Stephen Marko, M.D.
NPI 1265843718 · Critical Care Medicine (Internal Medicine) Physician · Manchester, NH
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Marko, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Manchester, NH (NPI 1265843718).
Provider details
- NPI number
- 1265843718
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 20652 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
46 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 33 | $177 |
| Critical Care, First 30-74 Minutes99291 | 13 | $215 |
Typical Medicare-allowed amounts for these services range $177–$215 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 20 York StNew Haven, CT 06510-3220Phone: (203) 688-4242
- 10 Alice Peck Day DrLebanon, NH 03766-2900Phone: (603) 448-3121
- 1 Medical Center DrLebanon, NH 03756-0001Phone: (603) 650-5000
Registry dates
- Enumerated
- 2014-05-17
- Last updated
- 2024-10-04
- Certified
- 2024-10-04
Frequently asked questions
- What is Stephen Marko's NPI number?
- Stephen Marko's National Provider Identifier (NPI) is 1265843718, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Marko's specialty?
- Stephen Marko is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Marko located?
- Stephen Marko's practice location on file with NPPES is 1 Elliot Way, Manchester, NH 03103-3502.
- What is Stephen Marko's phone number?
- The practice phone number listed in the NPPES registry for Stephen Marko is (603) 663-2710.
- Does Stephen Marko accept Medicare?
- Stephen Marko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Marko's NPI active?
- Yes — Stephen Marko's NPI (1265843718) is active in the NPPES registry as of the last update on 2024-10-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.