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William Mcmillan, M.D.
NPI 1558454975 · Otolaryngology Physician · Ottumwa, IA
William Mcmillan, M.D. is a Otolaryngology Physician provider in Ottumwa, IA (NPI 1558454975).
Provider details
- NPI number
- 1558454975
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20710 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
1005 Pennsylvania Ave
Ottumwa, IA 52501-6413
Phone: (641) 683-1900
Fax: (641) 683-3830
Street-level locationGet directions
Mailing address
1005 Pennsylvania Ave
Ottumwa, IA 52501-6413
Registry dates
- Enumerated
- 2006-09-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Mcmillan's NPI number?
- William Mcmillan's National Provider Identifier (NPI) is 1558454975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mcmillan's specialty?
- William Mcmillan is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is William Mcmillan located?
- William Mcmillan's practice location on file with NPPES is 1005 Pennsylvania Ave, Ottumwa, IA 52501-6413.
- What is William Mcmillan's phone number?
- The practice phone number listed in the NPPES registry for William Mcmillan is (641) 683-1900.
- Is William Mcmillan's NPI active?
- Yes — William Mcmillan's NPI (1558454975) 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.