William Kwass, D.O., M.B.A.
NPI 1669834446 · Anesthesiology Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Kwass, D.O., M.B.A. is a Anesthesiology Physician provider in Tucson, AZ (NPI 1669834446).
Provider details
- NPI number
- 1669834446
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O., M.B.A.
- Sex
- Male
- Sole proprietor
- No
- License
- S3412 (TX)
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
10 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
82 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) |
|---|---|---|
| Ultrasonic Guidance for Blood Vessel Access76937 | 34 | $13 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 33 | $42 |
| Anesthesia for Procedure on Heart and Large Blood Vessels00560 | 15 | $490 |
Typical Medicare-allowed amounts for these services range $13–$490 (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)
- 12222 Merit Dr Ste 600Dallas, TX 75251-3294Phone: (972) 715-5000Fax: (972) 715-9976
Registry dates
- Enumerated
- 2016-03-22
- Last updated
- 2026-04-02
- Certified
- 2026-04-02
Frequently asked questions
- What is William Kwass's NPI number?
- William Kwass's National Provider Identifier (NPI) is 1669834446, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Kwass's specialty?
- William Kwass is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Kwass located?
- William Kwass's practice location on file with NPPES is 4753 E Camp Lowell Dr, Tucson, AZ 85712-1256.
- What is William Kwass's phone number?
- The practice phone number listed in the NPPES registry for William Kwass is (520) 269-7547.
- Does William Kwass accept Medicare?
- William Kwass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Kwass's NPI active?
- Yes — William Kwass's NPI (1669834446) is active in the NPPES registry as of the last update on 2026-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.