Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jon R Jolles, MD

Pediatrics Physician in Hanover, MA · enumerated 2005.

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

National Provider Identifier

1235120601

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Registry record

Entity type Individual (Type 1)

Name Dr. Jon R Jolles

Credential MD

Sex Male

Practice address 51 Mill St, Building E - 17, Hanover, MA, 02339

Phone (781) 826-2131

Fax (781) 826-4513

Enumeration date Nov 3, 2005

Last updated in NPPES Oct 3, 2024

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 45558 (MA) 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
721287	Other	-	TUFTS
JOJ08024	Other	MA	BCBS
0194069	Medicaid	MA	-
3552812	Other	-	CIGNA
1200529	Other	-	UNITED
20603	Other	MA	HPHC

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

Is NPI 1235120601 active?

Yes, as of the latest NPPES snapshot, NPI 1235120601 is active (record last updated 2024-10-03).

How do I verify Jon Jolles's NPI record?

Cross-check NPI 1235120601 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-03.