Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Theodoor Anthony Voorstad, MD

Internal Medicine Physician in York, PA · enumerated 2006.

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

National Provider Identifier

1558391235

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Registry record

Entity type Individual (Type 1)

Name Dr. Theodoor Anthony Voorstad

Credential MD

Sex Male

Practice address 2550 Kingston Rd, Suite 205, York, PA, 17402

Phone (717) 840-4646

Enumeration date Jul 5, 2006

Last updated in NPPES Jun 1, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD060494L (PA) 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
100493	Other	PA	GEISINGER
7798492	Other	PA	AETNA
32653	Other	PA	JOHNS HOPKINS
590875	Other	PA	HIGHMARK BLUE SHIELD
1146401	Other	PA	AMERIHEALTH MERCY-YH
298033	Other	PA	MAMSI-YH
80832	Other	PA	UNISON-YH
03126701	Other	PA	CAPITAL BLUE CROSS-YH
110234441	Other	PA	RAILROAD MEDICARE
614039	Other	MD	CAREFIRST MD BCBS
001857610	Medicaid	PA	-
P004684	Other	PA	GATEWAY-YH

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 NPI 1558391235 active?

Yes, as of the latest NPPES snapshot, NPI 1558391235 is active (record last updated 2010-06-01).

How do I verify Theodoor Voorstad's NPI record?

Cross-check NPI 1558391235 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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Daniel Aikins Psychologist · York, PA NPI 1669454831 MD at Home, Inc Adult Medicine Physician · York, PA NPI 1578518015 Nancy Pendergast-Herbst Clinical Social Worker · York, PA NPI 1598817181 Allison Kochert Professional Counselor · York, PA NPI 1902003288 Steven Erickson Clinical Psychologist · York, PA NPI 1326368796 York County in Home Care Inc. Home Health Agency · York, PA NPI 1164742391 Easter Seals Central PA Community/Behavioral Health Agency · York, PA NPI 1871832220 Mackin Home Care Inc In Home Supportive Care Agency · York, PA NPI 1902273147

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-01.