Diane Witkowski
NPI 1720483456 · Nurse Practitioner · Frederick, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Witkowski is a Nurse Practitioner provider in Frederick, MD (NPI 1720483456).
Provider details
- NPI number
- 1720483456
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- R186991 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
- 2014-10-23
- Last updated
- 2025-06-13
- Certified
- 2025-06-13
Frequently asked questions
- What is Diane Witkowski's NPI number?
- Diane Witkowski's National Provider Identifier (NPI) is 1720483456, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Witkowski's specialty?
- Diane Witkowski is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diane Witkowski located?
- Diane Witkowski's practice location on file with NPPES is 617 W Patrick St, Frederick, MD 21701-4027.
- What is Diane Witkowski's phone number?
- The practice phone number listed in the NPPES registry for Diane Witkowski is (240) 405-8084.
- Does Diane Witkowski accept Medicare?
- Diane Witkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Witkowski's NPI active?
- Yes — Diane Witkowski's NPI (1720483456) is active in the NPPES registry as of the last update on 2025-06-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.