Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cynthia E Casteel, M.D.

Pediatrics Physician in San Antonio, TX · enumerated 2006.

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

National Provider Identifier

1891740247

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Cynthia E Casteel

Credential M.D.

Sex Female

Practice address 2515 Castroville Rd, Ste 103, San Antonio, TX, 78237

Phone (210) 433-0366

Fax (210) 433-2622

Enumeration date May 24, 2006

Last updated in NPPES May 8, 2013

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License G7751 (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
2880514005	Other	MI	CIGNA
104447704	Medicaid	MI	-
12-20019	Other	MI	PHP OF SOUTH MICHIGAN
111757	Other	MI	PREFERRED CHOICES
35-0-38-0137-1	Other	MI	BLUE CROSS BLUE SHIELD
4333430	Other	MI	AETNA

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 1891740247 active?

Yes, as of the latest NPPES snapshot, NPI 1891740247 is active (record last updated 2013-05-08).

How do I verify Cynthia Casteel's NPI record?

Cross-check NPI 1891740247 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-08.