Dennis Park, DO
NPI 1639220445 · Internal Medicine Physician · Oakbrook Terrace, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Park, DO is a Internal Medicine Physician provider in Oakbrook Terrace, IL (NPI 1639220445).
Provider details
- NPI number
- 1639220445
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 602 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,132 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) |
|---|---|---|
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 459 | $78 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 365 | $130 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 69 | $55 |
| Physician Or Allowed Practitioner Re-Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians aG0179 | 62 | $43 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 59 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 116 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 361 | 53 |
| Atorvastatin Calcium | 270 | 55 |
| Amlodipine Besylate | 248 | 43 |
| Montelukast Sodium | 228 | 49 |
| Gabapentin | 217 | 45 |
| Sertraline Hcl | 201 | 27 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-16
- Last updated
- 2021-03-17
- Certified
- 2021-03-17
Frequently asked questions
- What is Dennis Park's NPI number?
- Dennis Park's National Provider Identifier (NPI) is 1639220445, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Park's specialty?
- Dennis Park is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dennis Park located?
- Dennis Park's practice location on file with NPPES is 2 Transam Plaza Dr Ste 410, Oakbrook Terrace, IL 60181-4290.
- What is Dennis Park's phone number?
- The practice phone number listed in the NPPES registry for Dennis Park is (866) 259-1631.
- Does Dennis Park accept Medicare?
- Dennis Park is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Park's NPI active?
- Yes — Dennis Park's NPI (1639220445) is active in the NPPES registry as of the last update on 2021-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.