Dr. Alliam Regan, MD
- Medicare services, 2024
- 155
- Medicare patients, 2024
- 122
- Part D claims, 2024
- 1,180
- Hospital affiliations
- 3
- Medical groups
- 3
- Practice address
- 280 Chestnut St, Springfield, MA 01104
- Practice phone
- Call (413) 794-5700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Baystate Medical Practices, Inc
Springfield, Massachusetts
Find Dr. Regan's professional email, personal email and mobile number
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Dr. Alliam Regan is an internist in Springfield, Massachusetts
Dr. Regan practices at Baystate Medical Practices, Inc in Springfield, Massachusetts.
Dr. Regan's NPI, 1407274574, was assigned on April 4, 2014. Dr. Regan graduated from University of Massachusetts Medical School in 2014. Dr. Regan holds Massachusetts license 273227.
- NPI
- 1407274574NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062632144
- NPI enumeration date
- April 4, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 794-5700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alliam Regan practices at Baystate Medical Practices, Inc in Springfield, Massachusetts
Dr. Regan's primary practice is Baystate Medical Practices, Inc, at 280 Chestnut St, Springfield, MA 01104 in Hampden County. The practice phone is (413) 794-5700.
- Baystate Medical Practices, Inc280 Chestnut St, Springfield, MA 01104 · Hampden CountyPhone(413) 794-5700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Alliam Regan is affiliated with 8 sites of care and 3 medical groups
Dr. Regan's primary practice is Baystate Medical Practices, Inc in Springfield, Massachusetts. Dr. Regan is also affiliated with Baystate Medical Center. The medical group on file is Baystate Medical Practices. Dmand AI also links Dr. Regan to 2 more hospitals, 3 group practices and clinics, 2 medical groups and 1 home health agency, 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. Alliam Regan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Regan practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Baystate Medical Practices, Inc | Available with a free account |
| +7 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alliam Regan is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Regan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Regan is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Regan
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. Alliam Regan billed Medicare for 155 services in 2024
CMS data shows 155 Medicare services from Dr. Regan across 4 procedure codes in 2024, for 122 Medicare patients. Medicare paid $13,008 for them. Every service was in an office.
Dr. Regan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 122024: 129975%
- Other services
- 2023: 02024: 26
Dr. Regan compared with the Massachusetts median for internists, 2024
- Dr. Regan
- Massachusetts median
- Medicare services
- 155vs 43164% below
- Medicare patients
- 122vs 19437% below
- Part D claims
- 743vs 40285% above
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Regan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alliam Regan treated 122 Medicare patients in 2024, average age 72
CMS counts 122 Medicare patients who saw Dr. Regan in 2024. The largest group is 65 to 74, with 53 patients. 74% of them have high blood pressure, and 70% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.47, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Regan's median patient age at 60, with 67% women.
Dr. Regan's Medicare patients by age, 2024
Dr. Regan's Medicare patients by sex, 2024
- Women8771%
- Men3529%
Chronic conditions among Dr. Regan's Medicare patients, 2024
- High blood pressure74%
- High cholesterol70%
- Arthritis57%
- Anxiety42%
- Mood disorders33%
- Diabetes30%
- Ischemic heart disease28%
- Asthma25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Regan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women67%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alliam Regan wrote 1,180 Medicare Part D claims in 2024
In 2024, Dr. Regan wrote 1,180 Medicare Part D claims for 258 patients. 92% of them were for generic drugs. CMS names the drug for 743 of them, across 27 drugs with 11 or more claims each, at $12,289 in total drug cost. In 2023, CMS named 2,473 claims across 64 drugs.
Dr. Regan's Part D claims by kind of drug, 2024
- Generic1,085 claims92%
- Brand-name and other95 claims8%
Dr. Regan'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. Regan's Part D claims, 2024
- Opioids2%20 of 1,180 claims
- Antibiotics2%28 of 1,180 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: 2,4732024: 74370%
Drugs named by CMS: 27 in 2024, 64 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. Alliam Regan takes part in Medicare
Dr. Regan 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. Alliam Regan graduated from University of Massachusetts Medical School
Dr. Regan graduated from University of Massachusetts Medical School in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alliam Regan'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) |
| 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. Alliam Regan
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. Alliam Regan's NPI number?
Dr. Alliam Regan's NPI number is 1407274574. It was assigned on April 4, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Alliam Regan?
Dr. Alliam Regan is an internist in Springfield, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Alliam Regan practice?
Dr. Regan practices at 280 Chestnut St, Springfield, MA 01104. Dr. Regan's primary practice is Baystate Medical Practices, Inc in Springfield, Massachusetts. Dmand AI also links Dr. Regan to 2 hospitals, 3 group practices and clinics, 2 medical groups and 1 home health agency.
What is Dr. Alliam Regan's office phone number?
The practice phone on file for Dr. Regan is (413) 794-5700.
What is Dr. Alliam Regan's medical license number?
Dr. Regan holds Massachusetts license 273227.
Which hospitals is Dr. Alliam Regan affiliated with?
Dr. Regan is affiliated with Baystate Medical Center. Dmand AI links Dr. Regan to 2 more hospitals.
What medical group is Dr. Alliam Regan part of?
Dr. Regan is linked to Baystate Medical Practices. Dmand AI links Dr. Regan to 2 more medical groups.
Does Dr. Alliam Regan accept Medicare?
Yes. CMS data shows Dr. Regan billed Medicare for 155 services in 2024, and Dr. Regan accepts Medicare assignment.
How many Medicare patients does Dr. Alliam Regan see?
CMS counts 122 Medicare patients who saw Dr. Regan in 2024, with an average age of 72.
What services does Dr. Alliam Regan bill to Medicare?
In 2024, Dr. Regan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G2211).
Show 3 more questionsShow fewer questions
Where did Dr. Alliam Regan go to medical school?
Dr. Regan graduated from University of Massachusetts Medical School in 2014.
What drugs does Dr. Alliam Regan prescribe most?
In 2024 Medicare Part D data, Dr. Regan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Omeprazole.
How long has Dr. Alliam Regan been practicing?
Dr. Regan graduated from medical school in 2014, 12 years ago.
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