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John Anzalone, DO
NPI 1861481558 · General Practice Physician · O Fallon, MO
John Anzalone, DO is a General Practice Physician provider in O Fallon, MO (NPI 1861481558).
Provider details
- NPI number
- 1861481558
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- R7830 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 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
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
1055 E Terra Ln
O Fallon, MO 63366-2750
Phone: (636) 272-6161
Fax: (636) 240-9188
Street-level locationGet directions
Mailing address
1055 E Terra Ln
O Fallon, MO 63366-2750
Registry dates
- Enumerated
- 2005-10-17
- Last updated
- 2009-12-23
Frequently asked questions
- What is John Anzalone's NPI number?
- John Anzalone's National Provider Identifier (NPI) is 1861481558, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Anzalone's specialty?
- John Anzalone is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is John Anzalone located?
- John Anzalone's practice location on file with NPPES is 1055 E Terra Ln, O Fallon, MO 63366-2750.
- What is John Anzalone's phone number?
- The practice phone number listed in the NPPES registry for John Anzalone is (636) 272-6161.
- Is John Anzalone's NPI active?
- Yes — John Anzalone's NPI (1861481558) is active in the NPPES registry as of the last update on 2009-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.