NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karla Castro-Frenzel, M.D.

Pediatric Anesthesiology Physician in Orlando, FL · enumerated 2005 · practices at Anesthesiologists of Greater Orlando Inc.

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

National Provider Identifier

1245228378

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Karla Castro-Frenzel
Credential M.D.
Sex Female
Practice address 52 Underwood St, Orlando, FL, 32806
Phone (321) 527-7424
Fax (321) 843-2196
Enumeration date Oct 12, 2005
Last updated in NPPES Jul 1, 2025

Taxonomy & licenses

207LP3000X Pediatric Anesthesiology Physician Allopathic & Osteopathic Physicians · License ME122251 (FL) Primary
207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 236556 (NY) Secondary
207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License ME122251 (FL) 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
02669529 Medicaid NY -
014176000 Medicaid FL -

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 is the NPI number for Karla Castro-Frenzel?
The National Provider Identifier (NPI) for Karla Castro-Frenzel is 1245228378, a Type 1 (individual) record in the CMS NPPES registry.
Where does Karla Castro-Frenzel practice?
The practice location on file with NPPES is in Orlando, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-01.