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

Karl R. Friedmann, M.D.

Family Medicine Physician in Old Lyme, CT · enumerated 2010.

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

National Provider Identifier

1285956987

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Karl R. Friedmann

Credential M.D.

Sex Male

Practice address Old Lyme, CT, 06371

Phone (860) 434-2783

Fax (860) 434-2783

Enumeration date Feb 22, 2010

Last updated in NPPES Feb 22, 2010

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 010369 (CT) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 2409 (VT) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Karl Friedmann practice?

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

What is the NPI number for Karl Friedmann?

The National Provider Identifier (NPI) for Karl Friedmann is 1285956987, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-22.