Mackenzie Williams, FNP-BC
NPI 1629581764 · Family Nurse Practitioner · San Diego, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mackenzie Williams, FNP-BC is a Family Nurse Practitioner provider in San Diego, CA (NPI 1629581764).
Provider details
- NPI number
- 1629581764
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 95007637 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
251 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 | 73 | $117 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 63 | $151 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 25 | $50 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 25 | $13 |
| Detection Test By Nucleic Acid for Multiple Types Influenza Virus87502 | 24 | $94 |
| Detection Test By Nucleic Acid for Respiratory Syncytial Virus, Amplified Probe Technique87634 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 25 | 25 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 19 | 16 |
| Azithromycin | 18 | 18 |
| Ibuprofen | 16 | 16 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 | 15 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 1010 W La Veta Ave Ste 755Orange, CA 92868-4306Phone: (714) 543-8911
Registry dates
- Enumerated
- 2017-11-11
- Last updated
- 2022-07-11
- Certified
- 2022-07-11
Frequently asked questions
- What is Mackenzie Williams's NPI number?
- Mackenzie Williams's National Provider Identifier (NPI) is 1629581764, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mackenzie Williams's specialty?
- Mackenzie Williams is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mackenzie Williams located?
- Mackenzie Williams's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Mackenzie Williams's phone number?
- The practice phone number listed in the NPPES registry for Mackenzie Williams is (800) 926-8273.
- Does Mackenzie Williams accept Medicare?
- Mackenzie Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mackenzie Williams's NPI active?
- Yes — Mackenzie Williams's NPI (1629581764) is active in the NPPES registry as of the last update on 2022-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.