPPES snapshot, NPI 1821097643 is active (record last updated 2020-10-07).

How do I verify William Nish's NPI record?

Cross-check NPI 1821097643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Lauren Tamplin Family Nurse Practitioner · Gainesville, GA NPI 1700882446 Faria Khan Allergy & Immunology Physician · Gainesville, GA NPI 1548212087 Kimberley Shanks Allergy & Immunology Physician · Gainesville, GA NPI 1508887621 Allergy & Asthma Care Center, LLC Specialist · Gainesville, GA NPI 1083744312 Susan Oliver Nurse Practitioner · Gainesville, GA NPI 1669502522 Northeast Georgia Physicians Group, Inc. Allergy Physician · Gainesville, GA NPI 1699395772

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-07.