William Martinez, MD
NPI 1144212382 · Family Medicine Physician · Libertyville, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Martinez, MD is a Family Medicine Physician provider in Libertyville, IL (NPI 1144212382).
Provider details
- NPI number
- 1144212382
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036099225 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
287 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 57 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 57 | $131 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 44 | $133 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 42 | $9 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 42 | $19 |
| Urinalysis, Manual Test81002 | 32 | $3 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 100 | 31 |
| Metformin Hcl | 85 | 23 |
| Metformin Hclbrand: Metformin Hcl Er | 78 | 27 |
| Pravastatin Sodium | 72 | 19 |
| Rosuvastatin Calcium | 72 | 26 |
| Amlodipine Besylate | 70 | 23 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,283 across 41 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-15
- Last updated
- 2021-12-09
- Certified
- 2021-12-09
Frequently asked questions
- What is William Martinez's NPI number?
- William Martinez's National Provider Identifier (NPI) is 1144212382, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Martinez's specialty?
- William Martinez is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Martinez located?
- William Martinez's practice location on file with NPPES is 1870 W Winchester Rd, Libertyville, IL 60048-5358.
- What is William Martinez's phone number?
- The practice phone number listed in the NPPES registry for William Martinez is (847) 996-0700.
- Does William Martinez accept Medicare?
- William Martinez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Martinez's NPI active?
- Yes — William Martinez's NPI (1144212382) is active in the NPPES registry as of the last update on 2021-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.