Julia Williams, M.D.
NPI 1659427680 · Family Medicine Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Julia Williams, M.D. is a Family Medicine Physician provider in Phoenix, AZ (NPI 1659427680).
Provider details
- NPI number
- 1659427680
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 22241 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
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
Additional practice locations (1)
- 1200 N Beaver StFlagstaff, AZ 86001-3118Phone: (928) 380-0476Fax: (928) 214-3882
Registry dates
- Enumerated
- 2007-01-25
- Last updated
- 2018-03-17
Frequently asked questions
- What is Julia Williams's NPI number?
- Julia Williams's National Provider Identifier (NPI) is 1659427680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julia Williams's specialty?
- Julia Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Julia Williams located?
- Julia Williams's practice location on file with NPPES is 3411 N 5th Ave Ste 209, Phoenix, AZ 85013-3812.
- What is Julia Williams's phone number?
- The practice phone number listed in the NPPES registry for Julia Williams is (602) 789-0344.
- Does Julia Williams accept Medicare?
- Julia Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Julia Williams's NPI active?
- Yes — Julia Williams's NPI (1659427680) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.