Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan M Armstrong, M.D.

General Practice Physician in Grand Rapids, MI · enumerated 2006.

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

National Provider Identifier

1174579767

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Registry record

Entity type Individual (Type 1)

Name Alan M Armstrong

Credential M.D.

Sex Male

Practice address 300 68th St Se, Grand Rapids, MI, 49548

Phone (616) 455-5000

Enumeration date May 25, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 4301042409 (MI) 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
2928888	Medicaid	MI	-

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 Alan Armstrong?

Alan Armstrong is registered in NPPES with the primary taxonomy of General Practice Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Emergency Physicians Inc PC General Practice Physician · Grand Rapids, MI NPI 1114920550 Susan Yoder Psychiatric/Mental Health Nurse Practitioner · Grand Rapids, MI NPI 1295721967 Matthew Jachalke Clinical Social Worker · Grand Rapids, MI NPI 1306833439 Eric Achtyes Psychiatry Physician · Grand Rapids, MI NPI 1780665976 Eric Erickson Psychiatry Physician · Grand Rapids, MI NPI 1558342220 Kevin Furmaga Psychiatric Pharmacist · Grand Rapids, MI NPI 1851373104 Bruce Springer Internal Medicine Physician · Grand Rapids, MI NPI 1871567735 Pine Rest Christian Mental Health Services Psychiatric Hospital · Grand Rapids, MI NPI 1982672762

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.