Karl Diehn, M.D.
NPI 1467466623 · Specialist · Baltimore, MD
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Diehn, M.D. is a Specialist provider in Baltimore, MD (NPI 1467466623).
Provider details
- NPI number
- 1467466623
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0019874 (MD)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2013-12-13
Frequently asked questions
- What is Karl Diehn's NPI number?
- Karl Diehn's National Provider Identifier (NPI) is 1467466623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Diehn's specialty?
- Karl Diehn is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Karl Diehn located?
- Karl Diehn's practice location on file with NPPES is 6565 N Charles St, Baltimore, MD 21204-6800.
- What is Karl Diehn's phone number?
- The practice phone number listed in the NPPES registry for Karl Diehn is (410) 821-5151.
- Does Karl Diehn accept Medicare?
- Karl Diehn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Diehn's NPI active?
- Yes — Karl Diehn's NPI (1467466623) is active in the NPPES registry as of the last update on 2013-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.