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

Ms. Joan Andersen Twombly, NP-C

Primary Care Nurse Practitioner in Pompton Plains, NJ · enumerated 2011.

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

National Provider Identifier

1073890562

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Registry record

Entity type Individual (Type 1)

Name Ms. Joan Andersen Twombly

Credential NP-C

Sex Female

Practice address Pompton Plains, NJ, 07444

Phone (973) 831-3540

Fax (973) 831-3503

Enumeration date Nov 10, 2011

Last updated in NPPES Jan 12, 2023

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

Taxonomy & licenses

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 004669 (CT) Secondary

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ00337400 (NJ) Secondary

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 101.0135933FCTY (VT) Primary

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 Joan Twombly's NPI record?

Cross-check NPI 1073890562 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1073890562 active?

Yes, as of the latest NPPES snapshot, NPI 1073890562 is active (record last updated 2023-01-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-12.