Stephen Nilsen, D.O.
NPI 1972589398 · Anesthesiology Physician · Nottingham, MD
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Nilsen, D.O. is a Anesthesiology Physician provider in Nottingham, MD (NPI 1972589398).
Provider details
- NPI number
- 1972589398
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- DO33153 (DC)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
60 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) |
|---|---|---|
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 36 | $125 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 13 | $127 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 11 | $161 |
Typical Medicare-allowed amounts for these services range $125–$161 (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 (1)
- 28665 Earthlite RdWye Mills, MD 21679-2024Phone: (410) 827-7188Fax: (410) 827-7076
Registry dates
- Enumerated
- 2005-12-17
- Last updated
- 2024-06-24
- Certified
- 2024-06-24
Frequently asked questions
- What is Stephen Nilsen's NPI number?
- Stephen Nilsen's National Provider Identifier (NPI) is 1972589398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Nilsen's specialty?
- Stephen Nilsen is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Nilsen located?
- Stephen Nilsen's practice location on file with NPPES is 8100 Sandpiper Cir Ste 210, Nottingham, MD 21236-4992.
- What is Stephen Nilsen's phone number?
- The practice phone number listed in the NPPES registry for Stephen Nilsen is (855) 527-7246.
- Does Stephen Nilsen accept Medicare?
- Stephen Nilsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Nilsen's NPI active?
- Yes — Stephen Nilsen's NPI (1972589398) is active in the NPPES registry as of the last update on 2024-06-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.