Gregory Haack, MD
NPI 1235125261 · Internal Medicine Physician · Wright Patterson Afb, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Haack, MD is a Internal Medicine Physician provider in Wright Patterson Afb, OH (NPI 1235125261).
Provider details
- NPI number
- 1235125261
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01056726A (IN)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
219 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 97 | $75 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 49 | $121 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 25 | $124 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $146 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 13 | $76 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Gabapentin | 38 |
| Furosemide | 26 |
| Duloxetine Hcl | 24 |
| Lisinopril | 18 |
| Amlodipine Besylate | 17 |
| Omeprazole | 17 |
| Apixabanbrand: Eliquis | 17 |
| Metoprolol Tartrate | 15 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$95 across 1 record (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
Additional practice locations (1)
- 5678 Far Hills AveDayton, OH 45429-2206Phone: (937) 245-7200
Registry dates
- Enumerated
- 2005-09-26
- Last updated
- 2024-04-24
- Certified
- 2024-04-24
Frequently asked questions
- What is Gregory Haack's NPI number?
- Gregory Haack's National Provider Identifier (NPI) is 1235125261, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Haack's specialty?
- Gregory Haack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Haack located?
- Gregory Haack's practice location on file with NPPES is 4881 Sugar Maple Dr, Wright Patterson Afb, OH 45433-5529.
- What is Gregory Haack's phone number?
- The practice phone number listed in the NPPES registry for Gregory Haack is (937) 257-9926.
- Does Gregory Haack accept Medicare?
- Gregory Haack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Haack's NPI active?
- Yes — Gregory Haack's NPI (1235125261) is active in the NPPES registry as of the last update on 2024-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.