Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan S Keller, MD

Psychiatry Physician in Malvern, PA · enumerated 2007.

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

National Provider Identifier

1669526539

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Registry record

Entity type Individual (Type 1)

Name Alan S Keller

Credential MD

Sex Male

Practice address 325 Central Ave, Suite 102, Malvern, PA, 19355

Phone (610) 296-0142

Fax (610) 651-2880

Enumeration date Jan 22, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD-018947-E (PA) Primary

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

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 Keller?

Alan Keller is registered in NPPES with the primary taxonomy of Psychiatry 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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M Hossein Etezady Child & Adolescent Psychiatry Physician · Malvern, PA NPI 1548249840 Emmie Amerine Adult Health Nurse Practitioner · Malvern, PA NPI 1467428474 Norman Callahan Gastroenterology Physician · Malvern, PA NPI 1851367783 Main Line Endoscopy Center LLC Endoscopy Clinic/Center · Malvern, PA NPI 1871569780 Matthew Astroff Gastroenterology Physician · Malvern, PA NPI 1457327439 Rupal Kothari Gastroenterology Physician · Malvern, PA NPI 1124094073 Richard Tolin Gastroenterology Physician · Malvern, PA NPI 1548237415 Main Line Gastroenterology Associates, PC Gastroenterology Physician · Malvern, PA NPI 1467429365

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.