Dr. Frederik A. Pennings, MD, PhD
- Medicare services, 2024
- 395
- Medicare patients, 2024
- 176
- Part D claims, 2021
- 12
- Hospital affiliations
- 2
- Industry payments
- $587,671
- Practice address
- 575 Beech Street, Holyoke, MA 01040
- Practice phone
- Call (413) 534-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Pennings' professional email, personal email and mobile number
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Dr. Frederik A. Pennings is a neurosurgeon in Holyoke, Massachusetts
Dr. Pennings practices at Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems.
Dr. Pennings' NPI, 1215126479, was assigned on October 23, 2007. Dr. Pennings holds Massachusetts license 234128.
- NPI
- 1215126479NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789769043
- NPI enumeration date
- October 23, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 534-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Frederik A. Pennings practices at Holyoke Medical Center in Holyoke, Massachusetts
Dr. Pennings' primary practice is Holyoke Medical Center, at 575 Beech Street, Holyoke, MA 01040 in Hampden County. The practice phone is (413) 534-2500.
- Holyoke Medical Center575 Beech Street, Holyoke, MA 01040 · Hampden CountyPhone(413) 534-2500
Source: Dmand AI Affiliation Data
Dr. Frederik A. Pennings is affiliated with 2 sites of care and 4 medical groups
Dr. Pennings' primary practice is Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems. Dr. Pennings is also affiliated with Cooley Dickinson Hospital. The medical group on file is Holyoke Medical Center. Dmand AI also links Dr. Pennings to 3 more medical groups, each named with a free account. Dr. Pennings' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Frederik A. Pennings' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Pennings practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Holyoke Medical Center | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Frederik A. Pennings is one of 182 neurosurgeons in Massachusetts
Neurological surgery is Dr. Pennings' primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Pennings is licensed in Massachusetts.
Specialties and state licenses
- Neurological surgery, MassachusettsPrimary
Neurosurgeons near Dr. Pennings
Counts of neurosurgeons 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. Frederik A. Pennings billed Medicare for 395 services in 2024
CMS data shows 395 Medicare services from Dr. Pennings across 13 procedure codes in 2024, for 176 Medicare patients. Medicare paid $169,348 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Pennings' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1092024: 257136%
- Office and hospital visits
- 2023: 1102024: 13825%
Dr. Pennings compared with the Massachusetts median for neurosurgeons, 2024
- Dr. Pennings
- Massachusetts median
- Medicare services
- 395vs 20296% above
- Medicare patients
- 176vs 1619% above
- Part D claims
- 12vs 2245% below
Medians across 156 neurosurgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Pennings' 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. Frederik A. Pennings treated 176 Medicare patients in 2024, average age 73
CMS counts 176 Medicare patients who saw Dr. Pennings in 2024. The largest group is 65 to 74, with 76 patients. 75% of them have arthritis, and 75% have high blood pressure. 22% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Pennings' median patient age at 66, with 54% women.
Dr. Pennings' Medicare patients by age, 2024
Dr. Pennings' Medicare patients by sex, 2024
- Women8347%
- Men9353%
Chronic conditions among Dr. Pennings' Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders34%
- Anxiety32%
- Depression31%
- Diabetes31%
- COPD30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Pennings' 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
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Frederik A. Pennings wrote 12 Medicare Part D claims in 2021
In 2021, Dr. Pennings wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $142 in total drug cost.
Dr. Pennings' most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Frederik A. Pennings ranks in the 96th percentile for laminectomy or laminotomy (partial removal of spine bones) in Medicare
Dr. Pennings accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 125 procedures of laminectomy or laminotomy (partial removal of spine bones) by Dr. Pennings, more than 96% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Pennings ranks in Medicare procedure volume
- Spinal fusion
- 91st percentile217 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 96th percentile125 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Frederik A. Pennings received $587,671 in industry payments from 2016 to 2025
CMS Open Payments shows 230 general payments to Dr. Pennings from 20 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 97% of the total. CTL Medical Corporation paid the most, $551,663.
General payments to Dr. Pennings by program year, 2016 to 2025
General payments to Dr. Pennings by kind, 2016 to 2025
- Consulting fees$571,00597%
- Travel and lodging$11,3252%
- Food and beverage$5,1481%
- Gifts$1930%
Companies that paid Dr. Pennings the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Frederik A. Pennings'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Frederik A. Pennings
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. Frederik A. Pennings' NPI number?
Dr. Frederik A. Pennings' NPI number is 1215126479. It was assigned on October 23, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Frederik A. Pennings?
Dr. Frederik A. Pennings is a neurosurgeon in Holyoke, Massachusetts. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Frederik A. Pennings practice?
Dr. Pennings practices at 575 Beech Street, Holyoke, MA 01040. Dr. Pennings' primary practice is Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems. Dmand AI also links Dr. Pennings to 3 medical groups.
What is Dr. Frederik A. Pennings' office phone number?
The practice phone on file for Dr. Pennings is (413) 534-2500.
What is Dr. Frederik A. Pennings' medical license number?
Dr. Pennings holds Massachusetts license 234128.
Which hospitals is Dr. Frederik A. Pennings affiliated with?
Dr. Pennings practices at Holyoke Medical Center in Holyoke, Massachusetts. Dr. Pennings is also affiliated with Cooley Dickinson Hospital.
What medical group is Dr. Frederik A. Pennings part of?
Dr. Pennings is linked to Holyoke Medical Center. Dmand AI links Dr. Pennings to 3 more medical groups.
Does Dr. Frederik A. Pennings accept Medicare?
Yes. CMS data shows Dr. Pennings billed Medicare for 395 services in 2024, and Dr. Pennings accepts Medicare assignment.
How many Medicare patients does Dr. Frederik A. Pennings see?
CMS counts 176 Medicare patients who saw Dr. Pennings in 2024, with an average age of 73.
What services does Dr. Frederik A. Pennings bill to Medicare?
In 2024, Dr. Pennings' most billed Medicare services were surgery: bones and joints (22853), office visit, new patient (99204) and office visit, established patient (99213).
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What drugs does Dr. Frederik A. Pennings prescribe most?
In 2021 Medicare Part D data, Dr. Pennings' most prescribed drugs by claims were Oxycodone HCl.
Has Dr. Frederik A. Pennings received payments from drug or device companies?
CMS Open Payments shows $587,671 in general payments to Dr. Pennings from 20 companies from 2016 to 2025. The largest total came from CTL Medical Corporation.
How long has Dr. Frederik A. Pennings been practicing?
Dr. Pennings graduated from medical school in 1995, 31 years ago.
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