Gregory Manzullo, M.D.
NPI 1811009558 · Hematology & Oncology Physician · Toms River, NJ
Enrolled with Medicare as Practitioner - Hematology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Manzullo, M.D. is a Hematology & Oncology Physician provider in Toms River, NJ (NPI 1811009558).
Provider details
- NPI number
- 1811009558
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25MA05812800 (NJ)
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
3,269 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 | 2,139 | $141 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 651 | $63 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 354 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 45 | $99 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 21 | $244 |
| Aspiration of Bone Marrow Sample for Diagnosis38220 | 16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Hydroxyurea | 26 |
| Letrozole | 24 |
| Ixazomib Citratebrand: Ninlaro | 22 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 16 |
| Zolpidem Tartrate | 16 |
| Warfarin Sodium | 15 |
| Imatinib Mesylate | 14 |
| Lorazepam | 14 |
| Ruxolitinib Phosphatebrand: Jakafi | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,319 across 65 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
- 2006-08-31
- Last updated
- 2010-06-24
Frequently asked questions
- What is Gregory Manzullo's NPI number?
- Gregory Manzullo's National Provider Identifier (NPI) is 1811009558, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Manzullo's specialty?
- Gregory Manzullo is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Manzullo located?
- Gregory Manzullo's practice location on file with NPPES is 100 Commons Way, Toms River, NJ 08755-6426.
- What is Gregory Manzullo's phone number?
- The practice phone number listed in the NPPES registry for Gregory Manzullo is (732) 818-7561.
- Does Gregory Manzullo accept Medicare?
- Gregory Manzullo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Manzullo's NPI active?
- Yes — Gregory Manzullo's NPI (1811009558) is active in the NPPES registry as of the last update on 2010-06-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.