William Gaspar, MD
NPI 1497739015 · Internal Medicine Physician · Chandler, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gaspar, MD is a Internal Medicine Physician provider in Chandler, AZ (NPI 1497739015).
Provider details
- NPI number
- 1497739015
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 68691 (AZ)
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
686 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 455 | $74 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 147 | $76 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 40 | $158 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 29 | $108 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 15 | $113 |
Typical Medicare-allowed amounts for these services range $74–$158 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefuroxime Axetilbrand: Cefuroxime | 24 | 24 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 | 21 |
| Levofloxacin | 21 | 21 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 20 | 20 |
| Tamsulosin Hcl | 17 | — |
| Finasteride | 16 | — |
Practice location
Mailing address
Additional practice locations (1)
- 4311 E Lohman AveLas Cruces, NM 88011-8255Phone: (575) 556-7600
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2026-03-02
- Certified
- 2026-03-02
Frequently asked questions
- What is William Gaspar's NPI number?
- William Gaspar's National Provider Identifier (NPI) is 1497739015, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gaspar's specialty?
- William Gaspar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Gaspar located?
- William Gaspar's practice location on file with NPPES is 1860 S Alma School Rd, Chandler, AZ 85286-7078.
- What is William Gaspar's phone number?
- The practice phone number listed in the NPPES registry for William Gaspar is (480) 361-1955.
- Does William Gaspar accept Medicare?
- William Gaspar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gaspar's NPI active?
- Yes — William Gaspar's NPI (1497739015) is active in the NPPES registry as of the last update on 2026-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.