Heather Williamson, DO
NPI 1700880358 · Family Medicine Physician · O Fallon, MO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Heather Williamson, DO is a Family Medicine Physician provider in O Fallon, MO (NPI 1700880358).
Provider details
- NPI number
- 1700880358
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 2001026591 (MO)
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
21 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
- 2005-06-10
- Last updated
- 2013-03-13
Frequently asked questions
- What is Heather Williamson's NPI number?
- Heather Williamson's National Provider Identifier (NPI) is 1700880358, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Heather Williamson's specialty?
- Heather Williamson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Heather Williamson located?
- Heather Williamson's practice location on file with NPPES is 3449 Pheasant Meadow Dr, O Fallon, MO 63368-7364.
- What is Heather Williamson's phone number?
- The practice phone number listed in the NPPES registry for Heather Williamson is (636) 379-4140.
- Does Heather Williamson accept Medicare?
- Heather Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Heather Williamson's NPI active?
- Yes — Heather Williamson's NPI (1700880358) is active in the NPPES registry as of the last update on 2013-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.