Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chester J Dreiman, MD

Internal Medicine Physician in Boulder, CO · enumerated 2006.

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

National Provider Identifier

1013983196

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Registry record

Entity type Individual (Type 1)

Name Chester J Dreiman

Credential MD

Sex Male

Practice address 2562 Briarwood Dr, Boulder, CO, 80305

Phone (303) 501-2195

Enumeration date Feb 27, 2006

Last updated in NPPES Apr 26, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 33041 (CO) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036164434 (IL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD2023-1656 (NM) 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
31088546	Medicaid	NM	-
200088620A	Medicaid	OK	-
200389280A	Medicaid	KS	-
01330414	Medicaid	CO	-

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

How do I verify Chester Dreiman's NPI record?

Cross-check NPI 1013983196 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1013983196 active?

Yes, as of the latest NPPES snapshot, NPI 1013983196 is active (record last updated 2024-04-26).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-26.