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

Dr. Terrence Welsh, M.D.

Anesthesiology Physician in Florham Park, NJ · enumerated 2009.

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

National Provider Identifier

1821231135

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Registry record

Entity type Individual (Type 1)

Name Dr. Terrence Welsh

Credential M.D.

Sex Male

Practice address Florham Park, NJ, 07932

Phone (973) 755-0190

Fax (973) 755-0191

Enumeration date Apr 16, 2009

Last updated in NPPES Jun 17, 2026

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

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 25MA08955700 (NJ) Primary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License 25MA08955700 (NJ) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 247701 (NY) Secondary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Terrence Welsh practice?

The practice location on file with NPPES is in Florham Park, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Terrence Welsh?

The National Provider Identifier (NPI) for Terrence Welsh is 1821231135, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Allied Anesthesia Associates Anesthesiology Physician · Florham Park, NJ NPI 1144720244 Excel Anesthesia Anesthesiology Physician · Florham Park, NJ NPI 1871103705 Fortera Health LLC Pain Medicine (Physical Medicine & Rehabilitation) Physician · Florham Park, NJ NPI 1639032931 Gautam Malhotra Physical Medicine & Rehabilitation Physician · Florham Park, NJ NPI 1407879000

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-17.