Nancy Knudsen, MD
NPI 1003826025 · Internal Medicine Physician · Amsterdam, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Knudsen, MD is a Internal Medicine Physician provider in Amsterdam, NY (NPI 1003826025).
Provider details
- NPI number
- 1003826025
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 146433-1 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-08-09
- Last updated
- 2007-08-29
Frequently asked questions
- What is Nancy Knudsen's NPI number?
- Nancy Knudsen's National Provider Identifier (NPI) is 1003826025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Knudsen's specialty?
- Nancy Knudsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Knudsen located?
- Nancy Knudsen's practice location on file with NPPES is 427 Guy Park Ave, Amsterdam, NY 12010.
- What is Nancy Knudsen's phone number?
- The practice phone number listed in the NPPES registry for Nancy Knudsen is (518) 842-1900.
- Does Nancy Knudsen accept Medicare?
- Nancy Knudsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Knudsen's NPI active?
- Yes — Nancy Knudsen's NPI (1003826025) is active in the NPPES registry as of the last update on 2007-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.