Dr. Gregg Gerard Marella, MD
- Medicare services, 2024
- 2,039
- Medicare patients, 2024
- 293
- Part D claims, 2024
- 3,312
- MIPS score, 2024
- 20
- Hospital affiliations
- 2
- Practice address
- 19 E Main St, Mendham, NJ 07945
- Practice phone
- Call (973) 543-6505
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mendham Medical Practice
Mendham, New Jersey
Find Dr. Marella's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregg Gerard Marella is an internist in Mendham, New Jersey
Dr. Marella practices at Mendham Medical Practice in Mendham, New Jersey.
Dr. Marella's NPI, 1922116326, was assigned on August 26, 2006. Dr. Marella graduated from Pennsylvania State University College of Medicine in 1993. Dr. Marella holds New Jersey license MA64502.
- NPI
- 1922116326NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840215851
- NPI enumeration date
- August 26, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (973) 543-6505
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregg Gerard Marella practices at Mendham Medical Practice in Mendham, New Jersey
Dr. Marella's primary practice is Mendham Medical Practice, at 19 E Main St, Mendham, NJ 07945 in Morris County. The practice phone is (973) 543-6505.
- Mendham Medical Practice19 E Main St, Mendham, NJ 07945 · Morris CountyPhone(973) 543-6505
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregg Gerard Marella is affiliated with 6 sites of care
Dr. Marella's primary practice is Mendham Medical Practice in Mendham, New Jersey. Dr. Marella is also affiliated with Morristown Medical Center. Dmand AI also links Dr. Marella to 1 more hospital, 1 physician office, 1 home health agency and 1 hospice, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregg Gerard Marella's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marella practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mendham Medical Practice | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregg Gerard Marella is one of 4,226 internists in New Jersey
Internal medicine is Dr. Marella's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Marella is licensed in New Jersey.
Specialties and state licenses
- Internal medicine, New JerseyPrimary
Internists near Dr. Marella
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregg Gerard Marella billed Medicare for 2,039 services in 2024
CMS data shows 2,039 Medicare services from Dr. Marella across 21 procedure codes in 2024, for 293 Medicare patients. Medicare paid $112,867 for them. Every service was in an office.
Dr. Marella's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9462024: 9262%
- Other services
- 2023: 2452024: 586139%
- Surgery
- 2023: 2922024: 3189%
- Tests and treatments
- 2023: 1662024: 1681%
- Lab and pathology
- 2023: 362024: 4114%
Dr. Marella compared with the New Jersey median for internists, 2024
- Dr. Marella
- New Jersey median
- Medicare services
- 2,039vs 7232.8 times
- Medicare patients
- 293vs 23127% above
- Part D claims
- 2,617vs 8303.2 times
Medians across 4,086 internists in New Jersey with Dmand AI profiles that report each measure.
Dr. Marella's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Marella?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marella and other internists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregg Gerard Marella treated 293 Medicare patients in 2024, average age 78
CMS counts 293 Medicare patients who saw Dr. Marella in 2024. The largest group is 75 to 84, with 121 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 8% are also on Medicaid. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marella's median patient age at 72, with 44% women.
Dr. Marella's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marella's Medicare patients by sex, 2024
- Women14650%
- Men14750%
Chronic conditions among Dr. Marella's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis40%
- Diabetes24%
- Ischemic heart disease19%
- Anxiety16%
- Atrial fibrillation16%
- Cancer15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marella's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women44%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregg Gerard Marella wrote 3,312 Medicare Part D claims in 2024
In 2024, Dr. Marella wrote 3,312 Medicare Part D claims for 297 patients. 87% of them were for generic drugs. CMS names the drug for 2,617 of them, across 78 drugs with 11 or more claims each, at $182,362 in total drug cost. In 2023, CMS named 2,091 claims across 71 drugs.
Dr. Marella's Part D claims by kind of drug, 2024
- Generic2,871 claims87%
- Brand-name429 claims13%
- Other12 claims0%
Dr. Marella's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Marella's Part D claims, 2024
- Opioids1%24 of 3,312 claims
- Antibiotics6%192 of 3,312 claims
- Antipsychotics, patients 65 and over1%17 of 3,312 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,0912024: 2,61725%
Drugs named by CMS: 78 in 2024, 71 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregg Gerard Marella scored 20 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 20 out of 100 for Dr. Marella for performance year 2024, reported individually. CMS lists Dr. Marella as offering telehealth.
- Offers telehealth
- Yes
Dr. Marella's MIPS scores, performance year 2024
- 20of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 66of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Gregg Gerard Marella received $4,638 in industry payments from 2016 to 2025
CMS Open Payments shows 304 general payments to Dr. Marella from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $839.
General payments to Dr. Marella by program year, 2016 to 2025
General payments to Dr. Marella by kind, 2016 to 2025
- Food and beverage$4,60199%
- Education$371%
Companies that paid Dr. Marella the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregg Gerard Marella graduated from Pennsylvania State University College of Medicine
Dr. Marella graduated from Pennsylvania State University College of Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregg Gerard Marella's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregg Gerard Marella
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregg Gerard Marella's NPI number?
Dr. Gregg Gerard Marella's NPI number is 1922116326. It was assigned on August 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregg Gerard Marella?
Dr. Gregg Gerard Marella is an internist in Mendham, New Jersey. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregg Gerard Marella practice?
Dr. Marella practices at 19 E Main St, Mendham, NJ 07945. Dr. Marella's primary practice is Mendham Medical Practice in Mendham, New Jersey. Dmand AI also links Dr. Marella to 1 hospital, 1 physician office, 1 home health agency and 1 hospice.
What is Dr. Gregg Gerard Marella's office phone number?
The practice phone on file for Dr. Marella is (973) 543-6505.
What is Dr. Gregg Gerard Marella's medical license number?
Dr. Marella holds New Jersey license MA64502.
Which hospitals is Dr. Gregg Gerard Marella affiliated with?
Dr. Marella is affiliated with Morristown Medical Center. Dmand AI links Dr. Marella to 1 more hospital.
Does Dr. Gregg Gerard Marella accept Medicare?
Yes. CMS data shows Dr. Marella billed Medicare for 2,039 services in 2024.
Does Dr. Gregg Gerard Marella offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marella as offering telehealth services.
What is Dr. Gregg Gerard Marella's MIPS score?
Dr. Marella's MIPS final score for performance year 2024 is 20 out of 100, reported individually.
How many Medicare patients does Dr. Gregg Gerard Marella see?
CMS counts 293 Medicare patients who saw Dr. Marella in 2024, with an average age of 78.
Show 5 more questionsShow fewer questions
What services does Dr. Gregg Gerard Marella bill to Medicare?
In 2024, Dr. Marella's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and surgery: heart and blood vessels (36415).
Where did Dr. Gregg Gerard Marella go to medical school?
Dr. Marella graduated from Pennsylvania State University College of Medicine in 1993.
What drugs does Dr. Gregg Gerard Marella prescribe most?
In 2024 Medicare Part D data, Dr. Marella's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Gregg Gerard Marella received payments from drug or device companies?
CMS Open Payments shows $4,638 in general payments to Dr. Marella from 30 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Gregg Gerard Marella been practicing?
Dr. Marella graduated from medical school in 1993, 33 years ago.
Selling to internal medicine practices?
See internists in New Jersey by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card