Dr. Darrell Loren Southern, MD
- Medicare services, 2024
- 135
- Medicare patients, 2024
- 65
- Part D claims, 2024
- 505
- Industry payments
- $11,120
- Affiliated sites
- 1
- Practice address
- 24 Vreeland Dr, Skillman, NJ 08558
- Practice phone
- Call (609) 921-2202
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Princeton Allergy & Asthma Associates, PA
Skillman, New Jersey
Find Dr. Southern'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. Darrell Loren Southern is an allergist and immunologist in Skillman, New Jersey
Dr. Southern practices at Princeton Allergy & Asthma Associates, PA in Skillman, New Jersey.
Dr. Southern's NPI, 1548268907, was assigned on July 11, 2005. Dr. Southern graduated from Columbia University College of Physicians and Surgeons in 1971. Dr. Southern holds New Jersey license MA31265.
- NPI
- 1548268907NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133028574
- NPI enumeration date
- July 11, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (609) 921-2202
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Darrell Loren Southern practices at Princeton Allergy & Asthma Associates, PA in Skillman, New Jersey
Dr. Southern's primary practice is Princeton Allergy & Asthma Associates, PA, at 24 Vreeland Dr, Skillman, NJ 08558 in Somerset County. The practice phone is (609) 921-2202.
- Princeton Allergy & Asthma Associates, PA24 Vreeland Dr, Skillman, NJ 08558 · Somerset CountyPhone(609) 921-2202
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Darrell Loren Southern is affiliated with 2 sites of care and 1 medical group
Dr. Southern's primary practice is Princeton Allergy & Asthma Associates, PA in Skillman, New Jersey. The medical group on file is Princeton Allergy & Asthma. Dmand AI also links Dr. Southern to 1 more group practice or clinic, 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. Darrell Loren Southern's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Southern practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Princeton Allergy & Asthma Associates, PA | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Darrell Loren Southern is one of 124 allergists and immunologists in New Jersey
Allergy and immunology is Dr. Southern's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Southern is licensed in New Jersey.
Specialties and state licenses
- Allergy and immunology, New JerseyPrimary
Allergists and immunologists near Dr. Southern
Counts of allergists and immunologists 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. Darrell Loren Southern billed Medicare for 135 services in 2024
CMS data shows 135 Medicare services from Dr. Southern across 3 procedure codes in 2024, for 65 Medicare patients. Medicare paid $5,902 for them. Every service was in an office.
Dr. Southern's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 842024: 796%
- Tests and treatments
- 2023: 1212024: 5654%
Dr. Southern compared with the New Jersey median for allergists and immunologists, 2024
- Dr. Southern
- New Jersey median
- Medicare services
- 135vs 1,54491% below
- Medicare patients
- 65vs 12146% below
- Part D claims
- 362vs 27333% above
Medians across 123 allergists and immunologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Southern'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Southern and other allergists and immunologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Darrell Loren Southern treated 65 Medicare patients in 2024, average age 74
CMS counts 65 Medicare patients who saw Dr. Southern in 2024. The largest group is 65 to 74, with 30 patients. 75% of them have high cholesterol, and 65% have high blood pressure. Their average risk score is 0.72, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Southern's median patient age at 51, with 54% women.
Dr. Southern's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Southern's Medicare patients by sex, 2024
- Women4062%
- Men2538%
Chronic conditions among Dr. Southern's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Asthma60%
- Arthritis55%
- Osteoporosis23%
- Cancer17%
- Diabetes17%
- Ischemic heart disease17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Southern's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women54%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Darrell Loren Southern wrote 505 Medicare Part D claims in 2024
In 2024, Dr. Southern wrote 505 Medicare Part D claims for 71 patients. 62% of them were for generic drugs. CMS names the drug for 362 of them, across 15 drugs with 11 or more claims each, at $93,573 in total drug cost. In 2023, CMS named 320 claims across 14 drugs.
Dr. Southern's Part D claims by kind of drug, 2024
- Generic311 claims62%
- Brand-name194 claims38%
Dr. Southern'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3202024: 36213%
Drugs named by CMS: 15 in 2024, 14 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. Darrell Loren Southern takes part in Medicare
Dr. Southern 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. Darrell Loren Southern received $11,120 in industry payments from 2017 to 2025
CMS Open Payments shows 80 general payments to Dr. Southern from 11 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 48% of the total. Optinose US, Inc. paid the most, $4,495.
General payments to Dr. Southern by program year, 2017 to 2025
General payments to Dr. Southern by kind, 2017 to 2025
- Travel and lodging$5,28648%
- Food and beverage$2,58423%
- Honoraria$2,50022%
- Speaker and faculty fees$7507%
Companies that paid Dr. Southern the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Darrell Loren Southern graduated from Columbia University College of Physicians and Surgeons
Dr. Southern graduated from Columbia University College of Physicians and Surgeons in 1971.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Darrell Loren Southern'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. Darrell Loren Southern
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. Darrell Loren Southern's NPI number?
Dr. Darrell Loren Southern's NPI number is 1548268907. It was assigned on July 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Darrell Loren Southern?
Dr. Darrell Loren Southern is an allergist and immunologist in Skillman, New Jersey. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Darrell Loren Southern practice?
Dr. Southern practices at 24 Vreeland Dr, Skillman, NJ 08558. Dr. Southern's primary practice is Princeton Allergy & Asthma Associates, PA in Skillman, New Jersey. Dmand AI also links Dr. Southern to 1 group practice or clinic.
What is Dr. Darrell Loren Southern's office phone number?
The practice phone on file for Dr. Southern is (609) 921-2202.
What is Dr. Darrell Loren Southern's medical license number?
Dr. Southern holds New Jersey license MA31265.
What medical group is Dr. Darrell Loren Southern part of?
Dr. Southern is linked to Princeton Allergy & Asthma.
Does Dr. Darrell Loren Southern accept Medicare?
Yes. CMS data shows Dr. Southern billed Medicare for 135 services in 2024, and Dr. Southern accepts Medicare assignment.
How many Medicare patients does Dr. Darrell Loren Southern see?
CMS counts 65 Medicare patients who saw Dr. Southern in 2024, with an average age of 74.
What services does Dr. Darrell Loren Southern bill to Medicare?
In 2024, Dr. Southern's most billed Medicare services were office visit, established patient (99213), allergy test or treatment (95117) and lung function service (94010).
Where did Dr. Darrell Loren Southern go to medical school?
Dr. Southern graduated from Columbia University College of Physicians and Surgeons in 1971.
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What drugs does Dr. Darrell Loren Southern prescribe most?
In 2024 Medicare Part D data, Dr. Southern's most prescribed drugs by claims were Montelukast Sodium, Albuterol Sulfate Hfa and Breo Ellipta.
Has Dr. Darrell Loren Southern received payments from drug or device companies?
CMS Open Payments shows $11,120 in general payments to Dr. Southern from 11 companies from 2017 to 2025. The largest total came from Optinose US, Inc.
How long has Dr. Darrell Loren Southern been practicing?
Dr. Southern graduated from medical school in 1971, 55 years ago.
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