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William Knaack, M.D.
NPI 1982666517 · Internal Medicine Physician · Durham, NC
William Knaack, M.D. is a Internal Medicine Physician provider in Durham, NC (NPI 1982666517).
Provider details
- NPI number
- 1982666517
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(84/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
83% 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
508 Fulton St
Durham, NC 27705-3875
Phone: (919) 286-0411
Street-level locationGet directions
Mailing address
106 Grazing Meadows Ct
Apex, NC 27502-3870
Registry dates
- Enumerated
- 2006-04-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Knaack's NPI number?
- William Knaack's National Provider Identifier (NPI) is 1982666517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Knaack's specialty?
- William Knaack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Knaack located?
- William Knaack's practice location on file with NPPES is 508 Fulton St, Durham, NC 27705-3875.
- What is William Knaack's phone number?
- The practice phone number listed in the NPPES registry for William Knaack is (919) 286-0411.
- Is William Knaack's NPI active?
- Yes — William Knaack's NPI (1982666517) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.