Dr. Janet L. Mahan, MD
- Medicare services, 2024
- 2,748
- Medicare patients, 2024
- 411
- Part D claims, 2024
- 5,799
- Industry payments
- $183
- Affiliated sites
- 5
- Practice address
- 1945 State Highway 33, Neptune, NJ 07753
- Practice phone
- Call (732) 776-2325
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Jersey Shore University Medical Center
Neptune, New Jersey
Find Dr. Mahan'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. Janet L. Mahan is an internist in Neptune, New Jersey
Dr. Mahan practices at Jersey Shore University Medical Center in Neptune, New Jersey.
Dr. Mahan's NPI, 1780651448, was assigned on March 1, 2006. Dr. Mahan graduated from Howard University College of Medicine in 1985. Dr. Mahan holds New Jersey license 25MAO4910600.
- NPI
- 1780651448NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234187592
- NPI enumeration date
- March 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (732) 776-2325
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Janet L. Mahan practices at Jersey Shore University Medical Center in Neptune, New Jersey
Dr. Mahan's primary practice is Jersey Shore University Medical Center, at 1945 State Highway 33, Neptune, NJ 07753 in Monmouth County. The practice phone is (732) 776-2325.
- Jersey Shore University Medical Center1945 State Highway 33, Neptune, NJ 07753 · Monmouth CountyPhone(732) 776-2325
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Janet L. Mahan is affiliated with 6 sites of care and 2 medical groups
Dr. Mahan's primary practice is Jersey Shore University Medical Center in Neptune, New Jersey. The medical group on file is GPS Physician Group of New Jersey. Dmand AI also links Dr. Mahan to 1 more physician office, 1 group practice or clinic, 1 home health agency, 1 hospice, 1 skilled nursing facility and 1 medical group, 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. Janet L. Mahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mahan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Jersey Shore University Medical Center | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Janet L. Mahan is one of 4,226 internists in New Jersey
Internal medicine is Dr. Mahan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mahan is licensed in New Jersey.
Specialties and state licenses
- Internal medicine, New JerseyPrimary
Internists near Dr. Mahan
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. Janet L. Mahan billed Medicare for 2,748 services in 2024
CMS data shows 2,748 Medicare services from Dr. Mahan across 30 procedure codes in 2024, for 411 Medicare patients. Medicare paid $130,046 for them.
Dr. Mahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1252024: 1,2047%
- Other services
- 2023: 2502024: 964286%
- Surgery
- 2023: 2842024: 34823%
- Tests and treatments
- 2023: 262024: 152485%
- Lab and pathology
- 2023: 822024: 802%
Where Dr. Mahan's Medicare services took place, 2024
- In an office2,48290%
- In a facility26610%
Dr. Mahan compared with the New Jersey median for internists, 2024
- Dr. Mahan
- New Jersey median
- Medicare services
- 2,748vs 7233.8 times
- Medicare patients
- 411vs 23178% above
- Part D claims
- 5,080vs 8306.1 times
Medians across 4,086 internists in New Jersey with Dmand AI profiles that report each measure.
Dr. Mahan'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. Mahan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mahan and other internists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Janet L. Mahan treated 411 Medicare patients in 2024, average age 88
CMS counts 411 Medicare patients who saw Dr. Mahan in 2024. The largest group is 85 and over, with 279 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Mahan's median patient age at 88, with 66% women.
Dr. Mahan's Medicare patients by age, 2024
Dr. Mahan's Medicare patients by sex, 2024
- Women30273%
- Men10927%
Chronic conditions among Dr. Mahan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Chronic kidney disease56%
- Anxiety45%
- Mood disorders45%
- Ischemic heart disease43%
- Atrial fibrillation40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 88
Patient panel by sex, all payers
- Women66%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Janet L. Mahan wrote 5,799 Medicare Part D claims in 2024
In 2024, Dr. Mahan wrote 5,799 Medicare Part D claims for 394 patients. 85% of them were for generic drugs. CMS names the drug for 5,080 of them, across 110 drugs with 11 or more claims each, at $353,154 in total drug cost. In 2023, CMS named 5,302 claims across 117 drugs.
Dr. Mahan's Part D claims by kind of drug, 2024
- Generic4,912 claims85%
- Brand-name859 claims15%
- Other28 claims0%
Dr. Mahan'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. Mahan's Part D claims, 2024
- Opioids2%133 of 5,799 claims
- Antibiotics3%198 of 5,799 claims
- Antipsychotics, patients 65 and over1%44 of 5,799 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: 5,3022024: 5,0804%
Drugs named by CMS: 110 in 2024, 117 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
How Dr. Janet L. Mahan takes part in Medicare
Dr. Mahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Janet L. Mahan received $183 in industry payments from 2016 to 2018
CMS Open Payments shows 6 general payments to Dr. Mahan from 4 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Mallinckrodt LLC paid the most, $110.
General payments to Dr. Mahan by program year, 2016 to 2018
Companies that paid Dr. Mahan the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Janet L. Mahan graduated from Howard University College of Medicine
Dr. Mahan graduated from Howard University College of Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Janet L. Mahan'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) |
| 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. Janet L. Mahan
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. Janet L. Mahan's NPI number?
Dr. Janet L. Mahan's NPI number is 1780651448. It was assigned on March 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Janet L. Mahan?
Dr. Janet L. Mahan is an internist in Neptune, New Jersey. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Janet L. Mahan practice?
Dr. Mahan practices at 1945 State Highway 33, Neptune, NJ 07753. Dr. Mahan's primary practice is Jersey Shore University Medical Center in Neptune, New Jersey. Dmand AI also links Dr. Mahan to 1 physician office, 1 group practice or clinic, 1 home health agency, 1 hospice, 1 skilled nursing facility and 1 medical group.
What is Dr. Janet L. Mahan's office phone number?
The practice phone on file for Dr. Mahan is (732) 776-2325.
What is Dr. Janet L. Mahan's medical license number?
Dr. Mahan holds New Jersey license 25MAO4910600.
What medical group is Dr. Janet L. Mahan part of?
Dr. Mahan is linked to GPS Physician Group of New Jersey. Dmand AI links Dr. Mahan to 1 more medical group.
Does Dr. Janet L. Mahan accept Medicare?
Yes. CMS data shows Dr. Mahan billed Medicare for 2,748 services in 2024, and Dr. Mahan accepts Medicare assignment.
How many Medicare patients does Dr. Janet L. Mahan see?
CMS counts 411 Medicare patients who saw Dr. Mahan in 2024, with an average age of 88.
What services does Dr. Janet L. Mahan bill to Medicare?
In 2024, Dr. Mahan's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and surgery: heart and blood vessels (36415).
Where did Dr. Janet L. Mahan go to medical school?
Dr. Mahan graduated from Howard University College of Medicine in 1985.
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What drugs does Dr. Janet L. Mahan prescribe most?
In 2024 Medicare Part D data, Dr. Mahan's most prescribed drugs by claims were Atorvastatin Calcium, Furosemide and Amlodipine Besylate.
Has Dr. Janet L. Mahan received payments from drug or device companies?
CMS Open Payments shows $183 in general payments to Dr. Mahan from 4 companies from 2016 to 2018. The largest total came from Mallinckrodt LLC.
How long has Dr. Janet L. Mahan been practicing?
Dr. Mahan graduated from medical school in 1985, 41 years ago.
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