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

Dr. James D Singleton, MD

Rheumatology Physician in Highlands Ranch, CO · enumerated 2006.

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

National Provider Identifier

1104881226

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Registry record

Entity type Individual (Type 1)

Name Dr. James D Singleton

Credential MD

Sex Male

Practice address Highlands Ranch, CO, 80129

Phone (303) 788-8355

Fax (303) 788-4448

Enumeration date Apr 20, 2006

Last updated in NPPES Apr 21, 2011

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

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 28405 (CO) 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
84143817901	Other	CO	PACIFICARE OF COLORADO
0965432	Other	CO	AETNA HEALTH CARE
SI83371	Other	CO	ANTHEM BC/BS
01284058	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 James Singleton's NPI record?

Cross-check NPI 1104881226 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1104881226 active?

Yes, as of the latest NPPES snapshot, NPI 1104881226 is active (record last updated 2011-04-21).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-21.