Gregory Harter, MD
NPI 1134157415 · Family Medicine Physician · Waterloo, IA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Harter, MD is a Family Medicine Physician provider in Waterloo, IA (NPI 1134157415).
Provider details
- NPI number
- 1134157415
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 26144 (IA)
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,861 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,129 | $118 |
| 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 | 574 | $15 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 528 | $58 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 294 | $13 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 265 | $9 |
| Hemoglobin A1c Level |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 155 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 469 | 110 |
| Levothyroxine Sodium | 466 | 106 |
| Atorvastatin Calcium | 447 | 107 |
| Amlodipine Besylate | 398 | 89 |
| Rosuvastatin Calcium | 366 | 83 |
| Omeprazole | 353 | 81 |
| Escitalopram Oxalate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,320 across 137 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
Additional practice locations (2)
- 2710 Saint Francis DrSuite 210Waterloo, IA 50702-5619Phone: (319) 272-5000Fax: (319) 272-1535
- 220 W Ridgeway Ave Ste 106Waterloo, IA 50701-4200Phone: (319) 232-0555
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2022-02-04
- Certified
- 2022-02-04
Frequently asked questions
- What is Gregory Harter's NPI number?
- Gregory Harter's National Provider Identifier (NPI) is 1134157415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Harter's specialty?
- Gregory Harter is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Harter located?
- Gregory Harter's practice location on file with NPPES is 125 E Tower Park Dr, Waterloo, IA 50701-9330.
- What is Gregory Harter's phone number?
- The practice phone number listed in the NPPES registry for Gregory Harter is (319) 232-0555.
- Does Gregory Harter accept Medicare?
- Gregory Harter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Harter's NPI active?
- Yes — Gregory Harter's NPI (1134157415) is active in the NPPES registry as of the last update on 2022-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.