Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Zechariah Tanner Dillingham, M.D.

Internal Medicine Physician in Natick, MA · enumerated 2016.

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

National Provider Identifier

1144673823

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Registry record

Entity type Individual (Type 1)

Name Dr. Zechariah Tanner Dillingham

Credential M.D.

Sex Male

Practice address 10 General Greene Ave, Bldg 42, Military Nutrition Division, Natick, MA, 01760

Phone (508) 206-2458

Enumeration date Jul 19, 2016

Last updated in NPPES Feb 27, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 30897 (NE) Primary

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

Is NPI 1144673823 active?

Yes, as of the latest NPPES snapshot, NPI 1144673823 is active (record last updated 2023-02-27).

How do I verify Zechariah Dillingham's NPI record?

Cross-check NPI 1144673823 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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Kristin Joltes Physician Assistant · Natick, MA NPI 1376550681

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-27.