Jan Slezak, MD
Interventional Pain Medicine Physician · Barrington, NH
Jan Slezak, MD is an interventional pain medicine physician with a practice address in Barrington, New Hampshire, and NPI 1750357307, issued on Feb 24, 2006. Check the license (New Hampshire 10063, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Jan Slezak
- Credential
- MD
- Primary taxonomy
- Interventional Pain Medicine Physician 208VP0014X
- License number
- 10063 NH
Self-reported in NPPES; status is on the state search - Practice location
- 944 Calef Hwy, Barrington, NH 03825
- Phone
- (603) 664-0100
- Enumerated
- Feb 24, 2006
- Record last updated
- Jan 10, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (603) 664-0101
- Medicaid ID
- 30010746 NH
- Medicare enrollment
- Enrolled (PECOS I20040805001317); accepts Medicare assignment
- Entity
- Type 1 · individual
7 nearest interventional pain medicine physician records → All 8 in New Hampshire → Look up another NPI →
Also registered at 944 Calef Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Bruchas, FNP-CAdult Health Nurse Practitioner1801345673
- Allen Carignan, M.D.Interventional Pain Medicine Physician1336187855
- Michael Carrier, DPT, CSCSPhysical Therapist1053627794
- Kathleen Daly, NPAdult Health Nurse Practitioner1710446117
- Lindsay Fortin, P.TPhysical Therapist1306021001
- Asteghik Hacobian, MDInterventional Pain Medicine Physician1033184346
Verify Jan Slezak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 10063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average interventional pain medicine physician in 2024
330 Medicare Part D claims for 123 beneficiaries, against an average of 2,306 among the 2,100 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Gabapentin87 claims
- Celecoxib61 claims
- Diclofenac Potassium42 claims
- Cyclobenzaprine Hcl20 claims
- Diazepam19 claims
- Methylprednisolone16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $843.53
8 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 1,966 providers of this specialty with any payment received $3,889.53 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northeast Medical Consultants PCBarrington, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
3 interventional pain medicine physician records list a practice address in Barrington
They are 3 of the 85 NPPES records with a practice address in Barrington, and 8 interventional pain medicine physician records in New Hampshire.
All 8 in New Hampshire → Every provider in Barrington → Interventional Pain Medicine Physician nationwide →
The 7 interventional pain medicine physician records with the nearest ZIP codes
- Allen Carignan, M.D.Barrington, NH 038251336187855
- Asteghik Hacobian, MDBarrington, NH 038251033184346
- Anh Ngo, M.D.Newington, NH 038011609076066
- Manuel Sanchez, MDNewington, NH 038011093781395
- Susanna Pinson, APRNRye, NH 038701235817974
- Janice Gellis, M.D.Lebanon, NH 037561093724197
- Kathleen Killilea, MDManchester, NH 031041982915955
Common questions
What is Jan Slezak, MD's NPI number?
Jan Slezak, MD's National Provider Identifier (NPI) is 1750357307, issued on Feb 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jan Slezak, MD located?
The NPPES record lists a practice address at 944 Calef Hwy, Barrington, NH, 03825. Phone: (603) 664-0100. Providers update this record themselves, so call before visiting.
How can I verify Jan Slezak, MD's license?
NPPES lists New Hampshire license number 10063, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jan Slezak, MD prescribe under Medicare Part D?
In 2024, Jan Slezak, MD had 330 Medicare Part D claims for 123 beneficiaries; the average among interventional pain medicine physician prescribers was 2,306. Part D covers Medicare prescriptions only.
What is Jan Slezak, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.