Don Harden, MD
NPI 1144380577 · Sleep Medicine (Internal Medicine) Physician · Fitchburg, WI
Don Harden, MD is a Sleep Medicine (Internal Medicine) Physician provider in Fitchburg, WI (NPI 1144380577).
Provider details
- NPI number
- 1144380577
- Entity type
- Individual
- Primary specialty
- Sleep Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 48535-20 (WI)
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
- 2006-12-08
- Last updated
- 2023-03-07
Frequently asked questions
- What is Don Harden's NPI number?
- Don Harden's National Provider Identifier (NPI) is 1144380577, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Don Harden's specialty?
- Don Harden is listed in the NPPES registry with a primary specialty of Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Don Harden located?
- Don Harden's practice location on file with NPPES is 2844 Index Rd, Fitchburg, WI 53713-3117.
- What is Don Harden's phone number?
- The practice phone number listed in the NPPES registry for Don Harden is (608) 229-7979.
- Is Don Harden's NPI active?
- Yes — Don Harden's NPI (1144380577) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.