Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John E Carlson, MD

Geriatric Medicine (Internal Medicine) Physician in Georgetown, TX · enumerated 2005 · practices at Baylor Scott & White Health Enterprises, Inc..

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

National Provider Identifier

1659352680

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Registry record

Entity type Individual (Type 1)

Name Mr. John E Carlson

Credential MD

Sex Male

Practice address 4945 Williams Dr, Georgetown, TX, 78633

Phone (512) 819-0500

Enumeration date Nov 8, 2005

Last updated in NPPES Jan 18, 2022

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 22442 (SC) Secondary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License J4742 (TX) 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
510446195	Other	SC	BCBS OF SC
224420	Medicaid	SC	-
9199865	Other	-	GHI

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

What specialty is John Carlson?

John Carlson is registered in NPPES with the primary taxonomy of Geriatric Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-18.