Patrick Lay, MD
NPI 1639238405 · Internal Medicine Physician · Skokie, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Patrick Lay, MD is a Internal Medicine Physician provider in Skokie, IL (NPI 1639238405).
Provider details
- NPI number
- 1639238405
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-092840 (IL)
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
19 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
718 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 | 182 | $102 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 175 | $137 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 151 | $152 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 102 | $71 |
| 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 | 53 | $17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 797 | 237 |
| Amlodipine Besylate | 548 | 159 |
| Losartan Potassium | 457 | 130 |
| Metformin Hcl | 348 | 100 |
| Levothyroxine Sodium | 191 | 54 |
| Tamsulosin Hcl | 181 | 59 |
| Simvastatin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-07
- Last updated
- 2020-10-06
- Certified
- 2020-10-06
Frequently asked questions
- What is Patrick Lay's NPI number?
- Patrick Lay's National Provider Identifier (NPI) is 1639238405, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patrick Lay's specialty?
- Patrick Lay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Patrick Lay located?
- Patrick Lay's practice location on file with NPPES is 9977 Woods Dr, Skokie, IL 60077-1057.
- What is Patrick Lay's phone number?
- The practice phone number listed in the NPPES registry for Patrick Lay is (847) 663-8350.
- Does Patrick Lay accept Medicare?
- Patrick Lay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Patrick Lay's NPI active?
- Yes — Patrick Lay's NPI (1639238405) is active in the NPPES registry as of the last update on 2020-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.