Jan Slezak, MD
NPI 1750357307 · Interventional Pain Medicine Physician · Barrington, NH
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jan Slezak, MD is a Interventional Pain Medicine Physician provider in Barrington, NH (NPI 1750357307).
Provider details
- NPI number
- 1750357307
- Entity type
- Individual
- Primary specialty
- Interventional Pain Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 10063 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,343 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Testing for Presence of Drug, By Chemistry Analyzers80307 | 292 | $61 |
| Injection of Substance Into Lower Spine Canal Using Imaging Guidance62323 | 133 | $97 |
| Ultrasonic Guidance for Needle Placement76942 | 109 | $58 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 98 | $128 |
| Destruction of Lower Or Sacral Spinal Facet Joint Nerves Using Imaging Guidance, Single Facet Joint64635 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 87 | 35 |
| Celecoxib | 61 | 20 |
| Diclofenac Potassium | 42 | 14 |
| Cyclobenzaprine Hcl | 20 | — |
| Diazepam | 19 | 19 |
| Methylprednisolone | 16 | 15 |
| Pregabalin | 16 | — |
| Tramadol Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$844 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-24
- Last updated
- 2018-01-10
Frequently asked questions
- What is Jan Slezak's NPI number?
- Jan Slezak's National Provider Identifier (NPI) is 1750357307, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jan Slezak's specialty?
- Jan Slezak is listed in the NPPES registry with a primary specialty of Interventional Pain Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jan Slezak located?
- Jan Slezak's practice location on file with NPPES is 944 Calef Hwy, Barrington, NH 03825-7244.
- What is Jan Slezak's phone number?
- The practice phone number listed in the NPPES registry for Jan Slezak is (603) 664-0100.
- Does Jan Slezak accept Medicare?
- Jan Slezak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jan Slezak's NPI active?
- Yes — Jan Slezak's NPI (1750357307) is active in the NPPES registry as of the last update on 2018-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.