Gregory Marolf, MD
NPI 1336258326 · Family Medicine Physician · Largo, FL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Marolf, MD is a Family Medicine Physician provider in Largo, FL (NPI 1336258326).
Provider details
- NPI number
- 1336258326
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME76645 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,645 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 512 | $88 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 320 | $16 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 263 | $109 |
| Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811 | 207 | $41 |
| Automated Urinalysis Test81003 | 123 | $2 |
| X-Ray of Chest, 2 Views71046 | 44 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methylprednisolone | 305 | 301 |
| Doxycycline Hyclate | 302 | 295 |
| Cephalexin | 196 | 190 |
| Amoxicillin | 148 | 147 |
| Diclofenac Sodium | 80 | 78 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 76 | 74 |
| Azithromycin | 61 | 59 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2021-03-24
- Certified
- 2021-03-24
Frequently asked questions
- What is Gregory Marolf's NPI number?
- Gregory Marolf's National Provider Identifier (NPI) is 1336258326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Marolf's specialty?
- Gregory Marolf is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Marolf located?
- Gregory Marolf's practice location on file with NPPES is 13670 Walsingham Rd, Largo, FL 33774-3532.
- What is Gregory Marolf's phone number?
- The practice phone number listed in the NPPES registry for Gregory Marolf is (727) 593-9848.
- Does Gregory Marolf accept Medicare?
- Gregory Marolf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Marolf's NPI active?
- Yes — Gregory Marolf's NPI (1336258326) is active in the NPPES registry as of the last update on 2021-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.