Jessica Williams, M.D.
NPI 1639513047 · Family Medicine Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jessica Williams, M.D. is a Family Medicine Physician provider in Phoenix, AZ (NPI 1639513047).
Provider details
- NPI number
- 1639513047
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 51971 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
702 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 339 | $122 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 140 | $6 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 129 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 67 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $88 |
Typical Medicare-allowed amounts for these services range $6–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 285 | 78 |
| Levothyroxine Sodium | 229 | 68 |
| Lisinopril | 193 | 53 |
| Losartan Potassium | 172 | 51 |
| Amlodipine Besylate | 132 | 37 |
| Pantoprazole Sodium | 123 | 36 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-29
- Last updated
- 2016-12-07
Frequently asked questions
- What is Jessica Williams's NPI number?
- Jessica Williams's National Provider Identifier (NPI) is 1639513047, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jessica Williams's specialty?
- Jessica Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jessica Williams located?
- Jessica Williams's practice location on file with NPPES is 19636 N 27th Ave, Phoenix, AZ 85027-4013.
- What is Jessica Williams's phone number?
- The practice phone number listed in the NPPES registry for Jessica Williams is (623) 780-1999.
- Does Jessica Williams accept Medicare?
- Jessica Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jessica Williams's NPI active?
- Yes — Jessica Williams's NPI (1639513047) is active in the NPPES registry as of the last update on 2016-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.