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

Dr. John Calvin Chatlos Jr., MD

Psychiatry Physician in Holmdel, NJ · enumerated 2005.

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

National Provider Identifier

1497752695

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Registry record

Entity type Individual (Type 1)

Name Dr. John Calvin Chatlos Jr.

Credential MD

Sex Male

Practice address Holmdel, NJ, 07733

Phone (732) 834-0368

Fax (732) 834-9891

Enumeration date Jul 1, 2005

Last updated in NPPES Apr 18, 2016

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

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MA46262 (NJ) Primary

2084P0802X Addiction Psychiatry Physician Allopathic & Osteopathic Physicians · License MA 46262 (NJ) Secondary

2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License MA 46262 (NJ) Secondary

2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License MA 46262 (NJ) Secondary

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
372324	Other	NJ	MEDICARE PTAN
2508206	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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is John Chatlos?

John Chatlos is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-18.