Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James Sieber, MD

Q: What is the NPI number for James Sieber?

The National Provider Identifier (NPI) for James Sieber is 1477535417, a Type 1 (individual) record in the CMS NPPES registry.

Anesthesiology Physician in Morristown, NJ · enumerated 2005.

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

National Provider Identifier

1477535417

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Registry record

Entity type Individual (Type 1)

Name James Sieber

Credential MD

Sex Male

Practice address 100 Madison Ave, Morristown, NJ, 07960

Phone (800) 991-9133

Fax (201) 943-8733

Enumeration date Nov 16, 2005

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License MA66694 (NJ) 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
7665407	Medicaid	NJ	-

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 James Sieber practice?

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

What is the NPI number for James Sieber?

The National Provider Identifier (NPI) for James Sieber is 1477535417, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Tricia Johnson Surgical Physician Assistant · Morristown, NJ NPI 1003819384 Kevin Mcsherry Pediatrics Physician · Morristown, NJ NPI 1336145986 Mid-Atlantic Surgical Assoc. Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Morristown, NJ NPI 1619977741 Kathleen Pearl Adult Health Nurse Practitioner · Morristown, NJ NPI 1851392344 Laura Pesce Nurse Practitioner · Morristown, NJ NPI 1215938386 James Slater Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Morristown, NJ NPI 1841292232 Christopher Magovern Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Morristown, NJ NPI 1043212434 John Brown Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Morristown, NJ NPI 1164424529

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