Gregory Hanissian, MD
NPI 1033216148 · Allergy & Immunology Physician · Germantown, TN
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Hanissian, MD is a Allergy & Immunology Physician provider in Germantown, TN (NPI 1033216148).
Provider details
- NPI number
- 1033216148
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25121 (TN)
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
19 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
7,450 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 4,703 | $3 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 1,300 | $13 |
| Professional Service for Multiple Injections of Allergen95117 | 787 | $11 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 208 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $117 |
| 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 |
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) | Beneficiaries |
|---|---|---|
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 34 | 11 |
| Montelukast Sodium | 31 | 11 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 29 | 16 |
| Azelastine Hcl | 27 | 16 |
| Dupilumabbrand: Dupixent Pen | 26 | — |
| Dupilumabbrand: Dupixent Syringe | 24 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,749 across 82 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
- 2006-09-20
- Last updated
- 2008-01-11
Frequently asked questions
- What is Gregory Hanissian's NPI number?
- Gregory Hanissian's National Provider Identifier (NPI) is 1033216148, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hanissian's specialty?
- Gregory Hanissian is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Hanissian located?
- Gregory Hanissian's practice location on file with NPPES is 2101 Merchants Row, Germantown, TN 38138-3862.
- What is Gregory Hanissian's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hanissian is (901) 751-9696.
- Does Gregory Hanissian accept Medicare?
- Gregory Hanissian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Hanissian's NPI active?
- Yes — Gregory Hanissian's NPI (1033216148) is active in the NPPES registry as of the last update on 2008-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.