William Delaney, MD
NPI 1942387634 · Internal Medicine Physician · Danbury, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Delaney, MD is a Internal Medicine Physician provider in Danbury, CT (NPI 1942387634).
Provider details
- NPI number
- 1942387634
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 26131 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 77 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 230 | 107 |
| Oxycodone Hcl | 147 | 19 |
| Metformin Hcl | 117 | 57 |
| Lisinopril | 101 | 49 |
| Gabapentin | 98 | 40 |
| Alprazolam | 89 | — |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Delaney's NPI number?
- William Delaney's National Provider Identifier (NPI) is 1942387634, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Delaney's specialty?
- William Delaney is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Delaney located?
- William Delaney's practice location on file with NPPES is 70 Main St, Danbury, CT 06810-7832.
- What is William Delaney's phone number?
- The practice phone number listed in the NPPES registry for William Delaney is (203) 791-5030.
- Does William Delaney accept Medicare?
- William Delaney is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Delaney's NPI active?
- Yes — William Delaney's NPI (1942387634) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.