Greg Denenberg, MD
NPI 1235185299 · Internal Medicine Physician · Skokie, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Greg Denenberg, MD is a Internal Medicine Physician provider in Skokie, IL (NPI 1235185299).
Provider details
- NPI number
- 1235185299
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036-098295 (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
3,839 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 | 1,198 | $92 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 613 | $15 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 485 | $20 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 476 | $137 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 276 | $135 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 158 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 782 | 203 |
| Losartan Potassium | 579 | 143 |
| Amlodipine Besylate | 540 | 137 |
| Levothyroxine Sodium | 539 | 138 |
| Simvastatin | 498 | 129 |
| Rosuvastatin Calcium | 386 | 102 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,483 across 181 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
- 2006-05-25
- Last updated
- 2008-05-19
Frequently asked questions
- What is Greg Denenberg's NPI number?
- Greg Denenberg's National Provider Identifier (NPI) is 1235185299, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Denenberg's specialty?
- Greg Denenberg is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Greg Denenberg located?
- Greg Denenberg's practice location on file with NPPES is 4905 Old Orchard Ctr, Skokie, IL 60077-1425.
- What is Greg Denenberg's phone number?
- The practice phone number listed in the NPPES registry for Greg Denenberg is (847) 679-6707.
- Does Greg Denenberg accept Medicare?
- Greg Denenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Greg Denenberg's NPI active?
- Yes — Greg Denenberg's NPI (1235185299) is active in the NPPES registry as of the last update on 2008-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.