Dr. Jan Slezak, MD
- Medicare services, 2024
- 1,903
- Medicare patients, 2024
- 427
- Part D claims, 2024
- 330
- MIPS score, 2024
- 75
- Hospital affiliations
- 5
- Practice address
- 944 Calef Hwy, Barrington, NH 03825
- Practice phone
- Call (603) 664-0100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Barrington Surgical Care
Surgery Center - Medicare-Certified · Barrington, New Hampshire
Find Dr. Slezak'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. Jan Slezak is an interventional pain medicine physician in Barrington, New Hampshire
Dr. Slezak practices at Barrington Surgical Care in Barrington, New Hampshire.
Dr. Slezak's NPI, 1750357307, was assigned on February 24, 2006. Dr. Slezak holds New Hampshire license 10063.
- NPI
- 1750357307NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1557359130
- NPI enumeration date
- February 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (603) 664-0100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jan Slezak practices at Barrington Surgical Care in Barrington, New Hampshire
Dr. Slezak's primary practice is Barrington Surgical Care, at 944 Calef Hwy, Barrington, NH 03825. The practice phone is (603) 664-0100.
- Barrington Surgical Care944 Calef Hwy, Barrington, NH 03825Phone(603) 664-0100
Source: Dmand AI Affiliation Data
Dr. Jan Slezak is affiliated with 6 sites of care and 1 medical group
Dr. Slezak's primary practice is Barrington Surgical Care in Barrington, New Hampshire. Dr. Slezak is also affiliated with Wentworth-Douglass Hospital. The medical group on file is Interventional Spine Medicine. Dmand AI also links Dr. Slezak to 4 more hospitals, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jan Slezak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Slezak practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barrington Surgical Care | Available with a free account |
| +5 more affiliated sites | 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. Jan Slezak is one of 8 interventional pain medicine physicians in New Hampshire
Interventional pain medicine is Dr. Slezak's primary specialty in the NPI Registry, under taxonomy code 208VP0014X. Dr. Slezak is licensed in New Hampshire.
Specialties and state licenses
- Interventional pain medicine, New HampshirePrimary
Interventional pain medicine physicians near Dr. Slezak
Counts of interventional pain medicine physicians 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. Jan Slezak billed Medicare for 1,903 services in 2024
CMS data shows 1,903 Medicare services from Dr. Slezak across 20 procedure codes in 2024, for 427 Medicare patients. Medicare paid $94,592 for them.
Dr. Slezak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 7052024: 61513%
- Drugs given in the office
- 2023: 02024: 560
- Lab and pathology
- 2023: 2802024: 2924%
- Office and hospital visits
- 2023: 6042024: 29052%
- Imaging
- 2023: 1182024: 1098%
- Tests and treatments
- 2023: 1252024: 3770%
- Other services
- 2023: 332024: 0100%
Where Dr. Slezak's Medicare services took place, 2024
- In an office1,36172%
- In a facility54228%
Dr. Slezak'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. Slezak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Slezak and other interventional pain medicine physicians in New Hampshire.
Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Jan Slezak treated 427 Medicare patients in 2024, average age 73
CMS counts 427 Medicare patients who saw Dr. Slezak in 2024. The largest group is 65 to 74, with 173 patients. 75% of them have arthritis, and 71% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Slezak's median patient age at 71, with 54% women.
Dr. Slezak's Medicare patients by age, 2024
Dr. Slezak's Medicare patients by sex, 2024
- Women24958%
- Men17842%
Chronic conditions among Dr. Slezak's Medicare patients, 2024
- Arthritis75%
- High blood pressure71%
- High cholesterol69%
- Anxiety42%
- Mood disorders29%
- Depression27%
- Diabetes26%
- Ischemic heart disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Slezak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
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. Jan Slezak wrote 330 Medicare Part D claims in 2024
In 2024, Dr. Slezak wrote 330 Medicare Part D claims for 123 patients. 99% of them were for generic drugs. CMS names the drug for 277 of them, across 8 drugs with 11 or more claims each, at $4,443 in total drug cost. In 2023, CMS named 653 claims across 15 drugs.
Dr. Slezak's Part D claims by kind of drug, 2024
- Generic327 claims99%
- Brand-name and other3 claims1%
Dr. Slezak'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. Slezak's Part D claims, 2024
- Opioids10%33 of 330 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: 6532024: 27758%
Drugs named by CMS: 8 in 2024, 15 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. Jan Slezak scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Slezak for performance year 2024, reported individually. Dr. Slezak accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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. Jan Slezak received $6,131 in industry payments from 2016 to 2025
CMS Open Payments shows 116 general payments to Dr. Slezak from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pacira Pharmaceuticals Incorporated paid the most, $571.
General payments to Dr. Slezak by program year, 2016 to 2025
Companies that paid Dr. Slezak 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. Jan Slezak'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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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. Jan Slezak
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. Jan Slezak's NPI number?
Dr. Jan Slezak's NPI number is 1750357307. It was assigned on February 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jan Slezak?
Dr. Jan Slezak is an interventional pain medicine physician in Barrington, New Hampshire. The primary specialty in the NPI Registry is Interventional Pain Medicine Physician (taxonomy code 208VP0014X).
Where does Dr. Jan Slezak practice?
Dr. Slezak practices at 944 Calef Hwy, Barrington, NH 03825. Dr. Slezak's primary practice is Barrington Surgical Care in Barrington, New Hampshire. Dmand AI also links Dr. Slezak to 4 hospitals.
What is Dr. Jan Slezak's office phone number?
The practice phone on file for Dr. Slezak is (603) 664-0100.
What is Dr. Jan Slezak's medical license number?
Dr. Slezak holds New Hampshire license 10063.
Which hospitals is Dr. Jan Slezak affiliated with?
Dr. Slezak is affiliated with Wentworth-Douglass Hospital. Dmand AI links Dr. Slezak to 4 more hospitals.
What medical group is Dr. Jan Slezak part of?
Dr. Slezak is linked to Interventional Spine Medicine.
Does Dr. Jan Slezak accept Medicare?
Yes. CMS data shows Dr. Slezak billed Medicare for 1,903 services in 2024, and Dr. Slezak accepts Medicare assignment.
What is Dr. Jan Slezak's MIPS score?
Dr. Slezak's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
How many Medicare patients does Dr. Jan Slezak see?
CMS counts 427 Medicare patients who saw Dr. Slezak in 2024, with an average age of 73.
Show 4 more questionsShow fewer questions
What services does Dr. Jan Slezak bill to Medicare?
In 2024, Dr. Slezak's most billed Medicare services were injected or infused drug (J1010), lab and pathology test (80307) and surgery: brain, spine and nerves (62323).
What drugs does Dr. Jan Slezak prescribe most?
In 2024 Medicare Part D data, Dr. Slezak's most prescribed drugs by claims were Gabapentin, Celecoxib and Diclofenac Potassium.
Has Dr. Jan Slezak received payments from drug or device companies?
CMS Open Payments shows $6,131 in general payments to Dr. Slezak from 40 companies from 2016 to 2025. The largest total came from Pacira Pharmaceuticals Incorporated.
How long has Dr. Jan Slezak been practicing?
Dr. Slezak graduated from medical school in 1986, 40 years ago.
Selling to interventional pain medicine practices?
See interventional pain medicine physicians in New Hampshire 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