Matthew Posen, DO
NPI 1295485837 · Internal Medicine Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Posen, DO is a Internal Medicine Physician provider in Oak Lawn, IL (NPI 1295485837).
Provider details
- NPI number
- 1295485837
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036172402 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 45 | 27 |
| Amlodipine Besylate | 28 | 14 |
| Spironolactone | 18 | — |
| Furosemide | 18 | — |
| Gabapentin | 17 | — |
| Tamsulosin Hcl | 16 | — |
| Apixabanbrand: Eliquis |
Practice location
Mailing address
Additional practice locations (1)
- 4220 W 95th St Ste 200Oak Lawn, IL 60453-3072Phone: (708) 398-0287
Registry dates
- Enumerated
- 2022-03-26
- Last updated
- 2025-07-28
- Certified
- 2025-07-28
Frequently asked questions
- What is Matthew Posen's NPI number?
- Matthew Posen's National Provider Identifier (NPI) is 1295485837, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Posen's specialty?
- Matthew Posen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Posen located?
- Matthew Posen's practice location on file with NPPES is 4440 W 95th St, Oak Lawn, IL 60453-2600.
- What is Matthew Posen's phone number?
- The practice phone number listed in the NPPES registry for Matthew Posen is (708) 684-4393.
- Does Matthew Posen accept Medicare?
- Matthew Posen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Posen's NPI active?
- Yes — Matthew Posen's NPI (1295485837) is active in the NPPES registry as of the last update on 2025-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.