Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Frederick Karrer, MD

Pediatric Surgery Physician in Aurora, CO · enumerated 2006.

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

National Provider Identifier

1659465987

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Frederick Karrer

Credential MD

Sex Male

Practice address 13123 E 16th Ave, Aurora, CO, 80045

Phone (720) 777-1234

Enumeration date Oct 3, 2006

Last updated in NPPES Nov 17, 2018

Taxonomy & licenses

204F00000X Transplant Surgery Physician Allopathic & Osteopathic Physicians · License 25905 (CO) Secondary

2086S0120X Pediatric Surgery Physician Allopathic & Osteopathic Physicians · License DR.0025905 (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
01259050	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

Where does Frederick Karrer practice?

The practice location on file with NPPES is in Aurora, CO. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Frederick Karrer?

The National Provider Identifier (NPI) for Frederick Karrer is 1659465987, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Janel Saunders Pediatric Nurse Practitioner · Aurora, CO NPI 1316940448 Cheryl Cavallaro Acute Care Nurse Practitioner · Aurora, CO NPI 1801890447 Grace Fan Pediatric Emergency Medicine (Pediatrics) Physician · Aurora, CO NPI 1871598276 Stephen Maher Pediatric Ophthalmology and Strabismus Specialist Physician · Aurora, CO NPI 1578561726 Robert Enzenauer Pediatric Ophthalmology and Strabismus Specialist Physician · Aurora, CO NPI 1154313419 Katherine Krueck Pediatric Emergency Medicine (Pediatrics) Physician · Aurora, CO NPI 1568457273 William Campbell Developmental - Behavioral Pediatrics Physician · Aurora, CO NPI 1497740039 Carey Seatter Physician Assistant · Aurora, CO NPI 1740278068

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-17.