William Santos, M.D.
NPI 1811981509 · Anesthesiology Physician · Iowa City, IA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Santos, M.D. is a Anesthesiology Physician provider in Iowa City, IA (NPI 1811981509).
Provider details
- NPI number
- 1811981509
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- L6618 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
265 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 Lens Surgery00142 | 254 | $122 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 11 | $112 |
Typical Medicare-allowed amounts for these services range $112–$122 (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
Registry dates
- Enumerated
- 2005-09-08
- Last updated
- 2013-10-16
Frequently asked questions
- What is William Santos's NPI number?
- William Santos's National Provider Identifier (NPI) is 1811981509, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Santos's specialty?
- William Santos is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Santos located?
- William Santos's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242-1009.
- What is William Santos's phone number?
- The practice phone number listed in the NPPES registry for William Santos is (319) 356-2633.
- Does William Santos accept Medicare?
- William Santos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Santos's NPI active?
- Yes — William Santos's NPI (1811981509) is active in the NPPES registry as of the last update on 2013-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.