Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Mark Lehman, DO

Internal Medicine Physician in Springfield, PA · enumerated 2006.

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

National Provider Identifier

1598744112

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Mark Lehman

Credential DO

Sex Male

Practice address 1001 Baltimore Pike, Suite 111, Springfield, PA, 19064

Phone (610) 690-1776

Fax (610) 690-1777

Enumeration date Jan 12, 2006

Last updated in NPPES May 7, 2008

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OS00378L (PA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
94488	Other	PA	AETNA HMO
141486	Other	PA	BLUE SHIELD
0031282000	Other	PA	KHPE
3460726010	Other	PA	CIGNA
4402484	Other	PA	ANETA PPO
30035745	Other	PA	KMHP
007355370005	Medicaid	PA	-

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

How do I verify Gregory Lehman's NPI record?

Cross-check NPI 1598744112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1598744112 active?

Yes, as of the latest NPPES snapshot, NPI 1598744112 is active (record last updated 2008-05-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-07.