Dr. Peter John Drennan, DO
- Medicare services, 2024
- 1,405
- Medicare patients, 2024
- 282
- Part D claims, 2024
- 6,218
- Hospital affiliations
- 3
- Industry payments
- $2,035
- Practice address
- 2150 Main St, Springfield, MA 01104
- Practice phone
- Call (413) 739-5676
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Springfield Medical Associates, Inc
Springfield, Massachusetts
Find Dr. Drennan'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. Peter John Drennan is an internist in Springfield, Massachusetts
Dr. Drennan practices at Springfield Medical Associates, Inc in Springfield, Massachusetts.
Dr. Drennan's NPI, 1629043625, was assigned on February 22, 2006. Dr. Drennan graduated from University of New England, College of Osteo Medicine in 1983. Dr. Drennan holds Massachusetts license 54104.
- NPI
- 1629043625NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890684021
- NPI enumeration date
- February 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (413) 739-5676
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter John Drennan practices at Springfield Medical Associates, Inc in Springfield, Massachusetts
Dr. Drennan's primary practice is Springfield Medical Associates, Inc, at 2150 Main St, Springfield, MA 01104 in Hampden County. The practice phone is (413) 739-5676.
- Springfield Medical Associates, Inc2150 Main St, Springfield, MA 01104 · Hampden CountyPhone(413) 739-5676
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Peter John Drennan is affiliated with 9 sites of care and 2 medical groups
Dr. Drennan's primary practice is Springfield Medical Associates, Inc in Springfield, Massachusetts. Dr. Drennan is also affiliated with Baystate Medical Center. The medical group on file is Baystate Medical Practices. Dmand AI also links Dr. Drennan to 2 more hospitals, 3 home health agencies, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter John Drennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Drennan practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Springfield Medical Associates, Inc | Available with a free account |
| +8 more sites and 1 medical group | 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. Peter John Drennan is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Drennan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Drennan's licenses on file in 2 states: Massachusetts and Connecticut.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- Connecticut license
Internists near Dr. Drennan
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. Peter John Drennan billed Medicare for 1,405 services in 2024
CMS data shows 1,405 Medicare services from Dr. Drennan across 13 procedure codes in 2024, for 282 Medicare patients. Medicare paid $98,963 for them. Every service was in an office.
Dr. Drennan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8042024: 7418%
- Other services
- 2023: 2492024: 45884%
- Tests and treatments
- 2023: 2152024: 2064%
Dr. Drennan compared with the Massachusetts median for internists, 2024
- Dr. Drennan
- Massachusetts median
- Medicare services
- 1,405vs 4313.3 times
- Medicare patients
- 282vs 19445% above
- Part D claims
- 5,562vs 40213.8 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Drennan'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. Drennan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Drennan and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter John Drennan treated 282 Medicare patients in 2024, average age 76
CMS counts 282 Medicare patients who saw Dr. Drennan in 2024. The largest group is 65 to 74, with 119 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Drennan's median patient age at 66, with 46% women.
Dr. Drennan's Medicare patients by age, 2024
Dr. Drennan's Medicare patients by sex, 2024
- Women15655%
- Men12645%
Chronic conditions among Dr. Drennan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes26%
- Anxiety24%
- Ischemic heart disease24%
- Chronic kidney disease23%
- Atrial fibrillation19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Drennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter John Drennan wrote 6,218 Medicare Part D claims in 2024
In 2024, Dr. Drennan wrote 6,218 Medicare Part D claims for 452 patients. 91% of them were for generic drugs. CMS names the drug for 5,562 of them, across 115 drugs with 11 or more claims each, at $313,053 in total drug cost. In 2023, CMS named 5,486 claims across 117 drugs.
Dr. Drennan's Part D claims by kind of drug, 2024
- Generic5,643 claims91%
- Brand-name546 claims9%
- Other29 claims0%
Dr. Drennan'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. Drennan's Part D claims, 2024
- Opioids2%153 of 6,218 claims
- Antibiotics3%179 of 6,218 claims
- Antipsychotics, patients 65 and over0%13 of 6,218 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: 5,4862024: 5,5621%
Drugs named by CMS: 115 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
Dr. Peter John Drennan offers telehealth to Medicare patients
Dr. Drennan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Drennan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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. Peter John Drennan received $2,035 in industry payments from 2016 to 2023
CMS Open Payments shows 124 general payments to Dr. Drennan from 34 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $236.
General payments to Dr. Drennan by program year, 2016 to 2023
General payments to Dr. Drennan by kind, 2016 to 2023
- Food and beverage$2,031100%
- Education$50%
Companies that paid Dr. Drennan the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter John Drennan graduated from University of New England, College of Osteo Medicine
Dr. Drennan graduated from University of New England, College of Osteo Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Peter John Drennan'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 DataDmand AI Org Hierarchy 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. Peter John Drennan
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. Peter John Drennan's NPI number?
Dr. Peter John Drennan's NPI number is 1629043625. It was assigned on February 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter John Drennan?
Dr. Peter John Drennan is an internist in Springfield, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Peter John Drennan practice?
Dr. Drennan practices at 2150 Main St, Springfield, MA 01104. Dr. Drennan's primary practice is Springfield Medical Associates, Inc in Springfield, Massachusetts. Dmand AI also links Dr. Drennan to 2 hospitals, 3 home health agencies, 2 group practices and clinics and 1 medical group.
What is Dr. Peter John Drennan's office phone number?
The practice phone on file for Dr. Drennan is (413) 739-5676.
What is Dr. Peter John Drennan's medical license number?
Dr. Drennan holds Massachusetts license 54104, one of the licenses on file in 2 states.
Which states has Dr. Peter John Drennan been licensed in?
Dmand AI has state licenses on file for Dr. Drennan in Massachusetts and Connecticut.
Which hospitals is Dr. Peter John Drennan affiliated with?
Dr. Drennan is affiliated with Baystate Medical Center. Dmand AI links Dr. Drennan to 2 more hospitals.
What medical group is Dr. Peter John Drennan part of?
Dr. Drennan is linked to Baystate Medical Practices. Dmand AI links Dr. Drennan to 1 more medical group.
Does Dr. Peter John Drennan accept Medicare?
Yes. CMS data shows Dr. Drennan billed Medicare for 1,405 services in 2024, and Dr. Drennan accepts Medicare assignment.
Does Dr. Peter John Drennan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Drennan as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Peter John Drennan see?
CMS counts 282 Medicare patients who saw Dr. Drennan in 2024, with an average age of 76.
What services does Dr. Peter John Drennan bill to Medicare?
In 2024, Dr. Drennan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G2211).
Where did Dr. Peter John Drennan go to medical school?
Dr. Drennan graduated from University of New England, College of Osteo Medicine in 1983.
What drugs does Dr. Peter John Drennan prescribe most?
In 2024 Medicare Part D data, Dr. Drennan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. Peter John Drennan received payments from drug or device companies?
CMS Open Payments shows $2,035 in general payments to Dr. Drennan from 34 companies from 2016 to 2023. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Peter John Drennan been practicing?
Dr. Drennan graduated from medical school in 1983, 43 years ago.
Selling to internal medicine practices?
See internists in Massachusetts 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